{"id":89980,"date":"2026-08-04T12:48:33","date_gmt":"2026-08-04T04:48:33","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/89980.html"},"modified":"2026-08-04T12:48:33","modified_gmt":"2026-08-04T04:48:33","slug":"34-%e3%80%90java%e3%80%91i-o%e6%b5%81%ef%bc%88%e4%b8%8b%ef%bc%89%ef%bc%9anio%e4%b8%8e%e6%96%87%e4%bb%b6%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/89980.html","title":{"rendered":"34.\u3010Java\u3011I\/O\u6d41\uff08\u4e0b\uff09\uff1aNIO\u4e0e\u6587\u4ef6\u64cd\u4f5c"},"content":{"rendered":"<p>\u6458\u8981&#xff1a; \u672c\u6587\u5168\u9762\u4ecb\u7ecdJava NIO.2\u6587\u4ef6\u64cd\u4f5cAPI&#xff0c;\u6db5\u76d6\u4ece\u4f20\u7edfI\/O\u5230\u73b0\u4ee3NIO.2\u7684\u5347\u7ea7\u8def\u5f84\u3002\u8be6\u7ec6\u8bb2\u89e3Path\u63a5\u53e3\u3001Files\u5de5\u5177\u7c7b\u7684\u6838\u5fc3\u7528\u6cd5&#xff0c;\u5305\u62ec\u6587\u4ef6\u521b\u5efa\u3001\u8bfb\u5199\u3001\u590d\u5236\u3001\u79fb\u52a8\u3001\u5220\u9664\u7b49\u57fa\u7840\u64cd\u4f5c&#xff0c;\u4ee5\u53ca\u76ee\u5f55\u904d\u5386\u3001\u6587\u4ef6\u5c5e\u6027\u83b7\u53d6\u3001\u4e0e\u65e7API\u4e92\u64cd\u4f5c\u7b49\u9ad8\u7ea7\u529f\u80fd\u3002\u901a\u8fc7\u4e30\u5bcc\u7684\u4ee3\u7801\u793a\u4f8b\u548c\u7efc\u5408\u5de5\u5177\u7c7b\u5c55\u793a&#xff0c;\u5e2e\u52a9\u5f00\u53d1\u8005\u638c\u63e1\u66f4\u7b80\u6d01\u3001\u9ad8\u6548\u7684Java\u6587\u4ef6\u5904\u7406\u65b9\u5f0f&#xff0c;\u63d0\u5347\u65e5\u5e38\u5f00\u53d1\u6548\u7387\u3002<\/p>\n<p>\u5173\u952e\u8bcd&#xff1a; Java NIO.2, Path\u63a5\u53e3, Files\u5de5\u5177\u7c7b, \u6587\u4ef6\u64cd\u4f5c, \u76ee\u5f55\u904d\u5386<\/p>\n<hr \/>\n<p>\u5728\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d&#xff0c;\u6211\u4eec\u5b66\u4e60\u4e86 Java I\/O \u6d41\u7684\u57fa\u7840&#xff1a;\u5b57\u8282\u6d41\u3001\u5b57\u7b26\u6d41\u3001\u7f13\u51b2\u6d41\u548c\u8f6c\u6362\u6d41\u3002\u4f60\u5e94\u8be5\u5df2\u7ecf\u80fd\u7528 FileInputStream\u3001BufferedReader \u7b49\u5de5\u5177\u8bfb\u5199\u6587\u4ef6\u4e86\u3002<\/p>\n<p>\u4f46\u4f60\u53ef\u80fd\u4e5f\u9690\u9690\u611f\u89c9\u5230&#xff1a;\u90a3\u4e9b API \u7528\u8d77\u6765\u6709\u70b9\u201c\u7b28\u91cd\u201d\u3002<\/p>\n<p>\u6bd4\u5982&#xff0c;\u8981\u8bfb\u53d6\u4e00\u4e2a\u6587\u672c\u6587\u4ef6\u7684\u6240\u6709\u884c&#xff0c;\u4f60\u9700\u8981\u5d4c\u5957\u591a\u5c42\u88c5\u9970\u5668&#xff1a;new BufferedReader(new InputStreamReader(new FileInputStream(&#034;test.txt&#034;), &#034;UTF-8&#034;))\u2014\u2014\u8fd9\u4e00\u4e32\u5199\u8d77\u6765\u65e2\u5197\u957f\u53c8\u5bb9\u6613\u51fa\u9519\u3002\u800c\u4e14&#xff0c;\u53e4\u8001\u7684 File \u7c7b\u5728\u6587\u4ef6\u64cd\u4f5c\u4e0a\u4e5f\u6709\u5f88\u591a\u4e0d\u8db3&#xff1a;\u5b83\u53ea\u80fd\u68c0\u67e5\u6587\u4ef6\u662f\u5426\u5b58\u5728\u3001\u83b7\u53d6\u6587\u4ef6\u540d&#xff0c;\u4f46\u590d\u5236\u3001\u79fb\u52a8\u3001\u904d\u5386\u76ee\u5f55\u8fd9\u4e9b\u5e38\u89c1\u64cd\u4f5c\u90fd\u9700\u8981\u4f60\u81ea\u5df1\u5199\u5faa\u73af\u548c\u9012\u5f52&#xff0c;\u975e\u5e38\u4e0d\u65b9\u4fbf\u3002<\/p>\n<p>\u597d\u5728 Java \u65e9\u5728 2011 \u5e74&#xff08;JDK 7&#xff09;\u5c31\u5f15\u5165\u4e86\u4e00\u5957\u5168\u65b0\u7684\u6587\u4ef6 I\/O API&#xff0c;\u53eb\u505a NIO.2&#xff08;New I\/O 2.0&#xff09;\u3002\u5b83\u5f7b\u5e95\u6539\u53d8\u4e86 Java \u5904\u7406\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u65b9\u5f0f&#xff0c;\u63d0\u4f9b\u4e86&#xff1a;<\/p>\n<ul>\n<li>\u66f4\u7b80\u6d01\u3001\u66f4\u76f4\u89c2\u7684 API&#xff08;Path \u63a5\u53e3\u548c Files \u5de5\u5177\u7c7b&#xff09;<\/li>\n<li>\u652f\u6301\u7b26\u53f7\u94fe\u63a5\u3001\u6587\u4ef6\u5c5e\u6027\u3001\u76ee\u5f55\u6d41\u7b49\u9ad8\u7ea7\u7279\u6027<\/li>\n<li>\u66f4\u9ad8\u6548\u7684\u5f02\u6b65 I\/O \u80fd\u529b&#xff08;\u672c\u7bc7\u4e0d\u6d89\u53ca&#xff09;<\/li>\n<\/ul>\n<p>\u4eca\u5929&#xff0c;\u6211\u4eec\u5c31\u6765\u5168\u9762\u5b66\u4e60\u8fd9\u5957\u73b0\u4ee3\u5316\u7684\u6587\u4ef6\u64cd\u4f5c API\u3002\u4ee5\u540e\u4f60\u5199\u6587\u4ef6\u64cd\u4f5c&#xff0c;\u51e0\u4e4e\u53ef\u4ee5\u544a\u522b\u4f20\u7edf\u7684 File \u548c FileInputStream \u4e86\u3002<\/p>\n<hr \/>\n<h4>1. \u4ece File \u5230 Path \u2014\u2014 \u66f4\u73b0\u4ee3\u7684\u8def\u5f84\u8868\u793a<\/h4>\n<p>\u5728 NIO.2 \u4e2d&#xff0c;\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u8def\u5f84\u4e0d\u518d\u7528 File \u7c7b\u8868\u793a&#xff0c;\u800c\u662f\u7528 Path \u63a5\u53e3\u3002Path \u6bd4 File \u66f4\u7075\u6d3b&#xff0c;\u652f\u6301\u591a\u79cd\u6587\u4ef6\u7cfb\u7edf&#xff08;\u6bd4\u5982 ZIP \u6587\u4ef6\u7cfb\u7edf&#xff09;&#xff0c;\u5e76\u4e14\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u65b9\u6cd5\u6765\u64cd\u4f5c\u8def\u5f84\u3002<\/p>\n<h5>1.1 \u521b\u5efa Path \u5bf9\u8c61<\/h5>\n<p>\u4f7f\u7528 Paths.get() \u9759\u6001\u65b9\u6cd5&#xff1a;<\/p>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Path<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Paths<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">PathDemo<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u7528\u5b57\u7b26\u4e32\u521b\u5efa Path<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> path1 <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/home\/user\/test.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> path2 <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;docs&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;readme.md&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u591a\u53c2\u6570&#xff0c;\u81ea\u52a8\u62fc\u63a5<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> path3 <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;.&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5f53\u524d\u76ee\u5f55<\/span><\/p>\n<p>        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>path1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \/home\/user\/test.txt<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>path2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ docs\/readme.md<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>path3<span class=\"token punctuation\">.<\/span><span class=\"token function\">toAbsolutePath<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\u7684\u7edd\u5bf9\u8def\u5f84<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728 Windows \u4e0a&#xff0c;\u8def\u5f84\u5206\u9694\u7b26\u662f \\\\&#xff0c;\u4f46\u4f60\u53ef\u4ee5\u5728\u4ee3\u7801\u91cc\u7edf\u4e00\u4f7f\u7528 \/&#xff0c;Paths.get() \u4f1a\u81ea\u52a8\u9002\u914d\u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n<h5>1.2 Path \u7684\u5e38\u7528\u65b9\u6cd5<\/h5>\n<p><span class=\"token class-name\">Path<\/span> p <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/home\/user\/projects\/demo\/config.properties&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6587\u4ef6\u540d&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getFileName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ config.properties<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u7236\u8def\u5f84&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getParent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>             <span class=\"token comment\">\/\/ \/home\/user\/projects\/demo<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6839\u8def\u5f84&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getRoot<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>               <span class=\"token comment\">\/\/ \/<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u540d\u79f0\u5143\u7d20\u4e2a\u6570&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getNameCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ 5<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u7b2c2\u4e2a\u5143\u7d20&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ user<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u62fc\u63a5\u8def\u5f84<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> newPath <span class=\"token operator\">&#061;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">resolveSibling<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;backup.properties&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u540c\u76ee\u5f55\u4e0b\u5176\u4ed6\u6587\u4ef6&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> newPath<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \/home\/user\/projects\/demo\/backup.properties<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u89c4\u8303\u5316&#xff08;\u53bb\u9664 . \u548c ..