Response.sendRedirect() problem

Question

Hi all,
I in facing a problem during using response.sendRedirect() or there is some mistake, please help me...
I have written two jsp files:
i.e. first.jsp and second.jsp
FIRST.JSP is as follwing:
<%@ page import="java.io.*" %>
<%
     response.sendRedirect("http://192.168.0.4:9999/mylogo/second.jsp");
%>
and SECOND.JSP is as follows:
<%@ page import="java.io.*" %>
<%
     String coding=request.getParameter("name").trim();
%>
     My name is <h1><%= coding %></h1>
but when i write the follwing in address bar:
http://localhost:9999/mylogo/first.jsp?name=jake
an error occurs:
NullPointerException messae is received. I am using Apache Tomcat/4.1.29.
Please help me, and tell if ther is any thing missing in this code....
Thankx in advance...

Answer 1

When you use redirection, you are sending a header back to the browser which tells it to go somewhere else. This results in an entirely new request. Because of this, any request info from the first page will not be in the second. The advantage of redirects is you can tell the browser to go to any other server.
If you want to maintain the same request info, you can use forward. Forward only passes control in the server to another page. The browser will have no idea that this is happening, and it cannot go to another server.