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Actually i have downloaded a JAR file.
I have also placed the jar file in jspbook/WEB-INF/lib/ folder .
I am trying file upload through a HTML file which has following code. actually i am accessing servlet FileUploadCommons though this HTML file and using an API for file upload present in that JAR file.

<title>Example HTML Form</title>
<p>Select a file to upload or <a href="/jspbook/files/">browse
currently uploaded files.</a></p>
<form action=""
method="post" enctype="multipart/form-data">
File: <input type="file" name="file"><br>
<input value="Upload File" type="submit">

The source code for servlet FileUploadCommons is as follows ::::

package com.jspbook;

import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.commons.fileupload.*;
import java.util.*;

public class FileUploadCommons extends HttpServlet {
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {

PrintWriter out = response.getWriter();

out.print("File upload success. <a href=\"/jspbook/files/");
out.print("\">Click here to browse through all uploaded ");

ServletContext sc = getServletContext();
String path = sc.getRealPath("/files");
org.apache.commons.fileupload.FileUpload fu = new
try {
List l = fu.parseRequest(request);
Iterator i = l.iterator();
while (i.hasNext()) {
FileItem fi = (FileItem);
// trim out full path info if it is included
String filename = fi.getName();
int slash = filename.lastIndexOf("\\");
if (slash != -1) {
filename = filename.substring(slash + 1);
// write the file to the 'files' directory
catch (Exception e) {
throw new ServletException(e);

public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
doPost(request, response);

Also i am using Tomcat 5 as the web server.

But when i try to upload the file by running the HTML file i am getting the following ERROR MESSAGE :

HTTP Status 500 -


type Exception report


description The server encountered an internal error () that prevented it from fulfilling this request.


javax.servlet.ServletException: Servlet execution threw an exception

root cause

java.lang.NoSuchMethodError: org.apache.commons.fileupload.FileUpload.setSizeMax(I)V
com.jspbook.FileUploadCommons.doPost(Unknown Source)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.


Apache Tomcat/5.0.28

Please tell me what to do?
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