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always print old session

Samanthi perera

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posted 14 years ago

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this is my jsp class

this is my servlet class

package com.example;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class login extends HttpServlet {
	private static final long serialVersionUID = 1L;

public login() {
        // TODO Auto-generated constructor stub
    }

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

PrintWriter out = response.getWriter();
		//out.println("test session attributes<br>");
		HttpSession session = request.getSession();
		
		if(session.isNew()){
			
			out.println("New Session");
			
		}else{
			
			out.println("Old Session");
			
		}
		
	}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
	}

}

when i run this jsp and submit it always prints old session ?
why?

Charles 'King

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posted 14 years ago

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Samanthi perera wrote:
when i run this jsp and submit it always prints old session ?
why?

isNew() misleads many developers. isNew() will only return true if the server creates a session, but the client has not yet joined.

For example, turn off your cookies in your browser. Then run your application; it'll print "New Session" - Don't employ isNew to reliably check user authentication. Rely on user objects bound to sessions.

Samanthi perera

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posted 14 years ago

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it works if i disable session on the jsp too.
anyway if new user comes the server gives a session ID for him with response.
then the next time user has the that ID .
when user fills the jsp file and submit .
why it dosn't happen here?

Samanthi perera

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Posts: 510

posted 14 years ago

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I need to identify when first time loging user is a new one
and from second time onwords user is a old one
and i need to print new user or old user
can anyone change this example
?

Charles 'King

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Posts: 56

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posted 14 years ago

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Samanthi perera wrote:I need to identify when first time loging user is a new one
and from second time onwords user is a old one
and i need to print new user or old user
can anyone change this example
?

Is this a homework assignment? We're here to help, not do your hw. Try this:

In your servlet:

Samanthi perera

Ranch Hand

Posts: 510

posted 14 years ago