34 lines
1.2 KiB
Java
34 lines
1.2 KiB
Java
|
Forward to a servlet by name
|
||
|
|
|
||
|
|
package com.ack.web.servlet;
|
||
|
|
|
||
|
|
import java.io.IOException;
|
||
|
|
import javax.servlet.RequestDispatcher;
|
||
|
|
import javax.servlet.ServletException;
|
||
|
|
import javax.servlet.http.HttpServlet;
|
||
|
|
import javax.servlet.http.HttpServletRequest;
|
||
|
|
import javax.servlet.http.HttpServletResponse;
|
||
|
|
|
||
|
|
public class ForwardToAServletByName extends HttpServlet {
|
||
|
|
public void doGet( HttpServletRequest req, HttpServletResponse res )
|
||
|
|
throws ServletException, IOException {
|
||
|
|
// do not commit anything to the response stream before a forward
|
||
|
|
|
||
|
|
// set in a request attribute to communicate hello to the
|
||
|
|
// servlet we forward to
|
||
|
|
req.setAttribute( "hello", "world" );
|
||
|
|
|
||
|
|
// create a request dispatcher by name to forward to
|
||
|
|
// this is more limiting that getRequestDispatcher because
|
||
|
|
// you cannot specified a query string or extra path information
|
||
|
|
//
|
||
|
|
// however, you can dispatch to named web components within the
|
||
|
|
// web.xml that do not have publicised URIs
|
||
|
|
RequestDispatcher rd =
|
||
|
|
getServletContext().getNamedDispatcher( "receiveforward" );
|
||
|
|
|
||
|
|
// and then forward
|
||
|
|
rd.forward( req, res );
|
||
|
|
}
|
||
|
|
}
|