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");
}
}
}
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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>
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The output of the program is given below:
Download
this example:
