{"id":564,"date":"2023-01-16T17:33:12","date_gmt":"2023-01-16T09:33:12","guid":{"rendered":"https:\/\/scutvk.cn\/?p=564"},"modified":"2023-01-16T17:33:12","modified_gmt":"2023-01-16T09:33:12","slug":"%e5%9c%a8servlet%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f%e4%b8%ad%e4%bf%9d%e5%ad%98%e4%b8%8a%e4%bc%a0%e6%96%87%e4%bb%b6%e7%9a%84%e6%8e%a8%e8%8d%90%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/scutvk.cn\/?p=564","title":{"rendered":"\u5728servlet\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4fdd\u5b58\u4e0a\u4f20\u6587\u4ef6\u7684\u63a8\u8350\u65b9\u6cd5"},"content":{"rendered":"\n<p>\u5c06\u5176\u5b58\u50a8\u5728\u9664 IDE \u7684\u9879\u76ee\u6587\u4ef6\u5939\uff08\u5373\u670d\u52a1\u5668\u7684\u90e8\u7f72\u6587\u4ef6\u5939\uff09<strong>\u4e4b\u5916<\/strong>\u7684\u53ef\u8bbf\u95ee\u4f4d\u7f6e\u7684\u4efb\u4f55\u4f4d\u7f6e\uff0c\u539f\u56e0\u5728<a href=\"https:\/\/stackoverflow.com\/questions\/8885201\/uploaded-image-only-available-after-refreshing-the-page\" target=\"_blank\" rel=\"noopener\">\u201c\u4ec5\u5728\u5237\u65b0\u9875\u9762\u540e\u53ef\u7528\u7684\u4e0a\u4f20\u56fe\u50cf<\/a>\u201d\u7684\u56de\u7b54\u4e2d\u63d0\u5230\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\">\n<ol>\n<li>IDE \u9879\u76ee\u6587\u4ef6\u5939\u4e2d\u7684\u66f4\u6539\u4e0d\u4f1a\u7acb\u5373\u53cd\u6620\u5728\u670d\u52a1\u5668\u7684\u5de5\u4f5c\u6587\u4ef6\u5939\u4e2d\u3002IDE \u4e2d\u6709\u4e00\u79cd\u540e\u53f0\u4f5c\u4e1a\uff0c\u8d1f\u8d23\u786e\u4fdd\u670d\u52a1\u5668\u7684\u5de5\u4f5c\u6587\u4ef6\u5939\u4e0e\u4e0a\u6b21\u66f4\u65b0\u540c\u6b65\uff08\u8fd9\u5728 IDE \u672f\u8bed\u4e2d\u79f0\u4e3a\u201c\u53d1\u5e03\u201d\uff09\u3002\u8fd9\u662f\u60a8\u770b\u5230\u7684\u95ee\u9898\u7684\u4e3b\u8981\u539f\u56e0\u3002<\/li>\n\n\n\n<li>\u5728\u5b9e\u9645\u4ee3\u7801\u4e2d\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5c06\u4e0a\u4f20\u7684\u6587\u4ef6\u5b58\u50a8\u5728 Web \u5e94\u7528\u7684\u90e8\u7f72\u6587\u4ef6\u5939\u4e2d\u6839\u672c\u4e0d\u8d77\u4f5c\u7528\u3002\u67d0\u4e9b\u670d\u52a1\u5668\uff08\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u6216\u6309\u914d\u7f6e\uff09\u4e0d\u4f1a\u5c06\u90e8\u7f72\u7684 WAR \u6587\u4ef6\u6269\u5c55\u5230\u672c\u5730\u78c1\u76d8\u6587\u4ef6\u7cfb\u7edf\u4e2d\uff0c\u800c\u662f\u5b8c\u5168\u5728\u5185\u5b58\u4e2d\u3002\u5982\u679c\u4e0d\u57fa\u672c\u4e0a\u7f16\u8f91\u5df2\u90e8\u7f72\u7684 WAR \u6587\u4ef6\u5e76\u91cd\u65b0\u90e8\u7f72\u5b83\uff0c\u5219\u65e0\u6cd5\u5728\u5185\u5b58\u4e2d\u521b\u5efa\u65b0\u6587\u4ef6\u3002<\/li>\n\n\n\n<li>\u5373\u4f7f\u670d\u52a1\u5668\u5c06\u90e8\u7f72\u7684 WAR \u6587\u4ef6\u6269\u5c55\u5230\u672c\u5730\u78c1\u76d8\u6587\u4ef6\u7cfb\u7edf\u4e2d\uff0c\u6240\u6709\u65b0\u521b\u5efa\u7684\u6587\u4ef6\u4e5f\u4f1a\u5728\u91cd\u65b0\u90e8\u7f72\u751a\u81f3\u7b80\u5355\u91cd\u65b0\u542f\u52a8\u65f6\u4e22\u5931\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u65b0\u6587\u4ef6\u4e0d\u662f\u539f\u59cb WAR \u6587\u4ef6\u7684\u4e00\u90e8\u5206\u3002<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n<p>\u5bf9\u4e8e\u6211\u6216\u5176\u4ed6\u4efb\u4f55\u4eba\u6765\u8bf4\uff0c\u53ea\u8981\u60a8<a