how to send the request to another sevlet

[sudhakar papireddy]

hi
i have two sevlets. The request always comes to first servlet with one parameter. I would like to send the request to another servlet depends on the parameter value.

can some one help on this. how we can send the request from one sevlet to another?

Thanks
Sudhakar

[Ulf Dittmer]

You could either do a client-side response.sendRedirect or a server-side RequestDispatcher.forward (or include). The latter will preserve request information and attributes (which are lost when doing the former).

[Qussay Najjar]

Let's say that you have a JSP page that sends a String conatins the name of the servlet to go to.
Your first serlvet receives this request, and it can have this code to decide the next servlet to go:

    
//This String has the name of the wanted servlet to reach.
String whereToGo = request.getParamet("exampleField");
ServletContext context = getServletContext();
RequestDispatcher dispatcher = context.getRequestDispatcher(whereToGo);
 try {
dispatcher.forward(request,response);
return;
     } catch (ServletException e) {}
       catch (IOException e) {}

Hope it helped...

[Ulf Dittmer]

catch (ServletException e) {}
catch (IOException e) {}

It really goes without saying, but silently ignoring exceptions is of course something you should almost never do, and definitely not here.
[ January 19, 2008: Message edited by: Ulf Dittmer ]

[Qussay Najjar]

You're completely right Sir, for sure i didn't catch the exception for nothing, but i was just showing an example.. really thanks for the note..

[Rahul Shilpakar]

i think we can also use Query String!