{"id":115474,"date":"2024-03-23T02:54:42","date_gmt":"2024-03-22T17:54:42","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e7%94%bb%e5%83%8f%e3%82%92%e3%82%a2%e3%83%83%e3%83%97%e3%83%ad%e3%83%bc%e3%83%89%e3%81%97%e3%81%a6%e8%a1%a8%e7%a4%ba%e3%81%99%e3%82%8b%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86%e3%81%99\/"},"modified":"2024-04-04T06:47:50","modified_gmt":"2024-04-03T21:47:50","slug":"java%e3%81%a7%e7%94%bb%e5%83%8f%e3%82%92%e3%82%a2%e3%83%83%e3%83%97%e3%83%ad%e3%83%bc%e3%83%89%e3%81%97%e3%81%a6%e8%a1%a8%e7%a4%ba%e3%81%99%e3%82%8b%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86%e3%81%99","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e7%94%bb%e5%83%8f%e3%82%92%e3%82%a2%e3%83%83%e3%83%97%e3%83%ad%e3%83%bc%e3%83%89%e3%81%97%e3%81%a6%e8%a1%a8%e7%a4%ba%e3%81%99%e3%82%8b%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86%e3%81%99\/","title":{"rendered":"java\u3067\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u3066\u8868\u793a\u3059\u308b\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\u3002"},"content":{"rendered":"<p>Java \u8a00\u8a9e\u3067\u753b\u50cf\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3068\u8868\u793a\u3092\u5b9f\u88c5\u3059\u308b\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u306f Servlet \u3068 JSP \u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u753b\u50cf\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b<\/li>\n<\/ol>\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.nio.file.Files;\r\n<span class=\"hljs-keyword\">import<\/span> java.nio.file.Path;\r\n<span class=\"hljs-keyword\">import<\/span> java.nio.file.StandardCopyOption;\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-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    <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\">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\">\/\/ \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        \r\n        <span class=\"hljs-comment\">\/\/ \u6307\u5b9a\u5b58\u50a8\u4e0a\u4f20\u6587\u4ef6\u7684\u76ee\u5f55<\/span>\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">uploadDir<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"C:\/upload\"<\/span>;\r\n        <span class=\"hljs-type\">Path<\/span> <span class=\"hljs-variable\">filePath<\/span> <span class=\"hljs-operator\">=<\/span> Paths.get(uploadDir, fileName);\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u5c06\u6587\u4ef6\u590d\u5236\u5230\u6307\u5b9a\u76ee\u5f55<\/span>\r\n        <span class=\"hljs-keyword\">try<\/span> (<span class=\"hljs-type\">InputStream<\/span> <span class=\"hljs-variable\">fileContent<\/span> <span class=\"hljs-operator\">=<\/span> filePart.getInputStream()) {\r\n            Files.copy(fileContent, filePath, StandardCopyOption.REPLACE_EXISTING);\r\n        }\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u5c06\u4e0a\u4f20\u7684\u6587\u4ef6\u8def\u5f84\u5b58\u50a8\u5728request\u5c5e\u6027\u4e2d\uff0c\u4f9bJSP\u4f7f\u7528<\/span>\r\n        request.setAttribute(<span class=\"hljs-string\">\"filePath\"<\/span>, filePath.toString());\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u8f6c\u53d1\u5230\u663e\u793a\u4e0a\u4f20\u6587\u4ef6\u7684JSP\u9875\u9762<\/span>\r\n        request.getRequestDispatcher(<span class=\"hljs-string\">\"display.jsp\"<\/span>).forward(request, response);\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u305f\u753b\u50cf\u3092\u8868\u793a\u3059\u308bJSP\u30da\u30fc\u30b8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>&lt;%@ page language=<span class=\"hljs-string\">\"java\"<\/span> contentType=<span class=\"hljs-string\">\"text\/html; charset=UTF-8\"<\/span> pageEncoding=<span class=\"hljs-string\">\"UTF-8\"<\/span>%&gt;\r\n&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n&lt;head&gt;\r\n&lt;meta charset=<span class=\"hljs-string\">\"UTF-8\"<\/span>&gt;\r\n&lt;title&gt;Display Image&lt;\/title&gt;\r\n&lt;\/head&gt;\r\n&lt;body&gt;\r\n    &lt;h1&gt;Uploaded Image&lt;\/h1&gt;\r\n    &lt;img src=<span class=\"hljs-string\">\"${filePath}\"<\/span> alt=<span class=\"hljs-string\">\"Uploaded Image\"<\/span>&gt;\r\n&lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/code><\/pre>\n<p>JSP\u30da\u30fc\u30b8\u306b\u304a\u3051\u308b${filePath}\u306f\u3001\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u3067\u8a2d\u5b9a\u3057\u305f\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u306e\u5024\u306b\u7f6e\u63db\u3055\u308c\u308bEL\u5f0f\u3067\u3059\u3002<\/p>\n<ol>\n<li>Servlet\u306b\u3088\u308bweb.xml\u8a2d\u5b9a\u306e\u5834\u5408\u3001web.xml\u30d5\u30a1\u30a4\u30eb\u3092\u914d\u7f6e\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">&lt;?xml version=<span class=\"hljs-string\">\"1.0\"<\/span> encoding=<span class=\"hljs-string\">\"UTF-8\"<\/span>?