{"id":26457,"date":"2024-03-17T07:11:39","date_gmt":"2024-03-16T22:11:39","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bfileupload%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%e3%80%82\/"},"modified":"2024-03-22T13:54:39","modified_gmt":"2024-03-22T04:54:39","slug":"java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bfileupload%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bfileupload%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%e3%80%82\/","title":{"rendered":"Java\u306b\u304a\u3051\u308bfileupload\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\u3002"},"content":{"rendered":"<p>Java\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308b\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u306f\u3001Apache Commons FileUpload\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001FileUpload\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.io.File;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.IOException;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.PrintWriter;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.List;\r\n\r\n<span class=\"hljs-keyword\">import<\/span> javax.servlet.ServletException;\r\n<span class=\"hljs-keyword\">import<\/span> javax.servlet.annotation.MultipartConfig;\r\n<span class=\"hljs-keyword\">import<\/span> javax.servlet.annotation.WebServlet;\r\n<span class=\"hljs-keyword\">import<\/span> javax.servlet.http.HttpServlet;\r\n<span class=\"hljs-keyword\">import<\/span> javax.servlet.http.HttpServletRequest;\r\n<span class=\"hljs-keyword\">import<\/span> javax.servlet.http.HttpServletResponse;\r\n<span class=\"hljs-keyword\">import<\/span> javax.servlet.http.Part;\r\n\r\n<span class=\"hljs-keyword\">import<\/span> org.apache.commons.fileupload.FileItem;\r\n<span class=\"hljs-keyword\">import<\/span> org.apache.commons.fileupload.disk.DiskFileItemFactory;\r\n<span class=\"hljs-keyword\">import<\/span> org.apache.commons.fileupload.servlet.ServletFileUpload;\r\n\r\n<span class=\"hljs-meta\">@WebServlet(\"\/fileUpload\")<\/span>\r\n<span class=\"hljs-meta\">@MultipartConfig<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">FileUploadServlet<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title class_\">HttpServlet<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">long<\/span> <span class=\"hljs-variable\">serialVersionUID<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">1L<\/span>;\r\n    \r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">UPLOAD_DIRECTORY<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"uploads\"<\/span>;\r\n    \r\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">doPost<\/span><span class=\"hljs-params\">(HttpServletRequest request, HttpServletResponse response)<\/span>\r\n            <span class=\"hljs-keyword\">throws<\/span> ServletException, IOException {\r\n        <span class=\"hljs-comment\">\/\/ \u68c0\u67e5\u662f\u5426\u4e3a\u6587\u4ef6\u4e0a\u4f20\u8bf7\u6c42<\/span>\r\n        <span class=\"hljs-keyword\">if<\/span> (!ServletFileUpload.isMultipartContent(request)) {\r\n            <span class=\"hljs-type\">PrintWriter<\/span> <span class=\"hljs-variable\">writer<\/span> <span class=\"hljs-operator\">=<\/span> response.getWriter();\r\n            writer.println(<span class=\"hljs-string\">\"\u8bf7\u6c42\u4e0d\u662f\u6587\u4ef6\u4e0a\u4f20\u8bf7\u6c42\"<\/span>);\r\n            writer.flush();\r\n            <span class=\"hljs-keyword\">return<\/span>;\r\n        }\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u914d\u7f6e\u4e0a\u4f20\u53c2\u6570<\/span>\r\n        <span class=\"hljs-type\">DiskFileItemFactory<\/span> <span class=\"hljs-variable\">factory<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">DiskFileItemFactory<\/span>();\r\n        factory.setSizeThreshold(<span class=\"hljs-number\">1024<\/span> * <span class=\"hljs-number\">1024<\/span>); <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u5185\u5b58\u7f13\u51b2\u533a\u5927\u5c0f<\/span>\r\n        factory.setRepository(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">File<\/span>(System.getProperty(<span class=\"hljs-string\">\"java.io.tmpdir\"<\/span>))); <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u4e34\u65f6\u76ee\u5f55<\/span>\r\n        \r\n        <span class=\"hljs-type\">ServletFileUpload<\/span> <span class=\"hljs-variable\">upload<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ServletFileUpload<\/span>(factory);\r\n        upload.setFileSizeMax(<span class=\"hljs-number\">1024<\/span> * <span class=\"hljs-number\">1024<\/span> * <span class=\"hljs-number\">10<\/span>); <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u6700\u5927\u6587\u4ef6\u5927\u5c0f<\/span>\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u83b7\u53d6\u4e0a\u4f20\u6587\u4ef6\u76ee\u5f55\u7684\u771f\u5b9e\u8def\u5f84<\/span>\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">uploadPath<\/span> <span class=\"hljs-operator\">=<\/span> getServletContext().getRealPath(<span class=\"hljs-string\">\"\"<\/span>) + File.separator + UPLOAD_DIRECTORY;\r\n        \r\n        <span class=\"hljs-type\">File<\/span> <span class=\"hljs-variable\">uploadDir<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">File<\/span>(uploadPath);\r\n        <span class=\"hljs-keyword\">if<\/span> (!uploadDir.exists()) {\r\n            uploadDir.mkdir(); <span class=\"hljs-comment\">\/\/ \u5982\u679c\u76ee\u5f55\u4e0d\u5b58\u5728\uff0c\u5219\u521b\u5efa<\/span>\r\n        }\r\n        \r\n        <span class=\"hljs-keyword\">try<\/span> {\r\n            List&lt;FileItem&gt; formItems = upload.parseRequest(request);\r\n            \r\n            <span class=\"hljs-keyword\">if<\/span> (formItems != <span class=\"hljs-literal\">null<\/span> &amp;&amp; formItems.size() &gt; <span class=\"hljs-number\">0<\/span>) {\r\n                <span class=\"hljs-comment\">\/\/ \u8fed\u4ee3\u5904\u7406\u4e0a\u4f20\u7684\u6587\u4ef6<\/span>\r\n                <span class=\"hljs-keyword\">for<\/span> (FileItem item : formItems) {\r\n                    <span class=\"hljs-keyword\">if<\/span> (!item.isFormField()) { <span class=\"hljs-comment\">\/\/ \u5ffd\u7565\u975e\u6587\u4ef6\u5b57\u6bb5<\/span>\r\n                        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">fileName<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">File<\/span>(item.getName()).getName();\r\n                        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">filePath<\/span> <span class=\"hljs-operator\">=<\/span> uploadPath + File.separator + fileName;\r\n                        <span class=\"hljs-type\">File<\/span> <span class=\"hljs-variable\">storeFile<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">File<\/span>(filePath);\r\n                        \r\n                        <span class=\"hljs-comment\">\/\/ \u4fdd\u5b58\u6587\u4ef6\u5230\u786c\u76d8<\/span>\r\n                        item.write(storeFile);\r\n                    }\r\n                }\r\n                \r\n                request.setAttribute(<span class=\"hljs-string\">\"message\"<\/span>, <span class=\"hljs-string\">\"\u6587\u4ef6\u4e0a\u4f20\u6210\u529f\"<\/span>);\r\n            }\r\n        } <span class=\"hljs-keyword\">catch<\/span> (Exception ex) {\r\n            request.setAttribute(<span class=\"hljs-string\">\"message\"<\/span>, <span class=\"hljs-string\">\"\u6587\u4ef6\u4e0a\u4f20\u5931\u8d25: \"<\/span> + ex.getMessage());\r\n        }\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u8f6c\u53d1\u5230\u7ed3\u679c\u9875\u9762<\/span>\r\n        getServletContext().getRequestDispatcher(<span class=\"hljs-string\">\"\/message.jsp\"<\/span>).forward(request, response);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001doPost\uff08\uff09\u30e1\u30bd\u30c3\u30c9\u304c\u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9POST\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305a\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30ea\u30af\u30a8\u30b9\u30c8\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u4e00\u6642\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3084\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u5236\u9650\u306a\u3069\u306e\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306b\u3001upload.parseRequest(request)\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u89e3\u6790\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u9805\u76ee\u306e\u30ea\u30b9\u30c8\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30d5\u30a1\u30a4\u30eb\u9805\u76ee\u3092\u53cd\u5fa9\u51e6\u7406\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u4ee5\u5916\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u7121\u8996\u3057\u3066\u3001\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u3092\u6307\u5b9a\u3055\u308c\u305f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/p>\n<p>\u6700\u5f8c\u306b\u3001\u7d50\u679c\u306e\u60c5\u5831\u3092\u30ea\u30af\u30a8\u30b9\u30c8\u5c5e\u6027\u306b\u4fdd\u5b58\u3057\u3066\u3001\u305d\u306e\u5f8c\u7d50\u679c\u30da\u30fc\u30b8\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u8ee2\u9001\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306f\u5358\u306a\u308b\u7c21\u5358\u306a\u4f8b\u3067\u3059\u306e\u3067\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304c\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3055\u3089\u306b\u30a8\u30e9\u30fc\u51e6\u7406\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30c1\u30a7\u30c3\u30af\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308b\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u306f\u3001Apache Commons FileUpload\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001FileUpload\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002  [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-26457","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u306b\u304a\u3051\u308bfileupload\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\u3002 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306b\u304a\u3051\u308bfileupload\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u306b\u304a\u3051\u308bfileupload\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\u3002\" \/>\n<meta property=\"og:description\" content=\"Java\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308b\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u306f\u3001Apache Commons FileUpload\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001FileUpload\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306b\u304a\u3051\u308bfileupload\u306e\u4f7f\u7528\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-16T22:11:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-22T04:54:39+00:00\" \/>\n<meta name=\"author\" content=\"\u590f\u6a39, \u98a8\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u590f\u6a39, 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