Mensagem Servlet?

servlets/Gatec

<?xml version="1.0"?>

&lt;!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
    "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd"&gt;

&lt;web-app&gt;
	&lt;display-name&gt;JasperReports&lt;/display-name&gt;

	&lt;servlet&gt;
		&lt;servlet-name&gt;Gatec&lt;/servlet-name&gt;
		&lt;servlet-class&gt;servlets.Gatec&lt;/servlet-class&gt;
	&lt;/servlet&gt;

	&lt;servlet-mapping&gt;
		&lt;servlet-name&gt;Gatec&lt;/servlet-name&gt;
		&lt;url-pattern&gt;/gatec&lt;/url-pattern&gt;
	&lt;/servlet-mapping&gt;

	&lt;welcome-file-list&gt;
		&lt;welcome-file&gt;index.html&lt;/welcome-file&gt;
	&lt;/welcome-file-list&gt;
	&lt;login-config&gt;
		&lt;auth-method&gt;BASIC&lt;/auth-method&gt;
	&lt;/login-config&gt;
&lt;/web-app&gt;

java.lang.NoClassDefFoundError

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.export.*;
import net.sf.jasperreports.engine.util.*;
import net.sf.jasperreports.view.*;

import java.sql.*;
import org.apache.commons.logging.*;
import java.io.*;
import java.util.*;


public class Gatec extends TagSupport
{
private String sourceFileName = "C:\\Arquivos de programas\\Apache Software Foundation\\Tomcat5.0\\webapps\\web_consultas\\reports\\gatec.jasper";
private String destinationFileName = "C:\\Arquivos de programas\\Apache Software Foundation\\Tomcat5.0\\webapps\\web_consultas\\reports\\gatec.pdf";


public void setSourceFileName(String sourceFileName)
{
this.sourceFileName = sourceFileName;

}
public void setDestinationFileName(String destinationFileName)
{
this.destinationFileName = destinationFileName;
}


public int doStartTag()
{
return SKIP_BODY;
}

public int doEndTag()
{
try
{

//Passaggio parametri da passare al jasper.
Map parameters = new HashMap();
parameters.put("param1", new Integer(1));


//Preparazione del file da stampare (in questa fase si esegue la query e si inseriscono
//i valori estratti dalla query)
JasperPrint jasperPrint=JasperFillManager.fillReport(sourceFileName, parameters, getConnection());


//Creazione del file PDF
JasperExportManager.exportReportToPdfFile(jasperPrint, destinationFileName);


//Streaming a video del PDF
pageContext.getOut().print(JasperExportManager.exportReportToPdf(jasperPrint));

}


catch(Exception e)
{}


return EVAL_PAGE;
}


/**Metodo per creare la connessione al DB*/
private static Connection getConnection() throws ClassNotFoundException, SQLException {
//Change these settings according to your local configuration

String driver = "oracle.jdbc.driver.OracleDriver";
String connectString = "jdbc:Oracle:thin:@server:1521:oracle";
String user = "user";
String password = "passwd";

Class.forName(driver);
Connection conn = DriverManager.getConnection(connectString, user, password);
return conn;
}

}