Servlet session creation time, session accessed time, and session id

This example illustrates how to find the session creation time, session accessed time, and session id of servlet.
import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

import java.util.Date;



public class SessionServlet extends HttpServlet { 

    public void doGet (HttpServletRequest req, HttpServletResponse res)    throws ServletException, IOException {

        HttpSession session = req.getSession(true);

        res.setContentType("text/html");

        PrintWriter pw = res.getWriter();

        pw.println("<head><title> " + "SessionServlet Output " + "</title></head><body>");

        pw.println("<h1> SessionServlet Output </h1>");

        Integer ival = (Integer) session.getAttribute("sessionservlet.counter");

        if (ival == null) {

            ival = new Integer(1);

        } else {

            ival = new Integer(ival.intValue() + 1);

        }

        session.setAttribute("sessionservlet.counter", ival);

        pw.println(" You have hit this page <b>" + ival + "</b> times.<p>");

        pw.println("Click <a href=" + res.encodeURL(HttpUtils.getRequestURL(req).toString()) + ">here</a>");

        pw.println(" to ensure that session tracking is working even " + "if cookies aren't supported.<br>");

        pw.println("Note that by default URL rewriting is notenabled" + " due to its large overhead.");

        pw.println("<h3>Request and Session Data</h3>");

        pw.println("Session ID in Request: " + req.getRequestedSessionId());

        pw.println("<br>Session ID in Request is from a Cookie: " + req.isRequestedSessionIdFromCookie());

        pw.println("<br>Session ID in Request is from the URL: " + req.isRequestedSessionIdFromURL());

        pw.println("<br>Valid Session ID: " + req.isRequestedSessionIdValid());

        pw.println("<h3>Session Data</h3>");

        pw.println("New Session: " + session.isNew());

        pw.println("<br> Session ID: " + session.getId());

        pw.println("<br> Creation Time: " + new Date(session.getCreationTime()));

        pw.println("<br>Last Accessed Time: " + new Date(session.getLastAccessedTime()));

        pw.println("</body>");

        pw.close();

    }



    public String getServletInfo() {

        return "A simple session servlet";

    }

}