RequestDispathcher

[vinay bedidha]

i want to transfer control from a servlet to JspPage("Home.jsp")
iam getting a problem when using
RequestDispatcher rd=getServletContext().getRequestDispathcher("/Home.jsp");
iam getting NullPointerException problem.if i use response.sendRedirect("/Home.jsp"); it's working fine.
what's the problem with RequestDispatcher?

[David O'Meara]

(This appears to be a continuation of the thread here)
What configuration are you using, is there a web server in front? sendRedirect() forces the browser to make a re-request for the specified page and hence comes from "the outside world". getRequestDispatcher().XXX() loads and returns the respource from the server within the application context.
Dave.

[vinay bedidha]

hi David,
Thanks for your answer.
iam using Borland Application server and jsdk2.0.when iam using RequestDispatcher, during compilation time it's giving error message as follows..
unable to Resolve symbol RequestDispathcher rd=getServletContext().getRequestDispatcher("/Home.jsp");
plz help me..
thanks

[Kyle Brown]

Where is "Home.jsp" located with respect to the root of your war file? That might make a difference.
Kyle
------------------
Kyle Brown,
Author of Enterprise Java (tm) Programming with IBM Websphere
See my homepage at http://members.aol.com/kgb1001001 for other WebSphere information.

[Mike Curwen]

There might be a clue in the API

The original problem was that getRequestDispatcher() and request.getRequestDispatcher() seemed to offer different behaviour.

From the API: The difference between this method
[ ie: HttpRequest.getRequestDispatcher(java.lang.String) ]
and ServletContext.getRequestDispatcher(java.lang.String) is that this method can take a relative path.

[Mouse Slider]

getServletContext().getRequestDispatcher("Home.jsp").include(request, response);
getServletContext().getRequestDispatcher("Home.jsp").forward(request, response);
cheers.