{"id":90888,"date":"2024-03-21T13:07:25","date_gmt":"2024-03-21T04:07:25","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%a2%e3%83%83%e3%83%97%e3%83%ad%e3%83%bc%e3%83%89%e6%a9%9f%e8%83%bd%e3%81%ae%e5%ae%9f%e8%a3%85\/"},"modified":"2024-04-04T20:07:34","modified_gmt":"2024-04-04T11:07:34","slug":"java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%a2%e3%83%83%e3%83%97%e3%83%ad%e3%83%bc%e3%83%89%e6%a9%9f%e8%83%bd%e3%81%ae%e5%ae%9f%e8%a3%85","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%a2%e3%83%83%e3%83%97%e3%83%ad%e3%83%bc%e3%83%89%e6%a9%9f%e8%83%bd%e3%81%ae%e5%ae%9f%e8%a3%85\/","title":{"rendered":"Java\u306b\u304a\u3051\u308b\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u6a5f\u80fd\u306e\u5b9f\u88c5"},"content":{"rendered":"<p>Java \u3067\u306f\u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u6a5f\u80fd\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u79c1\u306f\u3053\u306e\u6620\u753b\u306f\u597d\u304d\u3058\u3083\u306a\u304b\u3063\u305f\u3067\u3059\u3002<\/li>\n<li>\u5143\u7d20<\/li>\n<li>\u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308bServlet\u307e\u305f\u306fController\u30af\u30e9\u30b9\u3092Java\u30b5\u30fc\u30d0\u30b5\u30a4\u30c9\u306b\u4f5c\u6210\u3059\u308b\u3002<\/li>\n<li>getPart() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u307e\u305f\u306f\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30af\u30e9\u30b9\u3067 HttpServletRequest \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u90e8\u5206\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/li>\n<li>Part\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306egetOriginalFilename()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3001\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/li>\n<li>Part\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306ewrite()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3001\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30d5\u30a1\u30a4\u30eb\u3092\u30b5\u30fc\u30d0\u306e\u6307\u5b9a\u3055\u308c\u305f\u5834\u6240\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/li>\n<li>\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u5b8c\u4e86\u5f8c\u306b\u30ed\u30b8\u30c3\u30af\u3092\u51e6\u7406\u3059\u308b\u3002\u305f\u3068\u3048\u3070\u3001\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u306b\u6210\u529f\u3057\u305f\u3068\u3044\u3046\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30e6\u30fc\u30b6\u30fc\u306b\u8fd4\u3059\u3002<\/li>\n<\/ol>\n<p>\u7c21\u5358\u306a\u4f8b\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@WebServlet(\"\/upload\")<\/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_\">UploadServlet<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title class_\">HttpServlet<\/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> <span class=\"hljs-keyword\">throws<\/span> ServletException, IOException {\r\n        <span class=\"hljs-comment\">\/\/ \u83b7\u53d6\u4e0a\u4f20\u7684\u6587\u4ef6<\/span>\r\n        <span class=\"hljs-type\">Part<\/span> <span class=\"hljs-variable\">filePart<\/span> <span class=\"hljs-operator\">=<\/span> request.getPart(<span class=\"hljs-string\">\"file\"<\/span>);\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">fileName<\/span> <span class=\"hljs-operator\">=<\/span> filePart.getSubmittedFileName();\r\n        <span class=\"hljs-comment\">\/\/ \u6307\u5b9a\u4e0a\u4f20\u6587\u4ef6\u4fdd\u5b58\u7684\u8def\u5f84<\/span>\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">savePath<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"C:\/uploads\/\"<\/span> + fileName;\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u5c06\u4e0a\u4f20\u6587\u4ef6\u4fdd\u5b58\u5230\u670d\u52a1\u5668\u6307\u5b9a\u8def\u5f84<\/span>\r\n        <span class=\"hljs-keyword\">try<\/span> (<span class=\"hljs-type\">InputStream<\/span> <span class=\"hljs-variable\">inputStream<\/span> <span class=\"hljs-operator\">=<\/span> filePart.getInputStream();\r\n             <span class=\"hljs-type\">FileOutputStream<\/span> <span class=\"hljs-variable\">outputStream<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">FileOutputStream<\/span>(savePath)) {\r\n            <span class=\"hljs-type\">byte<\/span>[] buffer = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">byte<\/span>[<span class=\"hljs-number\">4096<\/span>];\r\n            <span class=\"hljs-type\">int<\/span> bytesRead;\r\n            <span class=\"hljs-keyword\">while<\/span> ((bytesRead = inputStream.read(buffer)) != -<span class=\"hljs-number\">1<\/span>) {\r\n                outputStream.write(buffer, <span class=\"hljs-number\">0<\/span>, bytesRead);\r\n            }\r\n        } <span class=\"hljs-keyword\">catch<\/span> (IOException ex) {\r\n            <span class=\"hljs-comment\">\/\/ \u5904\u7406\u4e0a\u4f20\u6587\u4ef6\u4fdd\u5b58\u5931\u8d25\u7684\u5f02\u5e38<\/span>\r\n        }\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u5904\u7406\u6587\u4ef6\u4e0a\u4f20\u5b8c\u6210\u540e\u7684\u903b\u8f91<\/span>\r\n        response.getWriter().println(<span class=\"hljs-string\">\"\u6587\u4ef6\u4e0a\u4f20\u6210\u529f\uff01\"<\/span>);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001`@WebServlet` \u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u3092 `\/upload` \u30d1\u30b9\u3078\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30d5\u30a1\u30a4\u30eb\u3092\u542b\u3080\u30d5\u30a9\u30fc\u30e0\u3092\u9001\u4fe1\u3059\u308b\u3068\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u3053\u306e\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u3078\u8ee2\u9001\u3055\u308c\u3066\u51e6\u7406\u3055\u308c\u307e\u3059\u3002`doPost()` \u30e1\u30bd\u30c3\u30c9\u5185\u3067\u3001\u6700\u521d\u306b `HttpServletRequest` \u306e `getPart()` \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u90e8\u5206\u3092\u53d6\u5f97\u3057\u3001\u6b21\u306b `Part` \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e `getSubmittedFileName()` \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u7d9a\u3044\u3066\u3001\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u3092\u30b5\u30fc\u30d0\u30fc\u306e\u6307\u5b9a\u3055\u308c\u305f\u30d1\u30b9\u3078\u4fdd\u5b58\u3057\u3001\u6700\u5f8c\u306b\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u6210\u529f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30e6\u30fc\u30b6\u30fc\u3078\u8fd4\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u3067\u306f\u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u6a5f\u80fd\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002 \u79c1\u306f\u3053\u306e\u6620\u753b\u306f\u597d\u304d\u3058\u3083\u306a\u304b\u3063\u305f\u3067\u3059\u3002 \u5143\u7d20 \u30d5\u30a1\u30a4\u30eb\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308bServlet\u307e\u305f\u306fController\u30af\u30e9\u30b9\u3092Java\u30b5\u30fc\u30d0\u30b5 [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-90888","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\/ 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