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POHow to upload files to server using JSP/Servlet?
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  1. POHow to upload files to server using JSP/Servlet?
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    copied!<p>How can I upload files to server using JSP/Servlet? I tried this:</p> <pre class="lang-html prettyprint-override"><code>&lt;form action="upload" method="post"&gt; &lt;input type="text" name="description" /&gt; &lt;input type="file" name="file" /&gt; &lt;input type="submit" /&gt; &lt;/form&gt; </code></pre> <p>However, I only get the file name, not the file content. When I add <code>enctype="multipart/form-data"</code> to the <code>&lt;form&gt;</code>, then <code>request.getParameter()</code> returns <code>null</code>. </p> <p>During research I stumbled upon <a href="http://commons.apache.org/fileupload" rel="noreferrer">Apache Common FileUpload</a>. I tried this:</p> <pre><code>FileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); List items = upload.parseRequest(request); // This line is where it died. </code></pre> <p>Unfortunately, the servlet threw an exception without a clear message and cause. Here is the stacktrace:</p> <pre><code>SEVERE: Servlet.service() for servlet UploadServlet threw exception javax.servlet.ServletException: Servlet execution threw an exception at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:313) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:637) </code></pre>
 

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