Problem with jasper reports

hi,
I m having problem using jasperreports with servlets and tomcat so i m giving my code and error generated.
Please also tell me where to put .jasper and .jrxml files in tomcat dir and whether their path in servlet shud be relative or absolute?
Please dont tell me that resultset can be directly passed to .jrxml coz i know it actually this is just sample code actually my resultset
will change according to values enterd by user input thats why i m executing it in servlet and then sending to .jasper file.

PROGRAM: MADE IN ECLIPSE WITH JASPER ASSISTANT:-

import java.io.*;
import java.sql.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.jasperreports.engine.*;
/**
 * Servlet implementation class for Servlet: JustTest
 *
 */
 public class JustTest extends javax.servlet.http.HttpServlet 
implements javax.servlet.Servlet {
    /* (non-Java-doc)
 * @see javax.servlet.http.HttpServlet#HttpServlet()
 */
public JustTest() {
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
ServletOutputStream servletOutputStream=response.getOutputStream();
InputStream 
reportStream=getServletConfig().getServletContext().getResourceAsStream("/Test/test_report.jasper");
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection 
con=DriverManager.getConnection("jdbc    :-o	    dbc:test","root","matrix");
Statement stmt=con.createStatement();
String com="select * from timepass";
ResultSet result=stmt.executeQuery(com);
JRResultSetDataSource resultSetDataSource=new 
JRResultSetDataSource(result);

JasperRunManager.runReportToPdfStream(reportStream,servletOutputStream,new HashMap(),resultSetDataSource);
result.close();
stmt.close();
con.close();
response.setContentType("application/pdf");
servletOutputStream.flush();
servletOutputStream.close();
}
catch(Exception e)
{
StringWriter stringWriter=new StringWriter();
PrintWriter printWriter=new PrintWriter(stringWriter);
e.printStackTrace(printWriter);
response.setContentType("text/plain");
response.getOutputStream().print(stringWriter.toString());
}
}         
}

ERROR GENERATED:-

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
JustTest

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.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)

org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
java.lang.Thread.run(Unknown Source)

root cause

java.lang.NoClassDefFoundError:
net/sf/jasperreports/engine/JRDataSource
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.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.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)

org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
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

[ January 02, 2007: Message edited by: Varun Kumar ]

java.lang.NoClassDefFoundError:
net/sf/jasperreports/engine/JRDataSource

Looks like it can't find one of the classes in the JasperReports libraries.
Where did you put the jar files?

i have included every jar file from dist and lib directories of jasperreports in build path in eclipse as external jar files.
But dont know if other jar file should be present in tomcat dir and where?
[ January 03, 2007: Message edited by: Varun Kumar ]

other jar file shud b present

"shud" and "b" are not real words. Please use only real words such as "should" and "be" when posting.

Thanks.

Genreally, jars that are used by a single application are placed within that application's WEB-INF/lib folder.

For jars to be shared across multiple applicartions, Tomcat provides common locations for those, but let's just concentrate on your one app for now.

Are you running the app from within eclipse, or in a standalone instance of Tomcat?

i m running application from within eclipse.
[ January 03, 2007: Message edited by: Varun Kumar ]

i have put all jars in the WEB-INF/LIB dir of the application and now i m getting this error:
java.lang.NullPointerException
at java.io.ObjectInputStream$PeekInputStream.read(Unknown Source)
at java.io.ObjectInputStream$PeekInputStream.readFully(Unknown Source)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(Unknown Source)
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:191)
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:580)
at net.sf.jasperreports.engine.JasperRunManager.runReportToPdfStream(JasperRunManager.java:368)
at JustTest.doPost(JustTest.java:43)
at JustTest.doGet(JustTest.java:25)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Unknown Source)
-------------------------------------------------------------------------------------------------------------------------------

Kindly tell me where to put .jrxml and .jasper file in tomcat directory.

[ January 03, 2007: Message edited by: Varun Kumar ]
[ January 03, 2007: Message edited by: Varun Kumar ]

Originally posted by Bear Bibeault:
... jars that are used by a single application are placed within that application's WEB-INF/lib folder.