{"id":38243,"date":"2025-05-20T07:11:11","date_gmt":"2025-05-19T23:11:11","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/38243.html"},"modified":"2025-05-20T07:11:11","modified_gmt":"2025-05-19T23:11:11","slug":"%e9%98%b2%e8%8c%83java%e5%ba%94%e7%94%a8%e4%b8%ad%e7%9a%84%e6%81%b6%e6%84%8f%e6%96%87%e4%bb%b6%e4%b8%8a%e4%bc%a0%ef%bc%9a%e7%a1%ae%e4%bf%9d%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%9a%84%e5%ae%89%e5%85%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/38243.html","title":{"rendered":"\u9632\u8303Java\u5e94\u7528\u4e2d\u7684\u6076\u610f\u6587\u4ef6\u4e0a\u4f20\uff1a\u786e\u4fdd\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027"},"content":{"rendered":"<h2>\u9632\u8303Java\u5e94\u7528\u4e2d\u7684\u6076\u610f\u6587\u4ef6\u4e0a\u4f20&#xff1a;\u786e\u4fdd\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027<\/h2>\n<p>\u5728\u5f53\u4eca\u6570\u5b57\u5316\u65f6\u4ee3&#xff0c;Java 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&#xff1a;\u4ec5\u5141\u8bb8\u4e0a\u4f20\u5df2\u660e\u786e\u5217\u51fa\u7684\u767d\u540d\u5355\u6587\u4ef6\u7c7b\u578b&#xff0c;\u5982\u5e38\u89c1\u7684\u56fe\u7247\u683c\u5f0f&#xff08;.jpg\u3001.png&#xff09;\u3001\u6587\u6863\u683c\u5f0f&#xff08;.doc\u3001.pdf&#xff09;\u7b49\u3002\u907f\u514d\u4f7f\u7528\u9ed1\u540d\u5355\u9a8c\u8bc1&#xff0c;\u56e0\u4e3a\u653b\u51fb\u8005\u53ef\u80fd\u4f1a\u627e\u5230\u65b0\u7684\u6587\u4ef6\u7c7b\u578b\u8fdb\u884c\u653b\u51fb\u3002<\/li>\n<li>\u4ee3\u7801\u793a\u4f8b&#xff1a;\u6587\u4ef6\u7c7b\u578b\u9a8c\u8bc1<\/li>\n<\/ul>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>springframework<span class=\"token punctuation\">.<\/span>web<span class=\"token punctuation\">.<\/span>multipart<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">MultipartFile<\/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\">FileUploadUtil<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Set<\/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> ALLOWED_IMAGE_EXTENSIONS <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">HashSet<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Arrays<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">asList<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;jpg&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;jpeg&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;png&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;gif&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">isAllowedImageFile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">MultipartFile<\/span> file<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>file <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token keyword\">null<\/span> <span class=\"token operator\">||<\/span> file<span class=\"token punctuation\">.<\/span><span class=\"token function\">isEmpty<\/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 keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> fileExtension <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">getFileExtension<\/span><span class=\"token punctuation\">(<\/span>file<span class=\"token punctuation\">.<\/span><span class=\"token function\">getOriginalFilename<\/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 keyword\">return<\/span> ALLOWED_IMAGE_EXTENSIONS<span class=\"token punctuation\">.<\/span><span class=\"token function\">contains<\/span><span class=\"token punctuation\">(<\/span>fileExtension<span class=\"token punctuation\">.<\/span><span class=\"token function\">toLowerCase<\/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 keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getFileExtension<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> fileName<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>fileName <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token keyword\">null<\/span> <span class=\"token operator\">||<\/span> fileName<span class=\"token punctuation\">.<\/span><span class=\"token function\">isEmpty<\/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 keyword\">return<\/span> <span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> lastDotIndex <span class=\"token operator\">&#061;<\/span> fileName<span class=\"token punctuation\">.<\/span><span class=\"token function\">lastIndexOf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;.&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>lastDotIndex <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span> <span class=\"token operator\">||<\/span> lastDotIndex <span class=\"token operator\">&#061;&#061;<\/span> fileName<span class=\"token punctuation\">.<\/span><span class=\"token function\">length<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> fileName<span class=\"token punctuation\">.<\/span><span class=\"token function\">substring<\/span><span class=\"token punctuation\">(<\/span>lastDotIndex <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/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<h4>\u68c0\u67e5\u6587\u4ef6\u5185\u5bb9<\/h4>\n<ul>\n<li>\u4f7f\u7528\u6587\u4ef6\u7b7e\u540d\u68c0\u67e5 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punctuation\">.<\/span>tika<span class=\"token punctuation\">.<\/span>metadata<\/span> <span class=\"token class-name\">Metadata<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>apache<span class=\"token punctuation\">.<\/span>tika<span class=\"token punctuation\">.<\/span>mime<\/span> <span class=\"token class-name\">MimeTypeException<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>apache<span class=\"token punctuation\">.<\/span>tika<span class=\"token punctuation\">.<\/span>mime<\/span> <span class=\"token class-name\">MimeTypes<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>springframework<span class=\"token punctuation\">.<\/span>web<span class=\"token punctuation\">.