href=\"https:\/\/stackoverflow.com\/questions\/12160639\/what-does-servletcontext-getrealpath-mean-and-when-should-i-use-it\" target=\"_blank\" rel=\"noopener\"><strong>\u4e0d\u4f7f\u7528<\/strong><code>getRealPath\uff08\uff09<\/code>\u65b9\u6cd5<\/a>\uff0c\u5b83\u5728\u672c\u5730\u78c1\u76d8\u6587\u4ef6\u7cfb\u7edf\u4e0a\u7684\u786e\u5207\u4f4d\u7f6e\u4fdd\u5b58\u5c31\u771f\u7684\u65e0\u5173\u7d27\u8981\u3002<em>\u5728\u4efb\u4f55\u60c5\u51b5\u4e0b\uff0c<\/em>\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\u90fd\u662f\u4ee4\u4eba\u9707\u60ca\u7684\u3002<\/p>\n\n\n\n<p>\u53cd\u8fc7\u6765\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9a\u4e49\u5b58\u50a8\u4f4d\u7f6e\u7684\u8def\u5f84\u3002\u4f60\u5fc5\u987b<em>\u81ea\u5df1<\/em>\u505a\u8fd9\u4e00\u5207\u3002\u4e5f\u8bb8\u8fd9\u5c31\u662f\u5f15\u8d77\u60a8\u6df7\u6dc6\u7684\u5730\u65b9\uff0c\u56e0\u4e3a\u60a8\u4ee5\u67d0\u79cd\u65b9\u5f0f\u671f\u671b\u670d\u52a1\u5668\u81ea\u52a8\u5b8c\u6210\u6240\u6709\u8fd9\u4e9b\u64cd\u4f5c\u3002\u8bf7\u6ce8\u610f\uff0c<strong>\u8fd9\u4e0d\u4f1a<\/strong>\u6307\u5b9a\u6700\u7ec8\u4e0a\u4f20\u76ee\u7684\u5730\uff0c\u4f46\u6848\u4f8b\u6587\u4ef6\u5927\u5c0f\u7684\u4e34\u65f6\u5b58\u50a8\u4f4d\u7f6e\u8d85\u8fc7\u4e86\u5185\u5b58\u5b58\u50a8\u9608\u503c\u3002<code>@MultipartConfig(location)<\/code><\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4efb\u4e00\u65b9\u5f0f\u5b9a\u4e49\u5230\u6700\u7ec8\u5b58\u50a8\u4f4d\u7f6e\u7684\u8def\u5f84\uff1a<\/p>\n\n\n\n<p>1\u3001\u786c\u6838\u7248<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">  File uploads = new File(\"\/path\/to\/uploads\");<\/code><\/pre>\n\n\n\n<p>2\u3001\u73af\u5883\u53d8\u91cf\u901a\u8fc7:<code>SET UPLOAD_LOCATION=\/path\/to\/uploads<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">  File uploads = new File(System.getenv(\"UPLOAD_LOCATION\"));<\/code><\/pre>\n\n\n\n<p>3\u3001\u5728\u670d\u52a1\u5668\u542f\u52a8\u8fc7\u7a0b\u4e2d\uff0c\u901a\u8fc7\u865a\u62df\u673a\u53c2\u6570\u3002<code>-Dupload.location=\"\/path\/to\/uploads\"<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">  File uploads = new File(System.getProperty(\"upload.location\"));<\/code><\/pre>\n\n\n\n<p>4\u3001<code>*.properties<\/code>\u00a0\u6587\u4ef6\u6761\u76ee\u4e3a:<code>upload.location=\/path\/to\/uploads<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">  File uploads = new File(properties.getProperty(\"upload.location\"));<\/code><\/pre>\n\n\n\n<p>5\u3001<code>web.xml&lt;context-param><\/code>\u00a0\u4f7f\u7528\u540d\u79f0\u3001\u503c:<code>upload.location\/path\/to\/uploads<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">  File uploads = new File(getServletContext().getInitParameter(\"upload.location\"));<\/code><\/pre>\n\n\n\n<p>6\u3001\u5982\u679c\u6709\u7684\u8bdd\uff0c\u4f7f\u7528\u670d\u52a1\u5668\u63d0\u4f9b\u7684\u4f4d\u7f6e\uff0c\u4f8b\u5982\u5728\u00a0<a href=\"https:\/\/stackoverflow.com\/questions\/9468045\/reading-writing-a-text-file-in-a-servlet-where-should-this-file-be-stored-in-jb\/\" target=\"_blank\" rel=\"noopener\">JBoss AS\/WildFly<\/a>:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">  File uploads = new File(System.getProperty(\"jboss.server.data.dir\"), \"uploads\");<\/code><\/pre>\n\n\n\n<p>\u65e0\u8bba\u54ea\u79cd\u65b9\u5f0f\uff0c\u60a8\u90fd\u53ef\u4ee5\u8f7b\u677e\u5730\u5f15\u7528\u548c\u4fdd\u5b58\u6587\u4ef6\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">File file = new File(uploads, \"somefilename.ext\");\n\ntry (InputStream input = part.getInputStream()) {\n    Files.copy(input, file.toPath());\n}\n<\/code><\/pre>\n\n\n\n<p>\u6216\u8005\uff0c\u5f53\u60a8\u60f3\u8981\u81ea\u52a8\u751f\u6210\u552f\u4e00\u7684\u6587\u4ef6\u540d\u4ee5\u9632\u6b62\u7528\u6237\u4f7f\u7528\u5de7\u5408\u7684\u76f8\u540c\u540d\u79f0\u8986\u76d6\u73b0\u6709\u6587\u4ef6\u65f6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">File file = File.createTempFile(\"somefilename-\", \".ext\", uploads);\n\ntry (InputStream input = part.getInputStream()) {\n    Files.copy(input, file.toPath(), StandardCopyOption.REPLACE_EXISTING);\n}\n<\/code><\/pre>\n\n\n\n<p>\u5982\u4f55\u5728 JSP\/Servlet \u4e2d\u83b7\u53d6\u5728\u00a0<a href=\"https:\/\/stackoverflow.com\/questions\/2422468\/how-to-upload-files-to-server-using-jsp-servlet\" target=\"_blank\" rel=\"noopener\">How to upload files to server using JSP\/Servlet?