Error when loading servlet using JDOM

Question

hi,
I'm new in the servlet developpement and I would like to have your helps.
I use JDOM to access to XML files. I use Eclipse WTP, and Tomcat like servlet container.
When I try to load the simple servlet file, I get an exception which shows me that there is java.lang.NoClassDefFoundError: org/jdom/JDOMException.
I think there are problems in the configuration, but I don't know why. Any help would be welcome.
This is my code
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.xpath.XPath;
import org.jdom.*;
* Servlet implementation class for Servlet: test1
public class test1 extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
     String xparams_input_file="xparamsdata.xml";; //Fichier d'entr�e XML
     Document xparams_document;
     Element xparams_Element;
     /* (non-Java-doc)
     * @see javax.servlet.http.HttpServlet#HttpServlet()
     public test1() {
          super();
     /* (non-Java-doc)
     * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          // TODO Auto-generated method stub
          doPost(request,response);
     /* (non-Java-doc)
     * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          // TODO Auto-generated method stub
          System.out.println("TestOK");
     /* (non-Javadoc)
     * @see javax.servlet.GenericServlet#init()
     public void Lire_XParams_XML(){
          SAXBuilder saxBuilder = new SAXBuilder();
          try{               
               xparams_document = saxBuilder.build(xparams_input_file);
               xparams_Element = xparams_document.getRootElement();               
          catch (JDOMException e)
          { // indicates a well-formedness or other error
               //e.printStackTrace();
               System.out.println(xparams_input_file + " is not a well formed XML document.");
               System.out.println(e.getMessage());               
          catch (IOException e)
          { // indicates an IO problem
               System.out.println(xparams_input_file + " could not be parsed");
               System.out.println(e.getMessage());
     public void init() throws ServletException {
          // TODO Auto-generated method stub
          super.init();
          System.out.println("TestOK init");
And the errors
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Error instantiating servlet class test1
     org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
     org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
     org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
     org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
     org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
     org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
     org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
     org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
     java.lang.Thread.run(Unknown Source)
root cause
java.lang.NoClassDefFoundError: org/jdom/JDOMException
     java.lang.Class.getDeclaredConstructors0(Native Method)
     java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
     java.lang.Class.getConstructor0(Unknown Source)
     java.lang.Class.newInstance0(Unknown Source)
     java.lang.Class.newInstance(Unknown Source)
     org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
     org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
     org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
     org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
     org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
     org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
     org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
     org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
     java.lang.Thread.run(Unknown Source)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.
Apache Tomcat/5.5.17

Answer 1

Have u set the classpath for jdom.jar. If u have jdom.jar file in ur machine , set the classpath to that. otherwise download one from the net .
http://www.jdom.org/dist/binary/
put it in ur build path.