&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> normalized <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/home\/..\/user\/.\/test.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">normalize<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>normalized<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \/user\/test.txt<\/span><\/p>\n<p>Path \u7684 API \u8bbe\u8ba1\u5f97\u5f88\u76f4\u89c2&#xff0c;\u65b9\u6cd5\u540d\u5c31\u80fd\u770b\u51fa\u7528\u9014\u3002<\/p>\n<hr \/>\n<h4>2. Files \u5de5\u5177\u7c7b \u2014\u2014 \u6587\u4ef6\u64cd\u4f5c\u7684\u201c\u745e\u58eb\u519b\u5200\u201d<\/h4>\n<p>Files \u662f NIO.2 \u7684\u6838\u5fc3\u5de5\u5177\u7c7b&#xff0c;\u63d0\u4f9b\u4e86\u6d77\u91cf\u7684\u9759\u6001\u65b9\u6cd5&#xff0c;\u7528\u4e8e\u521b\u5efa\u3001\u590d\u5236\u3001\u79fb\u52a8\u3001\u5220\u9664\u3001\u8bfb\u53d6\u3001\u5199\u5165\u6587\u4ef6&#xff0c;\u4ee5\u53ca\u64cd\u4f5c\u76ee\u5f55\u548c\u6587\u4ef6\u5c5e\u6027\u3002\u5b83\u6bd4\u4f20\u7edf\u7684 File \u5f3a\u5927\u592a\u591a\u4e86\u3002<\/p>\n<p>\u91cd\u8981&#xff1a;Files \u7c7b\u6240\u6709\u65b9\u6cd5\u5728\u53d1\u751f I\/O \u9519\u8bef\u65f6\u90fd\u4f1a\u629b\u51fa IOException&#xff08;\u53d7\u68c0\u5f02\u5e38&#xff09;&#xff0c;\u6240\u4ee5\u8c03\u7528\u65f6\u9700\u8981\u7528 try-catch \u6216 throws\u3002<\/p>\n<h5>2.1 \u6587\u4ef6\u5b58\u5728\u6027\u68c0\u67e5\u548c\u521b\u5efa<\/h5>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Files<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Path<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Paths<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">IOException<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">FilesCheckDemo<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> path <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;test.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u68c0\u67e5\u6587\u4ef6\u662f\u5426\u5b58\u5728<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">exists<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6587\u4ef6\u5b58\u5728&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6587\u4ef6\u4e0d\u5b58\u5728&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u68c0\u67e5\u662f\u5426\u4e3a\u666e\u901a\u6587\u4ef6&#xff08;\u4e0d\u662f\u76ee\u5f55&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">boolean<\/span> isRegular <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">isRegularFile<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u68c0\u67e5\u662f\u5426\u4e3a\u76ee\u5f55<\/span><br \/>\n        <span class=\"token keyword\">boolean<\/span> isDir <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">isDirectory<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u68c0\u67e5\u662f\u5426\u53ef\u8bfb\u3001\u53ef\u5199\u3001\u53ef\u6267\u884c<\/span><br \/>\n        <span class=\"token keyword\">boolean<\/span> readable <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">isReadable<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">boolean<\/span> writable <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">isWritable<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">boolean<\/span> executable <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">isExecutable<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>2.2 \u521b\u5efa\u6587\u4ef6\u3001\u76ee\u5f55\u548c\u4e34\u65f6\u6587\u4ef6<\/h5>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u7a7a\u6587\u4ef6&#xff08;\u5982\u679c\u4e0d\u5b58\u5728&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> file <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;newfile.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">createFile<\/span><span class=\"token punctuation\">(<\/span>file<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5982\u679c\u6587\u4ef6\u5df2\u5b58\u5728\u4f1a\u629b\u51fa FileAlreadyExistsException<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u76ee\u5f55&#xff08;\u5355\u5c42&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> dir <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;mydir&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">createDirectory<\/span><span class=\"token punctuation\">(<\/span>dir<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5982\u679c\u7236\u76ee\u5f55\u4e0d\u5b58\u5728\u6216\u76ee\u5f55\u5df2\u5b58\u5728\u4f1a\u629b\u5f02\u5e38<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u591a\u7ea7\u76ee\u5f55&#xff08;\u7236\u76ee\u5f55\u4e0d\u5b58\u5728\u65f6\u81ea\u52a8\u521b\u5efa&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> deepDir <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;a\/b\/c\/d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">createDirectories<\/span><span class=\"token punctuation\">(<\/span>deepDir<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u63a8\u8350\u4f7f\u7528\u8fd9\u4e2a<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u4e34\u65f6\u6587\u4ef6\/\u76ee\u5f55<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> tempFile <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">createTempFile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;prefix&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;.tmp&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> tempDir <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">createTempDirectory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;my-temp&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u4e34\u65f6\u6587\u4ef6&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> tempFile<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u4e34\u65f6\u76ee\u5f55&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> tempDir<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h4>3. \u8bfb\u53d6\u548c\u5199\u5165\u6587\u4ef6 \u2014\u2014 \u6700\u5e38\u7528\u7684\u64cd\u4f5c<\/h4>\n<p>NIO.2 \u8ba9\u6587\u4ef6\u8bfb\u5199\u53d8\u5f97\u5f02\u5e38\u7b80\u5355\u3002\u4f60\u4e0d\u518d\u9700\u8981\u624b\u52a8\u5904\u7406 InputStream\u3001Reader \u548c\u5faa\u73af\u4e86\u3002<\/p>\n<h5>3.1 \u8bfb\u53d6\u6240\u6709\u5b57\u8282\/\u884c&#xff08;\u5c0f\u6587\u4ef6&#xff09;<\/h5>\n<p>\u5bf9\u4e8e\u5c0f\u6587\u4ef6&#xff08;\u6bd4\u5982\u914d\u7f6e\u6587\u4ef6\u3001\u65e5\u5fd7\u7247\u6bb5&#xff09;&#xff0c;\u4f60\u53ef\u4ee5\u4e00\u6b21\u6027\u8bfb\u53d6\u6240\u6709\u5185\u5bb9&#xff1a;<\/p>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Files<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Paths<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">IOException<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">List<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ReadWriteDemo<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> path <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;test.