<\/a>\u3002\u4ee5\u53ca\u5982\u4f55\u5728 JSF \u4e2d\u83b7\u53d6\u56de\u5e94\u5728 <a href=\"https:\/\/stackoverflow.com\/questions\/27677397\/how-to-upload-file-using-jsf-2-2-hinputfile-where-is-the-saved-file\/\" target=\"_blank\" rel=\"noopener\">How to upload file using JSF 2.2 &lt;h:inputFile>? Where is the saved File?<\/a><\/p>\n\n\n\n<p>\u6ce8\u610f\uff1a<strong>\u4e0d\u8981<\/strong>\u4f7f\u7528&nbsp;<a href=\"http:\/\/docs.oracle.com\/javaee\/7\/api\/javax\/servlet\/http\/Part.html#write(java.lang.String)\" target=\"_blank\" rel=\"noopener\"><code>Part#write\uff08\uff09\uff0c<\/code><\/a>\u56e0\u4e3a\u5b83\u4f1a\u89e3\u91ca\u76f8\u5bf9\u4e8e \u4e2d\u5b9a\u4e49\u7684\u4e34\u65f6\u5b58\u50a8\u4f4d\u7f6e\u7684\u8def\u5f84\u3002\u6b64\u5916\uff0c\u8bf7\u786e\u4fdd\u5728\u8bfb\u53d6\/\u5199\u5165\u8fc7\u7a0b\u4e2d\u9519\u8bef\u5730\u4f7f\u7528 \/ \u800c\u4e0d\u662f \/ \u5c06\u5b57\u8282\u8f6c\u6362\u4e3a\u5b57\u7b26\uff0c\u4ece\u800c\u7edd\u5bf9\u786e\u4fdd\u60a8\u4e0d\u4f1a\u635f\u574f\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u4f8b\u5982 PDF \u6587\u4ef6\u6216\u56fe\u50cf\u6587\u4ef6\u3002<code>@MultipartConfig(location)<\/code><code>Reader<\/code><code>Writer<\/code><code>InputStream<\/code><code>OutputStream<\/code><\/p>\n\n\n\n<h3>\u53e6\u8bf7\u53c2\u9605\uff1a<\/h3>\n\n\n\n<ul>\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/14211843\/how-to-save-uploaded-file\/14214223#14214223\" target=\"_blank\" rel=\"noopener\">How to save uploaded file in JSF<\/a>\u00a0(\u4ee5JSF\u4e3a\u76ee\u6807\uff0c\u4f46\u539f\u7406\u57fa\u672c\u76f8\u540c)<\/li>\n\n\n\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/1812244\/simplest-way-to-serve-static-data-from-outside-the-application-server-in-a-java\" target=\"_blank\" rel=\"noopener\">Simplest way to serve static data from outside the application server in a Java web application<\/a>\u00a0<\/li>\n\n\n\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/31255366\/how-to-save-generated-file-in-servlet-based-web-application\" target=\"_blank\" rel=\"noopener\">How to save generated file temporarily in servlet based web application<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5c06\u5176\u5b58\u50a8\u5728\u9664 IDE \u7684\u9879\u76ee\u6587\u4ef6\u5939\uff08\u5373\u670d\u52a1\u5668\u7684\u90e8\u7f72&hellip;<\/p>\n","protected":false},"author":1,"featured_media":561,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[24,25,2],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/scutvk.cn\/wp-content\/uploads\/2023\/01\/Apache_Tomcat_Logo.png","_links":{"self":[{"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/posts\/564"}],"collection":[{"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/scutvk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=564"}],"version-history":[{"count":1,"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/posts\/564\/revisions"}],"predecessor-version":[{"id":565,"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/posts\/564\/revisions\/565"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/media\/561"}],"wp:attachment":[{"href":"https:\/\/scutvk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/scutvk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/scutvk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}