Multipart Http Request

Question

How can i initialized Multipart request..? I am uploading file using multipart/form-data content type but i can't get multipart request in my controller.So how can i get multipart request in my controller .. Thanks in Advance. I am getting error like this..

Jun 13, 2012 2:01:05 PM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [appServlet] in context with path [/Login] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: Multipart request not initialized] with root cause java.lang.IllegalStateException: Multipart request not initialized at org.springframework.web.multipart.support.AbstractMultipartHttpServletRequest.initializeMultipart(AbstractMultipartHttpServletRequest.java:107) at org.springframework.web.multipart.support.AbstractMultipartHttpServletRequest.getMultipartFiles(AbstractMultipartHttpServletRequest.java:97) at org.springframework.web.multipart.support.AbstractMultipartHttpServletRequest.getFile(AbstractMultipartHttpServletRequest.java:60) at com.mpm.common.controller.FileUploadController.create(FileUploadController.java:62) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176) at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436) at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:669) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:585) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:279) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722)

And my JSP code is :

 <body> <h1>Please upload a file</h1> <form method="post" action="upload.action" enctype="multipart/form-data"> <input type="text" name="name"/></br> <input type="file" name="file"/></br> <input type="submit"/> </form> </body>

and my servlet-context.xml code is :

 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- one of the properties available; the maximum file size in bytes --> </bean> <bean id="fileUploadController" class="com.mpm.common.controller.FileUploadController" ></bean>

@hcg I was thinking the same, but then it fails on the create so looks like the configuration is wrong, and it doesn't seem wrong. — maksimov
– maksimov, Commented Jun 13, 2012 at 8:50

sp00m · Accepted Answer · 2012-06-13 08:47:29Z

You seem to use Spring. In that case, I usually manage multipart requests like this:

@RequestMapping("/url") public String method(HttpServletRequest request) { MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request; // do stuff with multipartRequest return "/jsp"; }

You simply need to cast your HttpServletRequest request.

Alpesh Prajapati · Accepted Answer · 2012-06-13 08:48:15Z

 public void upload(HttpServletRequest request) { File up = new File("C:\\temp"); // path where u need to upload // Create object of MultipartRequest to upload file MultipartRequest m; try { m = new MultipartRequest(request, up.toString()); Enumeration files = m.getFileNames(); // Get the files to be uploaded from enumeration while (files.hasMoreElements()) { String upload = (String) files.nextElement(); filename = m.getFilesystemName(upload); // out.println("<br/><br/><br/><br/>"); } } catch (IOException e) { System.out.println("Error in Uploading files..."); } xsdName = filename.substring(0, filename.lastIndexOf('.')); }

it was my code to do the same in servlet. Hope it helps.

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