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To Determine whether the Session is New or Old
Posted on: July 16, 2007 at 12:00 AM

In this program we are going to make one servlet on session in which we will check whether the session is new or old.

To Determine whether the Session is New or Old

In this program we are going to make one servlet on session in which we will check whether the session is new or old.

To make this program firstly we need to make one class named CheckingTheSession. Inside the doGet() method, which takes two objects one of request and second of response. Inside this method call the method getWriter() of the response object. Use getSession() of the request object, which returns the HttpSession object. Now by using the HttpSession we can find out whether the session is new or old.

The code of the program is given below:


import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;



public class CheckingTheSession extends HttpServlet{

  protected void doGet(HttpServletRequest request, HttpServletResponse 

  response)throws ServletException, IOException {

  response.setContentType("text/html");

  PrintWriter pw = response.getWriter();

  pw.println("Checking whether the session is new or old<br>");

  HttpSession session = request.getSession();

  if(session.isNew()){

  pw.println("You have created a new session");

  }

  else{

  pw.println("Session already exists");

  }

  }

}

web.xml file for this program:


<?xml version="1.0" encoding="ISO-8859-1"?>

<!--<!DOCTYPE web-app

 PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

 "http://java.sun.com/dtd/web-app_2_3.dtd"> -->



<web-app>

 <servlet>

  <servlet-name>Hello</servlet-name>

  <servlet-class>CheckingTheSession</servlet-class>

 </servlet>

 <servlet-mapping>

 <servlet-name>Hello</servlet-name>

 <url-pattern>/CheckingTheSession</url-pattern>

 </servlet-mapping>

</web-app>

The output of the program is given below:

Download this example:

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