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 1. \u8bfb\u53d6\u6240\u6709\u5b57\u8282&#xff08;\u8fd4\u56de byte[]&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> bytes <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">readAllBytes<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> content <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">String<\/span><span class=\"token punctuation\">(<\/span>bytes<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;UTF-8&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5185\u5bb9&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> content<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 2. \u8bfb\u53d6\u6240\u6709\u884c&#xff08;\u8fd4\u56de List&lt;String&gt;&#xff09;<\/span><br \/>\n        <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> lines <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">readAllLines<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>charset<span class=\"token punctuation\">.<\/span><\/span>StandardCharsets<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">UTF_8<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        lines<span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token operator\">::<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 3. \u5199\u5165\u5b57\u8282<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> newContent <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Hello, NIO!&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> newContent<span class=\"token punctuation\">.<\/span><span class=\"token function\">getBytes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;UTF-8&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 4. \u5199\u5165\u884c&#xff08;\u8986\u76d6&#xff09;<\/span><br \/>\n        <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> newLines <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">List<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">of<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u7b2c\u4e00\u884c&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u7b2c\u4e8c\u884c&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u7b2c\u4e09\u884c&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> newLines<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>charset<span class=\"token punctuation\">.<\/span><\/span>StandardCharsets<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">UTF_8<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 5. \u8ffd\u52a0\u5230\u6587\u4ef6<\/span><br \/>\n        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u8ffd\u52a0\u7684\u5185\u5bb9&#034;<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getBytes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;UTF-8&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                    <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span>StandardOpenOption<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">APPEND<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>Files.write() \u9ed8\u8ba4\u662f\u8986\u76d6\u6a21\u5f0f\u3002\u5982\u679c\u60f3\u8ffd\u52a0&#xff0c;\u4f20\u5165 StandardOpenOption.APPEND\u3002<\/p>\n<h5>3.2 \u6d41\u5f0f\u8bfb\u53d6&#xff08;\u5927\u6587\u4ef6&#xff09;<\/h5>\n<p>\u5bf9\u4e8e\u5927\u6587\u4ef6&#xff0c;\u4e00\u6b21\u6027\u8bfb\u53d6\u6240\u6709\u884c\u53ef\u80fd\u4f1a\u5360\u7528\u5927\u91cf\u5185\u5b58\u3002\u8fd9\u65f6\u53ef\u4ee5\u7528 Files.lines() \u65b9\u6cd5&#xff0c;\u5b83\u8fd4\u56de\u4e00\u4e2a Stream&lt;String&gt;&#xff0c;\u53ef\u4ee5\u9010\u884c\u5904\u7406&#xff0c;\u4e0d\u4f1a\u4e00\u6b21\u6027\u52a0\u8f7d\u5168\u90e8\u5185\u5bb9\u5230\u5185\u5b58\u3002<\/p>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Files<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Paths<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">IOException<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>charset<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">StandardCharsets<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">StreamLinesDemo<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> path <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;large_log.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u4f7f\u7528 try-with-resources \u786e\u4fdd Stream \u88ab\u5173\u95ed<\/span><br \/>\n        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">var<\/span> lines <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">lines<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">StandardCharsets<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">UTF_8<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u53ea\u5904\u7406\u524d 10 \u884c<\/span><br \/>\n            lines<span class=\"token punctuation\">.<\/span><span class=\"token function\">limit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                 <span class=\"token punctuation\">.<\/span><span class=\"token function\">filter<\/span><span class=\"token punctuation\">(<\/span>line <span class=\"token operator\">-&gt;<\/span> line<span class=\"token punctuation\">.<\/span><span class=\"token function\">contains<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;ERROR&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                 <span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token operator\">::<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>Files.lines() \u8fd4\u56de\u7684 Stream \u662f\u5ef6\u8fdf\u52a0\u8f7d\u7684&#xff0c;\u5e76\u4e14\u5fc5\u987b\u7528 try-with-resources \u5173\u95ed&#xff0c;\u5426\u5219\u53ef\u80fd\u9020\u6210\u8d44\u6e90\u6cc4\u6f0f\u3002<\/p>\n<h5>3.3 \u8bfb\u5199\u4e8c\u8fdb\u5236\u6587\u4ef6<\/h5>\n<p>\u540c\u6837\u7528 readAllBytes() \u548c write() \u5373\u53ef&#xff1a;<\/p>\n<p><span class=\"token class-name\">Path<\/span> src <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;image.jpg&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> dest <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;copy.jpg&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">byte<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> data <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">readAllBytes<\/span><span class=\"token punctuation\">(<\/span>src<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>dest<span class=\"token punctuation\">,<\/span> data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u4e8c\u8fdb\u5236\u590d\u5236<\/span><\/p>\n<hr \/>\n<h4>4. \u590d\u5236\u3001\u79fb\u52a8\u3001\u5220\u9664\u6587\u4ef6<\/h4>\n<h5>4.1 \u590d\u5236\u6587\u4ef6<\/h5>\n<p><span class=\"token class-name\">Path<\/span> source <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;source.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> target <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;target.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u590d\u5236\u6587\u4ef6&#xff08;\u5982\u679c\u76ee\u6807\u5df2\u5b58\u5728\u4f1a\u629b\u51fa FileAlreadyExistsException&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">copy<\/span><span class=\"token punctuation\">(<\/span>source<span class=\"token punctuation\">,<\/span> target<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8986\u76d6\u5df2\u5b58\u5728\u7684\u76ee\u6807<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">copy<\/span><span class=\"token punctuation\">(<\/span>source<span class=\"token punctuation\">,<\/span> target<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span>StandardCopyOption<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">REPLACE_EXISTING<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u590d\u5236\u5230\u76ee\u5f55&#xff08;\u4fdd\u6301\u6587\u4ef6\u540d&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> destDir <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;backup\/&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">copy<\/span><span class=\"token punctuation\">(<\/span>source<span class=\"token punctuation\">,<\/span> destDir<span class=\"token punctuation\">.