Session ID

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June 10, 2008 at 6:43 PM

Hi friend,

package javacode;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import javax.net.*;

public class GetSession extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
HttpSession session = req.getSession(true);
res.setContentType("text/html");
PrintWriter out = res.getWriter();
String title = "Searching the Web";
String heading;
Integer count = new Integer(0);;
if (session.isNew()) {
heading = "Welcome, To GetID";
}
else {
heading = "Welcome Back";
Integer oldcount = (Integer)session.getValue("count");
if (oldcount != null) {
count = new Integer(oldcount.intValue() + 1);
}
}
session.putValue("count", count);
out.println(ServletValue.headWithTitle(title) +
"<body BGCOLOR=\"pink\">\n" +
"<h1 ALIGN=\"CENTER\">" + heading + "</h1>\n" +
"<center><H2>Information on Your Session:</H2></center>\n" +
"<TABLE BORDER=1 ALIGN=CENTER>\n" +
"<tr BGCOLOR=\"green\">\n" +
" <TH>Info Type<TH>Value\n" +
"<tr>\n" +
" <td><b>ID</b>\n" +
" <td>" + session.getId() + "\n" +
"<tr>\n" +
" <td><b>Creation Time</b>\n" +
" <td>" + new Date(session.getCreationTime()) + "\n" +
"<tr>\n" +
" <td><b>Time of Last Access</b>\n" +
" <td>" + new Date(session.getLastAccessedTime()) + "\n" +
"<tr>\n" +
" <td><b>Number of Previous Accesses</b>\n" +
" <td>" + count + "\n" +
"</table>\n" +
"</body></html>");

}
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

----------------------------------------------------

June 10, 2008 at 6:47 PM

package javacode;

import javax.servlet.*;
import javax.servlet.http.*;

public class ServletValue {
public static final String DOCTYPE =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">";

public static String headWithTitle(String title) {
return(DOCTYPE + "\n" +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n");
}

public static int getIntParameter(HttpServletRequest request,
String paramName,
int defaultValue) {
String paramString = request.getParameter(paramName);
int paramValue;
try {
paramValue = Integer.parseInt(paramString);
} catch(NumberFormatException nfe) { // Handles null and bad format
paramValue = defaultValue;
}
return(paramValue);
}

public static String getCookieValue(Cookie[] cookies,
String cookieName,
String defaultValue) {
for(int i=0; i<cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookieName.equals(cookie.getName()))
return(cookie.getValue());
}
return(defaultValue);
}

}

-----------------------------------------------

<servlet>
<servlet-name>getsession</servlet-name>
<servlet-class>javacode.GetSession</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>getsession</servlet-name>
<url-pattern>/jsp/GetSession</url-pattern>
</servlet-mapping>

---------------------------------------------
Read for more information.

http://www.roseindia.net/servlets/

Thanks