&gt;<\/span>\r\n<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">web-app<\/span> <span class=\"hljs-attr\">xmlns:xsi<\/span>=<span class=\"hljs-string\">\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"<\/span>\r\n    <span class=\"hljs-attr\">xmlns<\/span>=<span class=\"hljs-string\">\"http:\/\/java.sun.com\/xml\/ns\/javaee\"<\/span>\r\n    <span class=\"hljs-attr\">xsi:schemaLocation<\/span>=<span class=\"hljs-string\">\"http:\/\/java.sun.com\/xml\/ns\/javaee http:\/\/java.sun.com\/xml\/ns\/javaee\/web-app_4_0.xsd\"<\/span>\r\n    <span class=\"hljs-attr\">id<\/span>=<span class=\"hljs-string\">\"WebApp_ID\"<\/span> <span class=\"hljs-attr\">version<\/span>=<span class=\"hljs-string\">\"4.0\"<\/span>&gt;<\/span>\r\n    \r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">display-name<\/span>&gt;<\/span>ImageUpload<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">display-name<\/span>&gt;<\/span>\r\n    \r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">servlet<\/span>&gt;<\/span>\r\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">servlet-name<\/span>&gt;<\/span>UploadServlet<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">servlet-name<\/span>&gt;<\/span>\r\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">servlet-class<\/span>&gt;<\/span>com.example.UploadServlet<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">servlet-class<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">servlet<\/span>&gt;<\/span>\r\n    \r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">servlet-mapping<\/span>&gt;<\/span>\r\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">servlet-name<\/span>&gt;<\/span>UploadServlet<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">servlet-name<\/span>&gt;<\/span>\r\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">url-pattern<\/span>&gt;<\/span>\/upload<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">url-pattern<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">servlet-mapping<\/span>&gt;<\/span>\r\n    \r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">welcome-file-list<\/span>&gt;<\/span>\r\n        <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">welcome-file<\/span>&gt;<\/span>index.jsp<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">welcome-file<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">welcome-file-list<\/span>&gt;<\/span>\r\n    \r\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">web-app<\/span>&gt;<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u306fC:\/upload\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3053\u306e\u30b3\u30fc\u30c9\u90e8\u5206\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u969b\u306e\u4f7f\u7528\u4f8b\u3067\u306f\u3001\u3055\u3089\u306b\u591a\u304f\u306e\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u8003\u616e\u304c\u5fc5\u8981\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u8a00\u8a9e\u3067\u753b\u50cf\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3068\u8868\u793a\u3092\u5b9f\u88c5\u3059\u308b\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u306f Servlet \u3068 JSP \u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002 \u753b\u50cf\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b  [&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-115474","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) - 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\u8a00\u8a9e\u3067\u753b\u50cf\u306e\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3068\u8868\u793a\u3092\u5b9f\u88c5\u3059\u308b\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u306f Servlet \u3068 JSP \u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002 \u753b\u50cf\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u3067\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u3066\u8868\u793a\u3059\u308b\u306b\u306f\u3069\u3046\u3059\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-22T17:54:42+00:00\" \/>\n<meta property=\"article:modified_time\" 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