problem in forwarding one Application to other Application using context based RequestDispatcher.

[Ritesh raushan]

i want to forward a result from one Application to other Application in same server using context based RequestDispatcher but
when i give request to server error occurs and error display on console of tomcat6.exe(server starter).


error is -

java.lang.NullPointerException
at RequestDispatchDemo.doGet(RequestDispatchDemo.java:14)//RequestDispatchDemo.java is my class name
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ss(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:48
9)
at java.lang.Thread.run(Unknown Source)

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;

public class RequestDispatchDemo extends HttpServlet
{
	public void doGet(HttpServletRequest req,HttpServletResponse res)
	{
	try{
      String name=req.getParameter("name");
	  String address=req.getParameter("address");
	 ServletContext ctx1= getServletContext();
      ServletContext ctx2= ctx1.getContext("book");
	 RequestDispatcher rd= ctx2.getRequestDispatcher("/srv1");
	 rd.forward(req,res);
		}
	  catch(Exception e)
		{
		  e.printStackTrace();
		}


	}
};

[Ravinderjit Singh]

ServletContext ctx2= ctx1.getContext("book");

On line 13 you are getting null, you are not giving the correct uri path, it must being with /.

Try

ServletContext ctx2= ctx1.getContext("/book");

[Ritesh raushan]

Ravinderjit Singh wrote:

ServletContext ctx2= ctx1.getContext("book");

On line 13 you are getting null, you are not giving the correct uri path, it must being with /.

Try

ServletContext ctx2= ctx1.getContext("/book");

no,it's not working i think slash used only in url.

[Ravinderjit Singh]

/ is must check the javadoc for getContext function.
getContext