URDINESH: SERVELET

Tuesday, May 20, 2014

JAVA CODE FOR SESSION MANAGEMENT USING SERVLET-HIDDEN FORM FIELD

Front page using html

<html>

<head>

<title> EXAMPLE FOR SESSION:HIDDEN FORM FIELDS </title>

</head>

<h1>WELCOME TO EBAY!!!!</h1><BR>

<H2>YOU ARE IN COMPUTER PAGE</H2>

<center> <b>SELECT THE ITEM U LIKE TO PURCHASE

<input type="radio" name="s1" value="V1">PEN DRIVE

<input type="radio" name="s1" value="V2">PRINTER

<input type="radio" name="s1" value="V3">WEB CAMERA

</center>

</form>

</body>

</html>

Hidden1.java

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

import java.util.*;

public class Hidden1 extends HttpServlet

{

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

{

res.setContentType("text/html");

PrintWriter pw=res.getWriter();

String item1=req.getParameter("s1");

pw.println("<html><body>");

pw.println("<form method=get action=\"http://localhost:8080/servlet/Hidden2\">");

pw.println("<h1>WELCOME TO EBAY!!!!</h1><BR>");

pw.println("<H2>YOU ARE IN MOBILE PAGE</H2>");

pw.println("<center> <b>SELECT THE ITEM U LIKE TO PURCHASE

<br><br>");

pw.println("<input type="radio" name="s2" value="V1">NOKIA ");

pw.println("<input type="radio" name="s2" value="V2">SAMSUNG ");

pw.println("<input type="radio" name="s2" value="V3">LG");

pw.println("<br><br>");

pw.println("<input name=s2 type=hidden value= "+item1+ "><br>");

pw.println("<input name=submit type=submit value=click><br>");

pw.println("<input name=reset type=reset value=reset ><br>");

pw.println("</center></form>");

pw.println("</body></html>");

pw.close();

}

Hidden2.java

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

import java.util.*;

public class Hidden2 extends HttpServlet

{

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

{

res.setContentType("text/html");

PrintWriter pw=res.getWriter();

String n1=req.getParameter("item1");

String n2=req.getParameter("item2");

pw.println("<html><body bgcolor="cyan");

pw.println("<h1> Welcome!!!!! "</h1><br><br>");

pw.println("<h2> Dear customer, You have selected" +n1 +"and" +n2+"</h2>");

pw.println("</body></html>");

pw.close();

}

JAVA CODE FOR SESSION MANAGEMENT USING SERVLET-SESSION IDS

PROGRAM:

import java.io.*;

import java.util.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class SessionSnoop extends HttpServlet

{

public void doGet(HttpServletRequest req, HttpServletResponse res)

throws ServletException, IOException

{

res.setContentType("text/html");

PrintWriter out = res.getWriter();

HttpSession session = req.getSession(true);

Integer count = (Integer)session.getValue("snoop.count");

if (count == null)

count = new Integer(1);

else

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

session.putValue("snoop.count", count);

out.println("<HTML><HEAD><TITLE>SessionSnoop</TITLE></HEAD>");

out.println("<BODY><H1>Session Snoop</H1>");

out.println("You've visited this page " + count +

((count.intValue() == 1) ? " time." : " times."));

out.println("<P>");

out.println("<H3>Here is your saved session data:</H3>");

String[] names = session.getValueNames();

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

out.println(names[i] + ": " + session.getValue(names[i]) + "<BR>");

}

out.println("<H3>Here are some vital stats on your session:</H3>");

out.println("Session id: " + session.getId() + "<BR>");

out.println("New session: " + session.isNew() + "<BR>");

out.println("Creation time: " + session.getCreationTime());

out.println("<I>(" + new Date(session.getCreationTime()) + ")</I><BR>");

out.println("Last access time: " + session.getLastAccessedTime());

out.println("<I>(" + new Date(session.getLastAccessedTime()) +

")</I><BR>");

out.println("Requested session ID from cookie: " +

req.isRequestedSessionIdFromCookie() + "<BR>");

out.println("Requested session ID from URL: " +

req.isRequestedSessionIdFromUrl() + "<BR>");

out.println("Requested session ID valid: " +

req.isRequestedSessionIdValid() + "<BR>");

out.println("<H3>Here are all the current session IDs");

out.println("and the times they've hit this page:</H3>");

HttpSessionContext context = session.getSessionContext();

Enumeration ids = context.getIds();

while (ids.hasMoreElements()) {

String id = (String)ids.nextElement();

out.println(id + ": ");

HttpSession foreignSession = context.getSession(id);

Integer foreignCount =

(Integer)foreignSession.getValue("snoop.count");

if (foreignCount == null)

out.println(0);

else

out.println(foreignCount.toString());

out.println("<BR>");

}

out.println("</BODY></HTML>");

}

Tuesday, May 20, 2014

JAVA CODE FOR SESSION MANAGEMENT USING SERVLET-HIDDEN FORM FIELD

JAVA CODE FOR SESSION MANAGEMENT USING SERVLET-SESSION IDS

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