using iReport

Hello sir, I am using iReport3.0 and then i am calling the .jrxml file in jsp but i got the
error.My JSP code is as below and after the jsp code i have placed the error code

Thanks in advance:

<%@ page import="java.sql.*" %>
<%@ page import="java.lang.*" %>
<%@ page import="java.lang.Object" %>
<%@ page import="java.io.*" %>
<%@ page import="java.util.*" %>
<%@ page import="java.text.*" %>
<%@ page import="net.sf.jasperreports.engine.*" %>
<%@ page import="net.sf.jasperreports.engine.util.*" %>
<%@ page import="net.sf.jasperreports.engine.export.*" %>
<%@ page import="net.sf.jasperreports.engine.JasperCompileManager" %>
<%@ page import="net.sf.jasperreports.engine.design.JRMultiClassCompiler" %>
<%@ page import="net.sf.jasperreports.engine.JasperManager" %>
<%@ page import="net.sf.jasperreports.engine.xml.JRXmlLoader" %>
<%@ page import="net.sf.jasperreports.engine.JasperPrint" %>
<%@ page import="net.sf.jasperreports.engine.JasperFillManager" %>
<%@ page import="net.sf.jasperreports.engine.JasperExportManager" %>
<%@ page import="net.sf.jasperreports.engine.JREmptyDataSource" %>
<%@ page import="net.sf.jasperreports.engine.JasperReport" %>
<%@ page import="net.sf.jasperreports.engine.design.*" %>
<%@ page import="net.sf.jasperreports.view.JasperViewer" %>
<%@ page import="net.sf.jasperreports.engine.JRException" %>
<% 
String reportSource ="C://Program Files//Apache Software Foundation//Tomcat 6.0//webapps//test//WEB-INF//classes//classic.jrxml";
String reportDest = "C://Program Files//Apache Software Foundation//Tomcat 6.0//webapps//test//GROUP//sample.html";
Map params = new HashMap();
try
{
JasperDesign jasperDesign=JRXmlLoader.load(reportSource);
JasperManager.loadXmlDesign("classic.jrxml");
JasperReport jasperReport =JasperCompileManager.compileReport(jasperDesign);
JasperPrint jasperPrint =JasperFillManager.fillReport(jasperReport, params, new JREmptyDataSource());
JasperExportManager.exportReportToHtmlFile(jasperPrint, reportDest);
JasperViewer.viewReport(jasperPrint);
}
catch (JRException ex)
{
ex.printStackTrace();
}
%>

and the error is as below:
type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /GROUP/sample.jsp at line 28

25: Map params = new HashMap();
26: try
27: {
28: JasperDesign jasperDesign=JRXmlLoader.load(reportSource);
29: JasperManager.loadXmlDesign("classic.jrxml");
30: JasperReport jasperReport =JasperCompileManager.compileReport(jasperDesign);
31: JasperPrint jasperPrint =JasperFillManager.fillReport(jasperReport, params, new JREmptyDataSource());

Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/commons/digester/SetNestedPropertiesRule
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:862)
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791)
    org.apache.jsp.GROUP.sample jsp.jspService(sample_jsp.java:120)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

java.lang.NoClassDefFoundError: org/apache/commons/digester/SetNestedPropertiesRule
    net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:203)
    net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:168)
    net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:152)
    org.apache.jsp.GROUP.sample jsp.jspService(sample_jsp.java:101)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause 

java.lang.ClassNotFoundException: org.apache.commons.digester.SetNestedPropertiesRule
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
    org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
    net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:203)
    net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:168)
    net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:152)
    org.apache.jsp.GROUP.sample jsp.jspService(sample_jsp.java:101)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)