<\/span>multipart<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">MultipartFile<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">import<\/span> <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 class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">InputStream<\/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\">FileContentTypeValidator<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">MimeTypes<\/span> MIME_TYPES <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">MimeTypes<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getDefaultMimeTypes<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Set<\/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> ALLOWED_MIME_TYPES <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">HashSet<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Arrays<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">asList<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            <span class=\"token string\">&#034;image\/jpeg&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;image\/png&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;application\/pdf&#034;<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">boolean<\/span> <span class=\"token function\">isValidContentType<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">MultipartFile<\/span> file<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\">InputStream<\/span> inputStream <span class=\"token operator\">&#061;<\/span> file<span class=\"token punctuation\">.<\/span><span class=\"token function\">getInputStream<\/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\">Detector<\/span> detector <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">MimeTypesDetector<\/span><span class=\"token punctuation\">(<\/span>MIME_TYPES<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">Metadata<\/span> metadata <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Metadata<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">String<\/span> mimeType <span class=\"token operator\">&#061;<\/span> detector<span class=\"token punctuation\">.<\/span><span class=\"token function\">detect<\/span><span class=\"token punctuation\">(<\/span>inputStream<span class=\"token punctuation\">,<\/span> metadata<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> ALLOWED_MIME_TYPES<span class=\"token punctuation\">.<\/span><span class=\"token function\">contains<\/span><span class=\"token punctuation\">(<\/span>mimeType<span class=\"token punctuation\">.<\/span><span class=\"token function\">toLowerCase<\/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 keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">IOException<\/span> <span class=\"token operator\">|<\/span> <span class=\"token class-name\">MimeTypeException<\/span> e<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/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<h4>\u63a7\u5236\u6587\u4ef6\u5b58\u50a8\u8def\u5f84<\/h4>\n<ul>\n<li>\u907f\u514d\u4f7f\u7528\u7528\u6237\u8f93\u5165\u7684\u6587\u4ef6\u540d &#xff1a;\u5bf9\u4e0a\u4f20\u7684\u6587\u4ef6\u8fdb\u884c\u91cd\u547d\u540d&#xff0c;\u4f7f\u7528 UUID \u6216\u5176\u4ed6\u968f\u673a\u751f\u6210\u7684\u6587\u4ef6\u540d&#xff0c;\u4ee5\u9632\u6b62\u8def\u5f84\u904d\u5386\u653b\u51fb\u548c\u6587\u4ef6\u540d\u51b2\u7a81\u3002<\/li>\n<li>\u4ee3\u7801\u793a\u4f8b&#xff1a;\u5b89\u5168\u7684\u6587\u4ef6\u5b58\u50a8<\/li>\n<\/ul>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>io<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">File<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <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 class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>util<span class=\"token punctuation\">.<\/span><\/span>UUID<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <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 class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <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 class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <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 class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <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\">StandardCopyOption<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>springframework<span class=\"token punctuation\">.<\/span>web<span class=\"token punctuation\">.<\/span>multipart<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">MultipartFile<\/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\">FileStorageService<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Path<\/span> UPLOAD_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;uploads&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token class-name\">Path<\/span> <span class=\"token function\">storeFile<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">MultipartFile<\/span> file<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\">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>UPLOAD_DIR<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\">createDirectories<\/span><span class=\"token punctuation\">(<\/span>UPLOAD_DIR<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> originalFilename <span class=\"token operator\">&#061;<\/span> file<span class=\"token punctuation\">.<\/span><span class=\"token function\">getOriginalFilename<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>originalFilename <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token keyword\">null<\/span> <span class=\"token operator\">||<\/span> originalFilename<span class=\"token punctuation\">.<\/span><span class=\"token function\">isEmpty<\/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 keyword\">return<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> fileExtension <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">getFileExtension<\/span><span class=\"token punctuation\">(<\/span>originalFilename<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> newFilename <span class=\"token operator\">&#061;<\/span> UUID<span class=\"token punctuation\">.<\/span><span class=\"token function\">randomUUID<\/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 operator\">&#043;<\/span> <span class=\"token string\">&#034;.&#034;<\/span> <span class=\"token operator\">&#043;<\/span> fileExtension<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Path<\/span> filePath <span class=\"token operator\">&#061;<\/span> UPLOAD_DIR<span class=\"token punctuation\">.<\/span><span class=\"token function\">resolve<\/span><span class=\"token punctuation\">(<\/span>newFilename<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>file<span class=\"token punctuation\">.<\/span><span class=\"token function\">getInputStream<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> filePath<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">StandardCopyOption<\/span><span class=\"token punctuation\">.