{"id":24983,"date":"2025-04-19T11:22:13","date_gmt":"2025-04-19T03:22:13","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/24983.html"},"modified":"2025-04-19T11:22:13","modified_gmt":"2025-04-19T03:22:13","slug":"java-%e8%bf%9e%e6%8e%a5-ftp-%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%85%a8%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/24983.html","title":{"rendered":"Java \u8fde\u63a5 FTP \u670d\u52a1\u5668\u5168\u89e3\u6790"},"content":{"rendered":"

Java \u8fde\u63a5 FTP \u670d\u52a1\u5668\u5168\u89e3\u6790<\/h2>\n

\u4e00\u3001\u5f15\u8a00<\/h3>\n

\u5728\u8bb8\u591a\u4f01\u4e1a\u7ea7\u5e94\u7528\u548c\u6570\u636e\u5904\u7406\u573a\u666f\u4e2d，\u4e0e FTP \u670d\u52a1\u5668\u8fdb\u884c\u4ea4\u4e92\u662f\u4e00\u9879\u5e38\u89c1\u4e14\u91cd\u8981\u7684\u4efb\u52a1\u3002Java \u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5de5\u5177\u548c\u5e93\u6765\u5b9e\u73b0\u4e0e FTP \u670d\u52a1\u5668\u7684\u8fde\u63a5\u3001\u6587\u4ef6\u4f20\u8f93\u3001\u76ee\u5f55\u64cd\u4f5c\u7b49\u529f\u80fd\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528 Java \u8fde\u63a5 FTP \u670d\u52a1\u5668，\u5e76\u6df1\u5165\u63a2\u8ba8\u8fde\u63a5\u6210\u529f\u540e\u4e00\u4e9b\u5b9e\u7528\u7684\u64cd\u4f5c\u65b9\u6cd5\u3002<\/p>\n

\u4e8c\u3001Java \u8fde\u63a5 FTP \u6b65\u9aa4\u8be6\u89e3<\/h3>\n

（\u4e00）\u5bfc\u5165\u5fc5\u8981\u7684\u5e93<\/h4>\n

\u5728 Java \u9879\u76ee\u4e2d，\u6211\u4eec\u901a\u5e38\u4f7f\u7528 Apache Commons Net \u5e93\u6765\u5b9e\u73b0 FTP \u529f\u80fd\u3002\u9996\u5148\u9700\u8981\u5728\u9879\u76ee\u7684\u6784\u5efa\u6587\u4ef6（\u5982 Maven \u6216 Gradle）\u4e2d\u6dfb\u52a0\u76f8\u5e94\u7684\u4f9d\u8d56\u9879\u3002\u4ee5 Maven \u4e3a\u4f8b，\u5728 pom.xml \u6587\u4ef6\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u4f9d\u8d56：<\/p>\n

<<\/span>dependency<\/span>><\/span><\/span>
\n <<\/span>groupId<\/span>><\/span><\/span>commons-net<\/<\/span>groupId<\/span>><\/span><\/span>
\n <<\/span>artifactId<\/span>><\/span><\/span>commons-net<\/<\/span>artifactId<\/span>><\/span><\/span>
\n <<\/span>version<\/span>><\/span><\/span>3.8.0<\/<\/span>version<\/span>><\/span><\/span>
\n<\/<\/span>dependency<\/span>><\/span><\/span><\/p>\n

（\u4e8c）\u5efa\u7acb FTP \u8fde\u63a5<\/h4>\n

\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u7684 Java \u4ee3\u7801\u793a\u4f8b\u6765\u8fde\u63a5 FTP \u670d\u52a1\u5668：<\/p>\n

import<\/span> org.<\/span>apache.<\/span>commons.<\/span>net.<\/span>ftp.<\/span><\/span>FTPClient<\/span><\/span>;<\/span>
\nimport<\/span> java.<\/span>net.<\/span><\/span>SocketException<\/span><\/span>;<\/span>
\nimport<\/span> java.<\/span>io.<\/span><\/span>IOException<\/span><\/span>;<\/span><\/p>\n