<\/span><span class=\"token function\">resolve<\/span><span class=\"token punctuation\">(<\/span>source<span class=\"token punctuation\">.<\/span><span class=\"token function\">getFileName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Files.copy() \u4e5f\u652f\u6301\u590d\u5236\u76ee\u5f55&#xff08;\u4f46\u4e0d\u4f1a\u9012\u5f52\u590d\u5236\u5185\u5bb9&#xff0c;\u9700\u8981\u81ea\u5df1\u904d\u5386&#xff09;\u3002<\/p>\n<h5>4.2 \u79fb\u52a8\u6587\u4ef6&#xff08;\u6216\u91cd\u547d\u540d&#xff09;<\/h5>\n<p><span class=\"token class-name\">Path<\/span> source <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;data.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> target <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;archive\/data.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u79fb\u52a8\u6587\u4ef6&#xff08;\u5982\u679c\u76ee\u6807\u5df2\u5b58\u5728\u4f1a\u629b\u5f02\u5e38&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">move<\/span><span class=\"token punctuation\">(<\/span>source<span class=\"token punctuation\">,<\/span> target<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8986\u76d6\u5df2\u6709\u6587\u4ef6&#xff0c;\u5e76\u539f\u5b50\u5730\u6267\u884c\u79fb\u52a8&#xff08;\u5982\u679c\u6587\u4ef6\u7cfb\u7edf\u652f\u6301&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">move<\/span><span class=\"token punctuation\">(<\/span>source<span class=\"token punctuation\">,<\/span> target<span class=\"token punctuation\">,<\/span><br \/>\n           <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span>StandardCopyOption<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">REPLACE_EXISTING<\/span><span class=\"token punctuation\">,<\/span><br \/>\n           <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span>StandardCopyOption<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">ATOMIC_MOVE<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u79fb\u52a8\u548c\u590d\u5236\u90fd\u53ef\u4ee5\u8bbe\u7f6e\u9009\u9879&#xff1a;REPLACE_EXISTING&#xff08;\u8986\u76d6&#xff09;\u3001ATOMIC_MOVE&#xff08;\u539f\u5b50\u79fb\u52a8&#xff09;\u3001COPY_ATTRIBUTES&#xff08;\u590d\u5236\u6587\u4ef6\u5c5e\u6027&#xff09;\u3002<\/p>\n<h5>4.3 \u5220\u9664\u6587\u4ef6\u6216\u76ee\u5f55<\/h5>\n<p><span class=\"token class-name\">Path<\/span> file <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;temp.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5220\u9664\u6587\u4ef6&#xff08;\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\u629b\u51fa NoSuchFileException&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">delete<\/span><span class=\"token punctuation\">(<\/span>file<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b89\u5168\u5220\u9664&#xff1a;\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728&#xff0c;\u4e0d\u629b\u51fa\u5f02\u5e38&#xff0c;\u8fd4\u56de boolean<\/span><br \/>\n<span class=\"token keyword\">boolean<\/span> deleted <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">deleteIfExists<\/span><span class=\"token punctuation\">(<\/span>file<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u662f\u5426\u5220\u9664\u6210\u529f&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> deleted<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5220\u9664\u76ee\u5f55&#xff08;\u5fc5\u987b\u4e3a\u7a7a&#xff09;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> emptyDir <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;mydir&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">deleteIfExists<\/span><span class=\"token punctuation\">(<\/span>emptyDir<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8981\u5220\u9664\u975e\u7a7a\u76ee\u5f55&#xff0c;\u9700\u8981\u9012\u5f52\u904d\u5386\u5220\u9664\u6240\u6709\u5b50\u6587\u4ef6\u548c\u5b50\u76ee\u5f55&#xff08;\u540e\u9762\u4f1a\u8bb2\u5982\u4f55\u904d\u5386&#xff09;\u3002<\/p>\n<hr \/>\n<h4>5. \u76ee\u5f55\u904d\u5386 \u2014\u2014 \u63a2\u7d22\u6587\u4ef6\u6811<\/h4>\n<p>NIO.2 \u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u76ee\u5f55\u904d\u5386\u80fd\u529b&#xff0c;\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u5217\u51fa\u76ee\u5f55\u5185\u5bb9\u3001\u641c\u7d22\u6587\u4ef6\u3001\u9012\u5f52\u5904\u7406\u6574\u4e2a\u76ee\u5f55\u6811\u3002<\/p>\n<h5>5.1 \u5217\u51fa\u76ee\u5f55\u5185\u5bb9&#xff08;\u6d45\u5c42&#xff09;<\/h5>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Files<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Path<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Paths<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">IOException<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>stream<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Stream<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ListDirDemo<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> dir <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;.&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u65b9\u5f0f\u4e00&#xff1a;Files.list() \u8fd4\u56de Stream&lt;Path&gt;&#xff08;\u53ea\u5305\u542b\u4e00\u5c42&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Stream<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Path<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> entries <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">list<\/span><span class=\"token punctuation\">(<\/span>dir<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            entries<span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token operator\">::<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u65b9\u5f0f\u4e8c&#xff1a;\u53ea\u904d\u5386\u76ee\u5f55&#xff08;\u8fc7\u6ee4&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Stream<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Path<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> entries <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">list<\/span><span class=\"token punctuation\">(<\/span>dir<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            entries<span class=\"token punctuation\">.<\/span><span class=\"token function\">filter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Files<\/span><span class=\"token operator\">::<\/span><span class=\"token function\">isDirectory<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                   <span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token operator\">::<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>Files.list() \u4e0d\u662f\u9012\u5f52\u7684&#xff0c;\u53ea\u5217\u51fa\u5f53\u524d\u76ee\u5f55\u7684\u76f4\u63a5\u5b50\u9879\u3002<\/p>\n<h5>5.2 \u9012\u5f52\u904d\u5386\u6574\u4e2a\u76ee\u5f55\u6811<\/h5>\n<p>\u5982\u679c\u9700\u8981\u9012\u5f52\u904d\u5386\u6240\u6709\u5b50\u76ee\u5f55&#xff0c;\u4f7f\u7528 Files.walk()\u3002\u5b83\u8fd4\u56de\u4e00\u4e2a Stream&lt;Path&gt;&#xff0c;\u6df1\u5ea6\u4f18\u5148\u904d\u5386\u6574\u4e2a\u76ee\u5f55\u6811\u3002<\/p>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Files<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Path<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Paths<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">IOException<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">WalkDemo<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> start <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;src&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u904d\u5386 src \u76ee\u5f55\u4e0b\u7684\u6240\u6709\u6587\u4ef6&#xff08;\u5305\u62ec\u5b50\u76ee\u5f55&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">var<\/span> paths <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">walk<\/span><span class=\"token punctuation\">(<\/span>start<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            paths<span class=\"token punctuation\">.