I want to parser XML (sended by Apache SOAP and tomcat),tomcat Receive by " C:\Program Files\Apache Tomcat 4.0\webapps\examples\WEB-INF\classes\HTTPReceive",but i don't how write completely? please give directions!thanks !

import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.IOException;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.ContentHandler;
import org.xml.sax.helpers.XMLReaderFactory;
import java.io.FileInputStream;
import java.util.Properties;
import org.xml.sax.Attributes;
import org.xml.sax.ErrorHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXParseException;
public class HTTPReceive extends HttpServlet
{
    public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws IOException, ServletException
    {
        System.out.println("Received GET request");
        response.setStatus(HttpServletResponse.SC_BAD_REQU EST);
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws IOException, ServletException
    {
        System.out.println("____________________________") ;
        System.out.println("Received request.");
        System.out.println("-----------------------");

        // Traverse the HTTP headers and show them on the screen
        for(Enumeration enum = request.getHeaderNames();
          enum.hasMoreElements(); ){
            String header = (String)enum.nextElement();
            String value = request.getHeader(header);

            System.out.println(" " + header + " = " + value);
        }

        System.out.println("-----------------------");

        if(request.getContentLength() > 0)
        {
    try
    {
            java.io.BufferedReader reader = request.getReader();
            XMLReader parser=XMLReaderFactory.createXMLReader(
           "org.apache.xerces.parsers.SAXParser");
            //·ÖÎöÎļþ
            parser.parse(new org.xml.sax.InputSource (reader));
           }
           catch(IOException ioe)
          {
         System.out.println(ioe.getMessage());
           }
           catch(SAXException saxe)
           {
               System.out.println(saxe.getMessage());
            }
              }
System.out.println("____________________________") ;

        response.setContentType("text/xml"); // Need this to prevent Apache SOAP from gacking
    }