public<\/span> class<\/span> FTPConnectionExample<\/span> {<\/span>
\n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
\n FTPClient<\/span> ftpClient =<\/span> new<\/span> FTPClient<\/span>(<\/span>)<\/span>;<\/span>
\n String<\/span> ftpServer =<\/span> "your_ftp_server_ip"<\/span>;<\/span>
\n int<\/span> ftpPort =<\/span> 21<\/span>;<\/span>
\n String<\/span> username =<\/span> "your_username"<\/span>;<\/span>
\n String<\/span> password =<\/span> "your_password"<\/span>;<\/span><\/p>\n

try<\/span> {<\/span>
\n \/\/ \u8fde\u63a5 FTP \u670d\u52a1\u5668<\/span>
\n ftpClient.<\/span>connect<\/span>(<\/span>ftpServer,<\/span> ftpPort)<\/span>;<\/span>
\n \/\/ \u767b\u5f55 FTP \u670d\u52a1\u5668<\/span>
\n boolean<\/span> login =<\/span> ftpClient.<\/span>login<\/span>(<\/span>username,<\/span> password)<\/span>;<\/span>
\n boolean<\/span> login1 =<\/span> ftpClient.<\/span>login<\/span>(<\/span>"anonymous"<\/span>,<\/span> ""<\/span>)<\/span>;<\/span>
\n if<\/span> (<\/span>login)<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u6210\u529f\u767b\u5f55\u5230 FTP \u670d\u52a1\u5668"<\/span>)<\/span>;<\/span>
\n \/\/ \u5728\u8fd9\u91cc\u53ef\u4ee5\u8fdb\u884c\u540e\u7eed\u7684 FTP \u64cd\u4f5c<\/span>
\n }<\/span> else<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u767b\u5f55\u5931\u8d25"<\/span>)<\/span>;<\/span>
\n }<\/span>
\n }<\/span> catch<\/span> (<\/span>SocketException<\/span> e)<\/span> {<\/span>
\n e.<\/span>printStackTrace<\/span>(<\/span>)<\/span>;<\/span>
\n }<\/span> catch<\/span> (<\/span>IOException<\/span> e)<\/span> {<\/span>
\n e.<\/span>printStackTrace<\/span>(<\/span>)<\/span>;<\/span>
\n }<\/span> finally<\/span> {<\/span>
\n \/\/ \u5173\u95ed\u8fde\u63a5<\/span>
\n try<\/span> {<\/span>
\n if<\/span> (<\/span>ftpClient.<\/span>isConnected<\/span>(<\/span>)<\/span>)<\/span> {<\/span>
\n ftpClient.<\/span>logout<\/span>(<\/span>)<\/span>;<\/span>
\n ftpClient.<\/span>disconnect<\/span>(<\/span>)<\/span>;<\/span>
\n }<\/span>
\n }<\/span> catch<\/span> (<\/span>IOException<\/span> e)<\/span> {<\/span>
\n e.<\/span>printStackTrace<\/span>(<\/span>)<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d，\u9996\u5148\u521b\u5efa\u4e86\u4e00\u4e2a FTPClient \u5bf9\u8c61，\u7136\u540e\u6307\u5b9a FTP \u670d\u52a1\u5668\u7684 IP \u5730\u5740\u3001\u7aef\u53e3\u53f7\u3001\u7528\u6237\u540d\u548c\u5bc6\u7801，\u901a\u8fc7 connect \u65b9\u6cd5\u8fde\u63a5\u670d\u52a1\u5668，\u518d\u4f7f\u7528 login \u65b9\u6cd5\u8fdb\u884c\u767b\u5f55\u64cd\u4f5c\u3002\u5982\u679c\u767b\u5f55\u6210\u529f，\u5219\u53ef\u4ee5\u5728\u76f8\u5e94\u7684\u4ee3\u7801\u5757\u4e2d\u8fdb\u884c\u540e\u7eed\u7684 FTP \u64cd\u4f5c\u3002\u6700\u540e，\u65e0\u8bba\u64cd\u4f5c\u662f\u5426\u6210\u529f，\u90fd\u8981\u5728 finally \u5757\u4e2d\u5173\u95ed\u8fde\u63a5，\u4ee5\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n