<\/span><span class=\"token function\">filter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Files<\/span><span class=\"token operator\">::<\/span><span class=\"token function\">isRegularFile<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                 <span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token operator\">::<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u9650\u5236\u904d\u5386\u6df1\u5ea6&#xff08;\u6bd4\u5982\u53ea\u904d\u5386\u4e24\u5c42&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">var<\/span> paths <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">walk<\/span><span class=\"token punctuation\">(<\/span>start<span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            paths<span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token operator\">::<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>5.3 \u641c\u7d22\u6587\u4ef6&#xff08;Find&#xff09;<\/h5>\n<p>Files.find() \u65b9\u6cd5\u53ef\u4ee5\u7ed3\u5408\u6df1\u5ea6\u548c\u8c13\u8bcd&#xff08;\u6761\u4ef6&#xff09;\u6765\u641c\u7d22\u6587\u4ef6\u3002<\/p>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Files<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Path<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Paths<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">IOException<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span>attribute<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">BasicFileAttributes<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">FindDemo<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> start <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;.&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u641c\u7d22\u6240\u6709\u6269\u5c55\u540d\u4e3a .txt \u6216 .log \u7684\u6587\u4ef6<\/span><br \/>\n        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">var<\/span> paths <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>start<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">MAX_VALUE<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                <span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> attrs<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token class-name\">String<\/span> name <span class=\"token operator\">&#061;<\/span> path<span class=\"token punctuation\">.<\/span><span class=\"token function\">getFileName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token keyword\">return<\/span> name<span class=\"token punctuation\">.<\/span><span class=\"token function\">endsWith<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;.txt&#034;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">||<\/span> name<span class=\"token punctuation\">.<\/span><span class=\"token function\">endsWith<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;.log&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            paths<span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token operator\">::<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u641c\u7d22\u6700\u8fd1 7 \u5929\u5185\u4fee\u6539\u8fc7\u7684\u6587\u4ef6&#xff08;\u9700\u8981 BasicFileAttributes&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">long<\/span> sevenDaysAgo <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">currentTimeMillis<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">7<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">24<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">3600<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">var<\/span> paths <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>start<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">MAX_VALUE<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                <span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> attrs<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span> attrs<span class=\"token punctuation\">.<\/span><span class=\"token function\">lastModifiedTime<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toMillis<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> sevenDaysAgo<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            paths<span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token operator\">::<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>Files.find() \u6bd4 walk() &#043; filter() \u66f4\u9ad8\u6548&#xff0c;\u56e0\u4e3a\u5b83\u53ef\u4ee5\u5728\u904d\u5386\u8fc7\u7a0b\u4e2d\u5c31\u8fdb\u884c\u7b5b\u9009&#xff0c;\u4e14\u80fd\u8bbf\u95ee\u6587\u4ef6\u5c5e\u6027\u3002<\/p>\n<h5>5.4 \u7528 FileVisitor \u8fdb\u884c\u66f4\u7cbe\u7ec6\u7684\u63a7\u5236<\/h5>\n<p>\u5982\u679c\u9700\u8981\u66f4\u590d\u6742\u7684\u904d\u5386\u903b\u8f91&#xff08;\u6bd4\u5982\u5728\u904d\u5386\u4e2d\u5220\u9664\u6587\u4ef6\u3001\u5904\u7406\u7b26\u53f7\u94fe\u63a5\u7b49&#xff09;&#xff0c;\u53ef\u4ee5\u4f7f\u7528 Files.walkFileTree() &#043; SimpleFileVisitor\u3002\u8fd9\u662f\u4f20\u7edf\u65b9\u5f0f&#xff0c;\u9002\u5408\u9700\u8981\u7cbe\u7ec6\u63a7\u5236\u7684\u573a\u666f\u3002<\/p>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token operator\">*<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span>attribute<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">BasicFileAttributes<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">IOException<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">DeleteDirVisitor<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">SimpleFileVisitor<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Path<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">FileVisitResult<\/span> <span class=\"token function\">visitFile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Path<\/span> file<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">BasicFileAttributes<\/span> attrs<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">delete<\/span><span class=\"token punctuation\">(<\/span>file<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5220\u9664\u6587\u4ef6<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5220\u9664\u6587\u4ef6&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> file<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">FileVisitResult<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">CONTINUE<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">FileVisitResult<\/span> <span class=\"token function\">postVisitDirectory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Path<\/span> dir<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">IOException<\/span> exc<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">delete<\/span><span class=\"token punctuation\">(<\/span>dir<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5220\u9664\u76ee\u5f55&#xff08;\u6b64\u65f6\u5df2\u7a7a&#xff09;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5220\u9664\u76ee\u5f55&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> dir<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">FileVisitResult<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">CONTINUE<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> toDelete <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;temp&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">walkFileTree<\/span><span class=\"token punctuation\">(<\/span>toDelete<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">DeleteDirVisitor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5220\u9664\u5b8c\u6210&#xff01;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd9\u79cd\u65b9\u5f0f\u7684\u4f18\u52bf\u662f\u4f60\u80fd\u7cbe\u786e\u63a7\u5236\u8bbf\u95ee\u6bcf\u4e2a\u6587\u4ef6\/\u76ee\u5f55\u65f6\u7684\u884c\u4e3a&#xff08;\u7ee7\u7eed\u3001\u8df3\u8fc7\u3001\u7ec8\u6b62&#xff09;&#xff0c;\u8fd8\u80fd\u5904\u7406\u5f02\u5e38\u3002<\/p>\n<hr \/>\n<h4>6. \u6587\u4ef6\u5c5e\u6027 \u2014\u2014 \u83b7\u53d6\u66f4\u591a\u5143\u6570\u636e<\/h4>\n<p>NIO.2 \u63d0\u4f9b\u4e86\u7edf\u4e00\u7684\u6587\u4ef6\u5c5e\u6027\u8bbf\u95ee\u63a5\u53e3&#xff0c;\u652f\u6301\u4e0d\u540c\u64cd\u4f5c\u7cfb\u7edf\u7684\u7279\u5b9a\u5c5e\u6027\u3002<\/p>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token operator\">*<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">IOException<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span>attribute<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">BasicFileAttributes<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AttrDemo<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> path <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;test.