problem in uploading the file in springframework

I am enclosing the code here please suggest modifications if any

this is my form:

<%@ include file="/WEB-INF/jsp/include.jsp" %>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form:form action="updateConfig.html" method="POST" enctype="multipart/form-data">
<div align="center">
<fieldset>
<legend ><font color="#666666">Config List</font></legend>
   <table border="0" width="729" id="table1" cellspacing="0">
   <tr>
<td width="393" colspan="3" ></td>
<td width="332"></td>
</tr>   
<tr>
<td align="left" width="30%" class="list-header">Label</td>
<td align="left" width="70%" class="list-header">Value</td>
</tr>
   <c:forEach items="${configList}" var="l">
   <tr>
   <td width="30%" align="left"><c   :-o	   ut value="${l.label}" /></td>
<td width="70%" align="left"><c:if test="${l.label=='filelocation'}"><input type="file" id="filename" name="filename" size="40" value="<c   :-o	   ut value="${l.value}"/>"/></c:if><c:if test="${l.label!='filelocation'}"><input type="text" id="value" name="value" size="40" value="<c   :-o	   ut value="${l.value}" />"/></c:if></td>
  </tr>
   </c:forEach>
   </table>
   </fieldset>
   </div>
   <div align="center">
<input type="submit" id="submit" value="Save Config" />
</div>
</form:form>
</body>
</html>

this is my UpdateConfigController's code :

package com.igs.tup.config.controller;
 
import java.io.File;
import java.util.Iterator;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import org.springframework.web.servlet.view.RedirectView;
 
import com.igs.tup.config.pojos.Config;
import com.igs.tup.config.services.ConfigServices;
 
public class UpdateConfigController implements Controller{
protected ConfigServices service;
protected List<Config> configList;
public void setConfigService(ConfigServices value){
this.service=value;
}
public ModelAndView handleRequest(HttpServletRequest request,HttpServletResponse response) throws Exception {
System.out.println("update Controllers Handle method called");
String ParameterNames="value";
                String[] s=request.getParameterValues(ParameterNames);
                configList=service.getConfigList();
Config[] configArray=configList.toArray(new Config[0]);
           boolean isMultipart =           ServletFileUpload.isMultipartContent(request);
System.out.println(isMultipart); 
if (!isMultipart) {
 for(int i=0;i<=s.length-1;i++){
 configArray[i].setValue(s[i]);
 }
 } 
 else {
FileItemFactory factory = new DiskFileItemFactory();
 ServletFileUpload upload = new ServletFileUpload(factory);
 List items = null;
   try {
   items = upload.parseRequest(request);
   } 
   catch (FileUploadException e) {
   e.printStackTrace();
   }
   Iterator itr = items.iterator();
   while (itr.hasNext()) {
   FileItem item = (FileItem) itr.next();
   if (item.isFormField()){
                               for(int i=0;i<=s.length-1;i++){
   configArray[i].setValue(s[i]);
 }
                             else{
                              String itemName = item.getName();
                File savedFile = new File(request.getSession().getServletContext().getRealPath("/")+itemName);
                              item.write(savedFile); 
                              }    
                            }

[ December 17, 2008: Message edited by: amity raj ]
[ December 17, 2008: Message edited by: amity raj ]

I am unable to write the file. Please help me find out the mistakes in my code.I have added the bean MultipartResolver to my Spring-Config file.I have also added the jar files commons-fileUpload.jar to my lib folder.

this is my Display Controller

this is my spring-config

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
<a href="http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">" target="_blank" rel="nofollow">http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"></a>

<bean id="module5_urlMapping"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/admin/config/index.html">admin.config.DisplayConfigListController</prop>
<prop key="/admin/config/displayConfigList.html">admin.config.DisplayConfigListController</prop>
<prop key="/admin/config/updateConfig.html">admin.config.UpdateConfigController</prop>
</props>
</property>
</bean>

I am unable to upload the file.Can somebody please help me.Its urgent
[ December 17, 2008: Message edited by: amity raj ]