\u4e09\u3001\u8fde\u63a5\u540e\u5b9e\u7528\u65b9\u6cd5\u4ecb\u7ecd<\/h3>\n

（\u4e00）\u5207\u6362\u5de5\u4f5c\u76ee\u5f55<\/h4>\n

\u4f7f\u7528 changeWorkingDirectory \u65b9\u6cd5\u53ef\u4ee5\u5207\u6362 FTP \u670d\u52a1\u5668\u4e0a\u7684\u5de5\u4f5c\u76ee\u5f55\u3002\u4f8b\u5982：<\/p>\n

boolean<\/span> changeDir =<\/span> ftpClient.<\/span>changeWorkingDirectory<\/span>(<\/span>"\/new\/directory\/path"<\/span>)<\/span>;<\/span>
\nif<\/span> (<\/span>changeDir)<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u6210\u529f\u5207\u6362\u5230\u6307\u5b9a\u76ee\u5f55"<\/span>)<\/span>;<\/span>
\n}<\/span> else<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u5207\u6362\u76ee\u5f55\u5931\u8d25"<\/span>)<\/span>;<\/span>
\n}<\/span><\/p>\n

（\u4e8c）\u5217\u51fa\u76ee\u5f55\u5185\u5bb9<\/h4>\n

listFiles \u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u6307\u5b9a\u76ee\u5f55\u4e0b\u7684\u6587\u4ef6\u5217\u8868\u3002\u4f8b\u5982：<\/p>\n

FTPFile<\/span>[<\/span>]<\/span> files =<\/span> ftpClient.<\/span>listFiles<\/span>(<\/span>)<\/span>;<\/span>
\nfor<\/span> (<\/span>FTPFile<\/span> file :<\/span> files)<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>file.<\/span>getName<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
\n}<\/span><\/p>\n

\u8fd9\u5c06\u6253\u5370\u51fa\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\u4e0b\u6240\u6709\u6587\u4ef6\u7684\u540d\u79f0\u3002\u5982\u679c\u60f3\u8981\u5217\u51fa\u6307\u5b9a\u76ee\u5f55\u4e0b\u7684\u6587\u4ef6，\u53ef\u4ee5\u5148\u5207\u6362\u5230\u8be5\u76ee\u5f55，\u518d\u8c03\u7528 listFiles \u65b9\u6cd5\u3002<\/p>\n

（\u4e09）\u4e0a\u4f20\u6587\u4ef6<\/h4>\n

storeFile \u65b9\u6cd5\u7528\u4e8e\u5c06\u672c\u5730\u6587\u4ef6\u4e0a\u4f20\u5230 FTP \u670d\u52a1\u5668\u3002\u4f8b\u5982：<\/p>\n

File<\/span> localFile =<\/span> new<\/span> File<\/span>(<\/span>"path\/to\/local\/file.txt"<\/span>)<\/span>;<\/span>
\nInputStream<\/span> inputStream =<\/span> new<\/span> FileInputStream<\/span>(<\/span>localFile)<\/span>;<\/span>
\nboolean<\/span> upload =<\/span> ftpClient.<\/span>storeFile<\/span>(<\/span>"remote_file_name.txt"<\/span>,<\/span> inputStream)<\/span>;<\/span>
\nif<\/span> (<\/span>upload)<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u6587\u4ef6\u4e0a\u4f20\u6210\u529f"<\/span>)<\/span>;<\/span>
\n}<\/span> else<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u6587\u4ef6\u4e0a\u4f20\u5931\u8d25"<\/span>)<\/span>;<\/span>
\n}<\/span>
\ninputStream.<\/span>close<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