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u83b7\u53d6\u57fa\u7840\u5c5e\u6027&#xff08;\u6240\u6709\u6587\u4ef6\u7cfb\u7edf\u90fd\u652f\u6301&#xff09;<\/span><br \/>\n        <span class=\"token class-name\">BasicFileAttributes<\/span> attrs <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">readAttributes<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">BasicFileAttributes<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u521b\u5efa\u65f6\u95f4&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> attrs<span class=\"token punctuation\">.<\/span><span class=\"token function\">creationTime<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6700\u540e\u4fee\u6539\u65f6\u95f4&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> attrs<span class=\"token punctuation\">.<\/span><span class=\"token function\">lastModifiedTime<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6587\u4ef6\u5927\u5c0f&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> attrs<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u662f\u5426\u662f\u76ee\u5f55&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> attrs<span class=\"token punctuation\">.<\/span><span class=\"token function\">isDirectory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u83b7\u53d6 Posix \u5c5e\u6027&#xff08;Linux\/macOS \u7b49 Unix \u7cfb\u7edf&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">FileSystems<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getDefault<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">supportedFileAttributeViews<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">contains<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;posix&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span>attribute<span class=\"token punctuation\">.<\/span><\/span>PosixFileAttributes<\/span> posixAttrs <span class=\"token operator\">&#061;<\/span><br \/>\n                <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">readAttributes<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span>attribute<span class=\"token punctuation\">.<\/span><\/span>PosixFileAttributes<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6743\u9650&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span>attribute<span class=\"token punctuation\">.<\/span><\/span>PosixFilePermissions<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span>posixAttrs<span class=\"token punctuation\">.<\/span><span class=\"token function\">permissions<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6240\u6709\u8005&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> posixAttrs<span class=\"token punctuation\">.<\/span><span class=\"token function\">owner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u8bbe\u7f6e\u6587\u4ef6\u6743\u9650&#xff08;\u4ec5\u5728 Posix \u7cfb\u7edf\u6709\u6548&#xff09;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">FileSystems<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getDefault<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">supportedFileAttributeViews<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">contains<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;posix&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span>attribute<span class=\"token punctuation\">.<\/span><\/span>PosixFilePermission<\/span> ownerRead <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span>attribute<span class=\"token punctuation\">.<\/span><\/span>PosixFilePermission<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">OWNER_READ<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span>Set<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span>attribute<span class=\"token punctuation\">.<\/span><\/span>PosixFilePermission<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> perms <span class=\"token operator\">&#061;<\/span><br \/>\n                <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span>attribute<span class=\"token punctuation\">.<\/span><\/span>PosixFilePermissions<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">fromString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;rw-r&#8211;r&#8211;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">setPosixFilePermissions<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> perms<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5728 Windows \u4e0b&#xff0c;\u4f60\u53ef\u4ee5\u901a\u8fc7 DosFileAttributes \u83b7\u53d6\u9690\u85cf\u3001\u53ea\u8bfb\u7b49\u5c5e\u6027\u3002<\/p>\n<hr \/>\n<h4>7. \u4e0e\u65e7 I\/O \u7684\u4e92\u64cd\u4f5c<\/h4>\n<p>NIO.2 \u4e0e\u4f20\u7edf\u7684 File \u548c\u6d41\u53ef\u4ee5\u4e92\u76f8\u8f6c\u6362&#xff1a;<\/p>\n<ul>\n<li>Path \u2192 File&#xff1a;path.toFile()<\/li>\n<li>File \u2192 Path&#xff1a;file.toPath()<\/li>\n<li>Path \u2192 InputStream\/OutputStream&#xff1a;Files.newInputStream(path) \u548c Files.newOutputStream(path)<\/li>\n<li>Path \u2192 Reader\/Writer&#xff1a;Files.newBufferedReader(path) \u548c Files.newBufferedWriter(path)<\/li>\n<\/ul>\n<p><span class=\"token comment\">\/\/ \u4f20\u7edf File \u8f6c Path<\/span><br \/>\n<span class=\"token class-name\">File<\/span> oldFile <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">File<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;test.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">Path<\/span> path <span class=\"token operator\">&#061;<\/span> oldFile<span class=\"token punctuation\">.<\/span><span class=\"token function\">toPath<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528 Files \u5de5\u5177\u7c7b\u521b\u5efa\u6d41<\/span><br \/>\n<span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">InputStream<\/span> in <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">newInputStream<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n     <span class=\"token class-name\">BufferedReader<\/span> reader <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">newBufferedReader<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">StandardCharsets<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">UTF_8<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u6df7\u7528 NIO \u548c\u4f20\u7edf\u6d41 API<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4f60\u53ef\u4ee5\u9010\u6b65\u8fc1\u79fb\u4ee3\u7801&#xff0c;\u4e0d\u7528\u4e00\u6b21\u6027\u91cd\u5199\u6240\u6709\u65e7\u7684 I\/O \u4ee3\u7801\u3002<\/p>\n<hr \/>\n<h4>8. \u7efc\u5408\u793a\u4f8b \u2014\u2014 \u4e00\u4e2a\u5b8c\u6574\u7684\u6587\u4ef6\u5de5\u5177\u7c7b<\/h4>\n<p>\u6211\u4eec\u628a\u4eca\u5929\u5b66\u5230\u7684\u5e38\u7528\u64cd\u4f5c\u5c01\u88c5\u6210\u4e00\u4e2a\u5de5\u5177\u7c7b&#xff0c;\u65b9\u4fbf\u4ee5\u540e\u590d\u7528&#xff1a;<\/p>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">IOException<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>charset<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">StandardCharsets<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>nio<span class=\"token punctuation\">.