problem implementing iReports with servlets

[prasuna yegurla]

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.HashMap;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.jasperreports.engine.JasperRunManager;
public class HtnoServlet extends HttpServlet 
{
   
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException,IOException,Exception {     
	 Connection conn=null;
         ServletOutputStream servletOutputStream =response.getOutputStream();
         InputStream reportStream =getServletConfig().getServletContext().getResourceAsStream("classic7.jasper"); 
                                             
    	 try
    	 {
		Class.forName("com.mysql.jdbc.Driver");
     		conn = DriverManager.getConnection("jdbc:mysql://localhost/users?user=root&password=");
		 JasperRunManager.runReportToPdfStream(reportStream,servletOutputStream,new HashMap(),conn);
      		 conn.close();
             response.setContentType("application/pdf");
            servletOutputStream.flush();
            servletOutputStream.close();
		}
	 catch (Exception e)
          {
            // display stack trace in the browser
            StringWriter stringWriter = new StringWriter();
            PrintWriter printWriter = new PrintWriter(stringWriter);
            e.printStackTrace(printWriter);
            response.setContentType("text/plain");
            response.getOutputStream().print(stringWriter.toString());
          }
}
   
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (Exception e) {
            e.printStackTrace();
        }
    } 
    
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
     public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
 }

[prasuna yegurla]

and when i am tring to run this it is giving following exception and i kept the .jasper file in the current folder ...i tried putting ./ before file name also plase help....

java.lang.NullPointerException
	at java.io.ObjectInputStream$PeekInputStream.read(ObjectInputStream.java:2283)
	at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2296)
	at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2767)
	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:798)
	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:298)
	at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:191)
	at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:361)
	at net.sf.jasperreports.engine.JasperRunManager.runReportToPdfStream(JasperRunManager.java:163)
	at HtnoServlet.processRequest(HtnoServlet.java:49)
	at HtnoServlet.doPost(HtnoServlet.java:94)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
	at java.lang.Thread.run(Thread.java:675)

[Ulf Dittmer]

Please refrain from using big font sizes for complete posts; they're meant to highlight short excerpts. Also, in the future please UseCodeTags. It's unnecessarily hard to read the code without them, making it less likely that people will bother to do so.

... in the current folder...

Web apps have no concept of a working directory. The way you're loading the file it needs to be present in the classpath of the web app; is that the case?