\u5728\u4e0a\u4f20\u6587\u4ef6\u4e4b\u524d，\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u672c\u5730\u6587\u4ef6\u7684\u8f93\u5165\u6d41，\u5e76\u5c06\u5176\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9 storeFile \u65b9\u6cd5，\u540c\u65f6\u6307\u5b9a\u4e0a\u4f20\u540e\u7684\u6587\u4ef6\u540d\u3002<\/p>\n

（\u56db）\u4e0b\u8f7d\u6587\u4ef6<\/h4>\n

retrieveFile \u65b9\u6cd5\u7528\u4e8e\u4ece FTP \u670d\u52a1\u5668\u4e0b\u8f7d\u6587\u4ef6\u5230\u672c\u5730\u3002\u4f8b\u5982：<\/p>\n

OutputStream<\/span> outputStream =<\/span> new<\/span> FileOutputStream<\/span>(<\/span>"path\/to\/local\/downloaded_file.txt"<\/span>)<\/span>;<\/span>
\nboolean<\/span> download =<\/span> ftpClient.<\/span>retrieveFile<\/span>(<\/span>"remote_file.txt"<\/span>,<\/span> outputStream)<\/span>;<\/span>
\nif<\/span> (<\/span>download)<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u6587\u4ef6\u4e0b\u8f7d\u6210\u529f"<\/span>)<\/span>;<\/span>
\n}<\/span> else<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u6587\u4ef6\u4e0b\u8f7d\u5931\u8d25"<\/span>)<\/span>;<\/span>
\n}<\/span>
\noutputStream.<\/span>close<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u672c\u5730\u6587\u4ef6\u7684\u8f93\u51fa\u6d41，\u7528\u4e8e\u63a5\u6536\u4e0b\u8f7d\u7684\u6587\u4ef6\u5185\u5bb9\u3002<\/p>\n

（\u4e94）\u83b7\u53d6\u6587\u4ef6\u7684\u6700\u8fd1\u4fee\u6539\u65f6\u95f4<\/h4>\n

\u8981\u83b7\u53d6 FTP \u670d\u52a1\u5668\u4e0a\u6587\u4ef6\u7684\u6700\u8fd1\u4fee\u6539\u65f6\u95f4，\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5：<\/p>\n

FTPFile<\/span>[<\/span>]<\/span> files =<\/span> ftpClient.<\/span>listFiles<\/span>(<\/span>)<\/span>;<\/span>
\nfor<\/span> (<\/span>FTPFile<\/span> file :<\/span> files)<\/span> {<\/span>
\n long<\/span> lastModified =<\/span> file.<\/span>getTimestamp<\/span>(<\/span>)<\/span>.<\/span>getTimeInMillis<\/span>(<\/span>)<\/span>;<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u6587\u4ef6 "<\/span> +<\/span> file.<\/span>getName<\/span>(<\/span>)<\/span> +<\/span> " \u7684\u6700\u8fd1\u4fee\u6539\u65f6\u95f4："<\/span> +<\/span> new<\/span> Date<\/span>(<\/span>lastModified)<\/span>)<\/span>;<\/span>
\n}<\/span><\/p>\n

\u8fd9\u91cc\u901a\u8fc7 listFiles \u65b9\u6cd5\u83b7\u53d6\u6587\u4ef6\u5217\u8868\u540e，\u5bf9\u6bcf\u4e2a\u6587\u4ef6\u8c03\u7528 getTimestamp \u65b9\u6cd5\u83b7\u53d6\u5176\u65f6\u95f4\u6233\u4fe1\u606f，\u518d\u8f6c\u6362\u4e3a java.util.Date \u7c7b\u578b\u4ee5\u4fbf\u66f4\u76f4\u89c2\u5730\u663e\u793a\u3002<\/p>\n