<\/span>file<span class=\"token punctuation\">.<\/span><\/span><span class=\"token operator\">*<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">List<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span>stream<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Stream<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">FileUtil<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token comment\">\/**<br \/>\n     * \u8bfb\u53d6\u6587\u4ef6\u6240\u6709\u884c&#xff08;\u5c0f\u6587\u4ef6&#xff09;<br \/>\n     *\/<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">readAllLines<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> path<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">readAllLines<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">StandardCharsets<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">UTF_8<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/**<br \/>\n     * \u5199\u5165\u6587\u4ef6&#xff08;\u8986\u76d6&#xff09;<br \/>\n     *\/<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">writeAllLines<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> path<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> lines<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> lines<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">StandardCharsets<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">UTF_8<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/**<br \/>\n     * \u8ffd\u52a0\u4e00\u884c\u5230\u6587\u4ef6\u672b\u5c3e<br \/>\n     *\/<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">appendLine<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> path<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> line<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> p <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u786e\u4fdd\u7236\u76ee\u5f55\u5b58\u5728<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getParent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">createDirectories<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getParent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> content <span class=\"token operator\">&#061;<\/span> line <span class=\"token operator\">&#043;<\/span> <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">lineSeparator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">,<\/span> content<span class=\"token punctuation\">.<\/span><span class=\"token function\">getBytes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">StandardCharsets<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">UTF_8<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                    <span class=\"token class-name\">StandardOpenOption<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">APPEND<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">StandardOpenOption<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">CREATE<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/**<br \/>\n     * \u590d\u5236\u6587\u4ef6&#xff0c;\u81ea\u52a8\u521b\u5efa\u76ee\u6807\u76ee\u5f55<br \/>\n     *\/<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">copyFile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> source<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> target<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> src <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>source<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> dest <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>target<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u786e\u4fdd\u76ee\u6807\u76ee\u5f55\u5b58\u5728<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>dest<span class=\"token punctuation\">.<\/span><span class=\"token function\">getParent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">createDirectories<\/span><span class=\"token punctuation\">(<\/span>dest<span class=\"token punctuation\">.<\/span><span class=\"token function\">getParent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">copy<\/span><span class=\"token punctuation\">(<\/span>src<span class=\"token punctuation\">,<\/span> dest<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">StandardCopyOption<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">REPLACE_EXISTING<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/**<br \/>\n     * \u79fb\u52a8\u6587\u4ef6&#xff0c;\u81ea\u52a8\u521b\u5efa\u76ee\u6807\u76ee\u5f55<br \/>\n     *\/<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">moveFile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> source<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> target<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> src <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>source<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> dest <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>target<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>dest<span class=\"token punctuation\">.<\/span><span class=\"token function\">getParent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">createDirectories<\/span><span class=\"token punctuation\">(<\/span>dest<span class=\"token punctuation\">.<\/span><span class=\"token function\">getParent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">move<\/span><span class=\"token punctuation\">(<\/span>src<span class=\"token punctuation\">,<\/span> dest<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">StandardCopyOption<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">REPLACE_EXISTING<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/**<br \/>\n     * \u5220\u9664\u76ee\u5f55\u53ca\u6240\u6709\u5185\u5bb9&#xff08;\u9012\u5f52&#xff09;<br \/>\n     *\/<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">deleteDirectory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> dirPath<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> root <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>dirPath<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">exists<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Stream<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Path<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> walk <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">walk<\/span><span class=\"token punctuation\">(<\/span>root<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u5fc5\u987b\u5148\u5220\u9664\u5b50\u6587\u4ef6&#xff0c;\u518d\u5220\u9664\u76ee\u5f55\u672c\u8eab&#xff08;\u9006\u5e8f&#xff09;<\/span><br \/>\n            walk<span class=\"token punctuation\">.