Jasper/tomcat error

[cdlaforc]

Hello,

I'm trying to setup my first jasper report in tomcat and receiving and error. Tomcat can run the example programs that are bundled with it so I know it's working. Here is the error I receive when trying to run a static report.

 

Code:

type Exception report

message

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

exception

java.lang.NullPointerException
	java.io.ObjectInputStream$PeekInputStream.read(ObjectInputStream.java:2264)
	java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2277)
	java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2748)
	java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:780)
	java.io.ObjectInputStream.<init>(ObjectInputStream.java:280)
	net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:191)
	net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:580)
	net.sf.jasperreports.engine.JasperRunManager.runReportToPdfStream(JasperRunManager.java:368)
	FirstReport.doGet(FirstReport.java:27)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	filters.ExampleFilter.doFilter(ExampleFilter.java:102)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.23 logs.

 

Here is the code for my java page:

Code:

[code] import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.io.StringWriter; 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.JREmptyDataSource; import net.sf.jasperreports.engine.JRException; import net.sf.jasperreports.engine.JasperRunManager; public class FirstReport extends HttpServlet { protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ServletOutputStream servletOutputStream = response.getOutputStream(); InputStream reportStream = getServletConfig().getServletContext().getResourceAsStream("../reports/FirstReport.jasper"«»); try { JasperRunManager.runReportToPdfStream(reportStream, servletOutputStream, new HashMap(), new JREmptyDataSource()); response.setContentType("application/pdf"«»); servletOutputStream.flush(); servletOutputStream.close(); } catch (JRException 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()); } }

 

Please let me know if you can offer any help.

Thanks,

 

Chris.

[lucianc]

Your reportStream is probably null. Change your code to properly resolve the .jasper resource.

 

Regards,

Lucian

[pvemuri]

hi:

 

I have the same setup ie Struts with Tomcat and i get the same error.

Has this issue been resolved? If not, i will gladly post my Struts action.

 

phanindra