<\/span>REPLACE_EXISTING<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> filePath<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getFileExtension<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> fileName<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4e0e\u4e4b\u524d\u793a\u4f8b\u4e2d\u7684 getFileExtension \u65b9\u6cd5\u7c7b\u4f3c<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u9650\u5236\u6587\u4ef6\u5927\u5c0f<\/h4>\n<ul>\n<li>\u8bbe\u7f6e\u5408\u7406\u7684\u4e0a\u4f20\u6587\u4ef6\u5927\u5c0f\u9650\u5236 &#xff1a;\u9632\u6b62\u653b\u51fb\u8005\u4e0a\u4f20\u8fc7\u5927\u7684\u6587\u4ef6&#xff0c;\u5360\u7528\u670d\u52a1\u5668\u5b58\u50a8\u7a7a\u95f4\u6216\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u653b\u51fb&#xff08;DoS&#xff09;\u3002<\/li>\n<\/ul>\n<p><span class=\"token comment\">\/\/ \u5728 Spring Boot \u5e94\u7528\u4e2d&#xff0c;\u53ef\u5728 application.properties \u6587\u4ef6\u4e2d\u8fdb\u884c\u914d\u7f6e<\/span><br \/>\nspring<span class=\"token punctuation\">.<\/span>servlet<span class=\"token punctuation\">.<\/span>multipart<span class=\"token punctuation\">.<\/span>max<span class=\"token operator\">&#8211;<\/span>file<span class=\"token operator\">&#8211;<\/span>size<span class=\"token operator\">&#061;<\/span><span class=\"token number\">10<\/span>MB<br \/>\nspring<span class=\"token punctuation\">.<\/span>servlet<span class=\"token punctuation\">.<\/span>multipart<span class=\"token punctuation\">.<\/span>max<span class=\"token operator\">&#8211;<\/span>request<span class=\"token operator\">&#8211;<\/span>size<span class=\"token operator\">&#061;<\/span><span class=\"token number\">10<\/span>MB<\/p>\n<h4>\u670d\u52a1\u5668\u7aef\u5b89\u5168\u7b56\u7565<\/h4>\n<ul>\n<li>\u7981\u7528\u5371\u9669\u7684 HTTP \u65b9\u6cd5 &#xff1a;\u5982 PUT\u3001DELETE \u7b49&#xff0c;\u5982\u679c\u5e94\u7528\u4e0d\u9700\u8981\u8fd9\u4e9b\u65b9\u6cd5&#xff0c;\u5e94\u5c06\u5176\u7981\u7528&#xff0c;\u4ee5\u51cf\u5c11\u653b\u51fb\u9762\u3002<\/li>\n<li>\u8bbe\u7f6e\u5b89\u5168\u7684 MIME \u7c7b\u578b &#xff1a;\u786e\u4fdd\u670d\u52a1\u5668\u8fd4\u56de\u6b63\u786e\u7684 MIME \u7c7b\u578b&#xff0c;\u907f\u514d\u6d4f\u89c8\u5668\u5bf9\u6587\u4ef6\u8fdb\u884c\u4e0d\u5b89\u5168\u7684\u89e3\u6790\u3002<\/li>\n<li>\u4ee3\u7801\u793a\u4f8b&#xff1a;\u5728 Spring Boot \u4e2d\u914d\u7f6e\u5b89\u5168\u7b56\u7565<\/li>\n<\/ul>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>springframework<span class=\"token punctuation\">.<\/span>context<span class=\"token punctuation\">.<\/span>annotation<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Configuration<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>springframework<span class=\"token punctuation\">.<\/span>web<span class=\"token punctuation\">.<\/span>servlet<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">.<\/span>annotation<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">WebMvcConfigurer<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>springframework<span class=\"token punctuation\">.<\/span>web<span class=\"token punctuation\">.<\/span>servlet<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">.<\/span>annotation<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">CorsRegistry<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>springframework<span class=\"token punctuation\">.<\/span>security<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">.<\/span>annotation<span class=\"token punctuation\">.<\/span>web<span class=\"token punctuation\">.<\/span>builders<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">HttpSecurity<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>springframework<span class=\"token punctuation\">.<\/span>security<span class=\"token punctuation\">.<\/span>web<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">SecurityFilterChain<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token annotation punctuation\">&#064;Configuration<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">SecurityConfig<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">WebMvcConfigurer<\/span> <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 keyword\">void<\/span> <span class=\"token function\">addCorsMappings<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">CorsRegistry<\/span> registry<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        registry<span class=\"token punctuation\">.<\/span><span class=\"token function\">addMapping<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/**&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">allowedMethods<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;GET&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;POST&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;OPTIONS&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">allowedOrigins<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;*&#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 annotation punctuation\">&#064;Bean<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">SecurityFilterChain<\/span> <span class=\"token function\">securityFilterChain<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">HttpSecurity<\/span> http<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">Exception<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        http<br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">csrf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">disable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">authorizeRequests<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">antMatchers<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/api\/file\/upload&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">permitAll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">anyRequest<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">authenticated<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">and<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">httpBasic<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> http<span class=\"token punctuation\">.<\/span><span class=\"token function\">build<\/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<h3>\u603b\u7ed3\u4e0e\u5c55\u671b<\/h3>\n<p>\u9632\u8303 Java 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