<\/span><span class=\"token function\">sorted<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span> b<span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">compareTo<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">forEach<\/span><span class=\"token punctuation\">(<\/span>p <span class=\"token operator\">-&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                    <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                        <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">deleteIfExists<\/span><span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">IOException<\/span> e<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                        <span class=\"token keyword\">throw<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">RuntimeException<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5220\u9664\u5931\u8d25&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> p<span class=\"token punctuation\">,<\/span> e<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/**<br \/>\n     * \u641c\u7d22\u76ee\u5f55\u4e0b\u6240\u6709\u5339\u914d\u6269\u5c55\u540d\u7684\u6587\u4ef6<br \/>\n     *\/<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Path<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> <span class=\"token function\">searchByExtension<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> rootPath<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> extension<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> start <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>rootPath<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Stream<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Path<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> paths <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">find<\/span><span class=\"token punctuation\">(<\/span>start<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Integer<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">MAX_VALUE<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                <span class=\"token punctuation\">(<\/span>p<span class=\"token punctuation\">,<\/span> attrs<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">-&gt;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">getFileName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">toString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">endsWith<\/span><span class=\"token punctuation\">(<\/span>extension<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> paths<span class=\"token punctuation\">.<\/span><span class=\"token function\">toList<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/**<br \/>\n     * \u83b7\u53d6\u6587\u4ef6\u5927\u5c0f&#xff08;\u4eba\u6027\u5316\u663e\u793a&#xff09;<br \/>\n     *\/<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getHumanReadableSize<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> path<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">long<\/span> size <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">Files<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Paths<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span>path<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> units <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;B&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;KB&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;MB&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;GB&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;TB&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> idx <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">double<\/span> s <span class=\"token operator\">&#061;<\/span> size<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>s <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">1024<\/span> <span class=\"token operator\">&amp;&amp;<\/span> idx <span class=\"token operator\">&lt;<\/span> units<span class=\"token punctuation\">.<\/span>length <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            s <span class=\"token operator\">\/&#061;<\/span> <span class=\"token number\">1024<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            idx<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">String<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">format<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%.2f %s&#034;<\/span><span class=\"token punctuation\">,<\/span> s<span class=\"token punctuation\">,<\/span> units<span class=\"token punctuation\">[<\/span>idx<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u6d4b\u8bd5\u5404\u4e2a\u65b9\u6cd5<\/span><br \/>\n        <span class=\"token function\">appendLine<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;logs\/app.log&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u7a0b\u5e8f\u542f\u52a8\u4e8e &#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>time<span class=\"token punctuation\">.<\/span><\/span>LocalDateTime<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">now<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">copyFile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;config.properties&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;backup\/config_backup.properties&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u6587\u4ef6\u5927\u5c0f&#xff1a;&#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token function\">getHumanReadableSize<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;config.properties&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Path<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> txtFiles <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">searchByExtension<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;.&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;.txt&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u627e\u5230 &#034;<\/span> <span class=\"token operator\">&#043;<\/span> txtFiles<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034; \u4e2a txt \u6587\u4ef6&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<h4>9. \u4f20\u7edf I\/O vs NIO.2 \u2014\u2014 \u4f55\u65f6\u7528\u54ea\u4e2a&#xff1f;<\/h4>\n<table>\n<tr>\u573a\u666f\u63a8\u8350<\/tr>\n<tbody>\n<tr>\n<td>\u65b0\u9879\u76ee\u3001\u65b0\u4ee3\u7801<\/td>\n<td>NIO.2 &#043; Files \u5de5\u5177\u7c7b&#xff0c;\u66f4\u7b80\u6d01\u3001\u66f4\u73b0\u4ee3<\/td>\n<\/tr>\n<tr>\n<td>\u9700\u8981\u5904\u7406\u5927\u6587\u4ef6\u3001\u9ad8\u6027\u80fd<\/td>\n<td>NIO.2&#xff08;\u652f\u6301\u5185\u5b58\u6620\u5c04\u3001\u5f02\u6b65 I\/O&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u9700\u8981\u4e0e\u65e7\u7684 File \u751f\u6001\u5bf9\u63a5<\/td>\n<td>NIO.2 \u53ef\u4e92\u64cd\u4f5c<\/td>\n<\/tr>\n<tr>\n<td>\u9700\u8981\u624b\u52a8\u63a7\u5236\u7f13\u51b2\u3001\u5e95\u5c42\u7ec6\u8282<\/td>\n<td>\u4f20\u7edf\u6d41\u53ef\u80fd\u66f4\u7075\u6d3b&#xff0c;\u4f46\u901a\u5e38\u4e0d\u5fc5\u8981<\/td>\n<\/tr>\n<tr>\n<td>\u7b80\u5355\u8bfb\u5199\u5c0f\u6587\u4ef6<\/td>\n<td>Files.readAllLines() \/ Files.write()<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u603b\u7ed3&#xff1a;\u4ece\u73b0\u5728\u5f00\u59cb&#xff0c;\u4f18\u5148\u4f7f\u7528 NIO.2 \u7684 Path \u548c Files&#xff0c;\u5b83\u4eec\u4f1a\u8ba9\u4f60\u7684\u6587\u4ef6\u64cd\u4f5c\u4ee3\u7801\u66f4\u77ed\u3001\u66f4\u6e05\u6670\u3001\u66f4\u4e0d\u5bb9\u6613\u51fa\u9519\u3002<\/p>\n<hr \/>\n<h4>10. \u4eca\u5929\u7684\u603b\u7ed3<\/h4>\n<p>\u4eca\u5929\u6211\u4eec\u5168\u9762\u5b66\u4e60\u4e86 NIO.2 \u7684\u6587\u4ef6\u64cd\u4f5c&#xff1a;<\/p>\n<ul>\n<li>Path&#xff1a;\u4ee3\u8868\u6587\u4ef6\u6216\u76ee\u5f55\u8def\u5f84&#xff0c;\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u8def\u5f84\u64cd\u4f5c\u65b9\u6cd5\u3002<\/li>\n<li>Files&#xff1a;\u5305\u542b\u4e86\u51e0\u4e4e\u6240\u6709\u6587\u4ef6\u64cd\u4f5c\u7684\u9759\u6001\u65b9\u6cd5&#xff1a;exists\u3001createFile\u3001createDirectories\u3001copy\u3001move\u3001delete\u3001readAllBytes\u3001readAllLines\u3001write \u7b49\u3002<\/li>\n<li>Files.lines()&#xff1a;\u6d41\u5f0f\u8bfb\u53d6\u5927\u6587\u4ef6&#xff0c;\u9010\u884c\u5904\u7406\u3002<\/li>\n<li>\u76ee\u5f55\u904d\u5386&#xff1a;Files.list()&#xff08;\u4e00\u5c42&#xff09;\u3001Files.walk()&#xff08;\u9012\u5f52&#xff09;\u3001Files.find()&#xff08;\u5e26\u6761\u4ef6\u641c\u7d22&#xff09;\u3001walkFileTree()&#xff08;\u7cbe\u7ec6\u63a7\u5236&#xff09;\u3002<\/li>\n<li>\u6587\u4ef6\u5c5e\u6027&#xff1a;\u901a\u8fc7 Files.readAttributes() 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