how to get response from one servlet to another?

Question

I have one Servlet A in which I put my result (eg URL ) in JSONObject (org.codehaus.jettison.json.JSONObject) .I am trying to get url from Servlet A to Servlet B with passing some parameters (like ID ).How to do this?

Is it possible?

Thanks.

Answer 1

You can use request dispatcher and in request object you can set the attribute using request.setAttribute() in Servlet A and in Servlet B you can access it using request.getAttribute()

RequestDispatcher dispatcher = request.getRequestDispatcher(URL_PATTERN_OF_ANOTHERSERVLET);
dispatcher.forward(request,response);

Answer 2

Try using sessions.

Servlet A:

HttpSession session = request.getSession();
session.setAttribute("id", yourValue);

Servlet B:

String str = (String)session.getAttribute("id");

Answer 3

You can get the url by the following code:

request.getAttribute("javax.servlet.forward.request_uri")

And then you can navigate to another servlet using

response.sendRedirect("/ServletB")

EDIT

In Servlet B:

request.setAttribute("attributeName",StringParameter);
RequestDispatcher rd = request.getRequestDispatcher("/ServletA");
rd.forward(request,response);

In Servlet A:

String r = (String)request.getAttribute("attributeName");