\u56db\u3001\u6ce8\u610f\u4e8b\u9879\u4e0e\u4f18\u5316<\/h3>\n

（\u4e00）\u5f02\u5e38\u5904\u7406<\/h4>\n

\u5728\u8fdb\u884c FTP \u64cd\u4f5c\u65f6，\u53ef\u80fd\u4f1a\u9047\u5230\u5404\u79cd\u5f02\u5e38\u60c5\u51b5，\u5982\u7f51\u7edc\u8fde\u63a5\u4e2d\u65ad\u3001\u6743\u9650\u4e0d\u8db3\u7b49\u3002\u56e0\u6b64，\u9700\u8981\u5bf9 IOException \u7b49\u5f02\u5e38\u8fdb\u884c\u5168\u9762\u7684\u5904\u7406，\u4ee5\u786e\u4fdd\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n

（\u4e8c）\u8fde\u63a5\u8d85\u65f6\u8bbe\u7f6e<\/h4>\n

\u53ef\u4ee5\u901a\u8fc7 setConnectTimeout \u65b9\u6cd5\u8bbe\u7f6e\u8fde\u63a5\u8d85\u65f6\u65f6\u95f4，\u907f\u514d\u957f\u65f6\u95f4\u7b49\u5f85\u8fde\u63a5\u5bfc\u81f4\u7a0b\u5e8f\u963b\u585e\u3002\u4f8b\u5982：<\/p>\n

ftpClient.<\/span>setConnectTimeout<\/span>(<\/span>5000<\/span>)<\/span>;<\/span> \/\/ \u8bbe\u7f6e\u8fde\u63a5\u8d85\u65f6\u65f6\u95f4\u4e3a 5 \u79d2<\/span><\/p>\n

（\u4e09）\u88ab\u52a8\u6a21\u5f0f\u4e0e\u4e3b\u52a8\u6a21\u5f0f<\/h4>\n

FTP \u6709\u88ab\u52a8\u6a21\u5f0f\u548c\u4e3b\u52a8\u6a21\u5f0f\u4e4b\u5206\u3002\u5728\u67d0\u4e9b\u7f51\u7edc\u73af\u5883\u4e0b，\u88ab\u52a8\u6a21\u5f0f\u53ef\u80fd\u66f4\u9002\u5408\u3002\u53ef\u4ee5\u4f7f\u7528 enterLocalPassiveMode \u65b9\u6cd5\u8bbe\u7f6e\u4e3a\u88ab\u52a8\u6a21\u5f0f，\u5982：<\/p>\n

ftpClient.<\/span>enterLocalPassiveMode<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

\u4e94\u3001\u603b\u7ed3<\/h3>\n

\u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd，\u6211\u4eec\u8be6\u7ec6\u4e86\u89e3\u4e86\u5982\u4f55\u4f7f\u7528 Java \u8fde\u63a5 FTP \u670d\u52a1\u5668\u4ee5\u53ca\u8fde\u63a5\u6210\u529f\u540e\u4e00\u7cfb\u5217\u5b9e\u7528\u7684\u64cd\u4f5c\u65b9\u6cd5\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d，\u6839\u636e\u5177\u4f53\u7684\u4e1a\u52a1\u9700\u6c42，\u53ef\u4ee5\u7075\u6d3b\u8fd0\u7528\u8fd9\u4e9b\u65b9\u6cd5\u6765\u5b9e\u73b0\u9ad8\u6548\u7684 FTP \u4ea4\u4e92\u529f\u80fd\u3002\u540c\u65f6，\u8981\u6ce8\u610f\u5f02\u5e38\u5904\u7406\u3001\u8fde\u63a5\u8d85\u65f6\u8bbe\u7f6e\u4ee5\u53ca\u6a21\u5f0f\u9009\u62e9\u7b49\u7ec6\u8282，\u4ee5\u786e\u4fdd\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\u548c\u6027\u80fd\u3002\u5e0c\u671b\u672c\u6587\u80fd\u591f\u5e2e\u52a9\u5e7f\u5927 Java \u5f00\u53d1\u8005\u66f4\u597d\u5730\u638c\u63e1 Java \u4e0e FTP \u670d\u52a1\u5668\u7684\u8fde\u63a5\u4e0e\u64cd\u4f5c\u6280\u672f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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