Practical 24) Develop an application to demonstrate how the client (browser) can remember the last time it visited a page and displays the duration of time since its last visit. (Hint: use Cookie).

Filename-UserVisited.java

package def24;

import javax.servlet.*;

import javax.servlet.http.*;

import java.io.*;

import java.util.*;

public class UserVisited extends HttpServlet

{

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

          {

                   res.setContentType("text/html");

                   PrintWriter out = res.getWriter();

                  

                   Date d = new Date();

                  

                   String myDateStr = String.valueOf(d.getTime());

                  

                   Cookie myc = new Cookie("Pranav",myDateStr);

                   myc.setMaxAge(60*60*24*365);

                   res.addCookie(myc);

                  

                  

                   Cookie cary[] = req.getCookies();

                  

                   if(cary != null)

                   {

                             for(int i=0; i<cary.length; i++)

                             {

                                      if(cary[i].getName().equals("Pranav"))

                                      {

                                                long t1 = Long.parseLong(cary[i].getValue());

                                                long t2 = d.getTime();

                                                long t = t2 - t1;

                                                out.println("You visited last date " + new Date(t1) + "<br>Current Date is " + new Date(t2) + "  " );

                                                out.println("<br>You have visited since " + (t/1000) + " Seconds");

                                      }

                             }

                   }

                  

                            

          }

         

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

          {

                   doPost(req,res);

          }

}