Upload servelet issues

hi, i got a project that involves uploading file using a servlet. searching on google I found the "commons file upload " of apache. done it, added jar files.

commons-file-upload-1.2.1-bin and
commons-lang-2.4-bin.

when i first ran the application, it was successful until loading the loading of the file. when i tried to upload it, this error pops up

java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileItemFactory
java.lang.Class.getDeclaredConstructors0(Native Method)
java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
java.lang.Class.getConstructor0(Class.java:2699)
erThread.java:112)
.
.
.
java.lang.Thread.run(Thread.java:619)

so i figured that maybe i did not add the jar files to the server. i opened the server and added some jar files
(C:\Program Files\jboss-4.0.5.GA\server\default\lib) I put it there because i seen many jar files there(i think i will be scolded in this....).

i ran the application again. but this time it yielded a differend error.

java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream
org.apache.commons.fileupload.disk.DiskFileItemFactory.createItem(DiskFileItemFactory.java:196)
org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:358)
org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:126)
ph.com.mobility.projects.model.EprocUploadServlet.doPost(EprocUploadServlet.java:41)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

what does this one means? do i need to download additional jar files?

done from netbeans 6.5 and Jboss as the server.

here is the code of the file upload servlet.

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.lang.Object;
import java.util.*;
import java.lang.String;
import org.apache.commons.fileupload.*;
import org.apache.commons.fileupload.disk.*;
import org.apache.commons.fileupload.servlet.*;
public class FileUploadApacheAPI extends HttpServlet
{
public void doPost(HttpServletRequest request, HttpServletResponse response)throws
ServletException, IOException
{
response.setContentType("text/html");
PrintWriter pw=response.getWriter();
String fileName=null;
long sizeInBytes=0;
try
{ 
// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
if(isMultipart)
{
// Create a factory for disk-based file items
FileItemFactory factory = new DiskFileItemFactory();
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// Parse the request
List /* FileItem */ items = upload.parseRequest(request);
// Process the uploaded items
Iterator iter = items.iterator();
while (iter.hasNext())
{
/* fetch an item from the iterator above */
FileItem item = (FileItem) iter.next();
if (!item.isFormField())
{
/* retrives name of the file uploaded from the client machine */ 
fileName = item.getName(); 
/* retrives size in byte of the file uploaded from the client machine */ 
sizeInBytes = item.getSize(); 
/* Create a new file on server machine */
File uploadedFile = new File("C:\\WINDOWS\\system32\\CPFR\\veer.txt"); 
/* following statement writes to uploadedFile in single stroke */ 
item.write(uploadedFile); 
/* job done ! */
}
}
pw.println("<h1>success ......"+fileName+"... "+sizeInBytes+" uploaded...... </h1><br>");
}
else
pw.println("<h1>NOT a multipart content....... </h1><br>");
}
catch(Exception e)
{
pw.println("<h1>other file problem</h1><br>");
}
}
}

The Commons FileUpload library needs the Commons IO library in order to work. Luckily, the Apache package names are pretty consistently named, so as you get more experienced you'll be able to see what's missing just by looking at the error message.

thank you very much. yeah it resolved the problem but a new problem arises lol. Ill post a new thread