Session expire and back button in jsp and servlet .

Hii Sir, I have to make a login and logout page with sessions .Now i have to invalidate

the session after a certain interval of time and after clicking logout button.Means that

after session expiry time and logout action no one can access previous pages by clicking

back button of browser without again logging.

Plz sir give me the full working code of this .It is the starting need of my project.

Thank you Sir.

View Answers

August 28, 2012 at 3:53 PM

Use session.invalidate() method to close the session.Here is an example.

1)login.jsp:

<html>

<head>

<title>User Login</title>
</head>
<br>
<body Bgcolor ="#0099cc"><hr><hr>

<form method="POST" action="action.jsp">
<p><b>UserName:</b> <input type="text" name="UserName" size="10"></p>
<p><b>Password:</b>   <input type="Password" name="Password" size="10"></p>
<p><input type="submit" value="Submit" name="submit"><input type=
"reset" value="Reset" name="reset"></p><hr><hr>
</form>

</body>

</html>

2)action.jsp:

<%@page import="java.util.*" %>
<script>
function go() {
window.location.replace("logout.jsp",'window','toolbar=1,location=1,directories=1,status=1,menubar=1,scrollbars=1,resizable=1');
self.close()
}
</script>
<%String str = request.getParameter("UserName");
session.setAttribute("UserName", request.getParameter("UserName"));%>
Welcome to <%= session.getAttribute( "UserName" ) %>
<% if (session.getAttribute("UserName").equals("")){%>
<a href="login.jsp"><b>Login </b></a>
<%}
else{%>
<a href="javascript:go()"><b>Logout</b></a>
<%}
%>

3)logout.jsp:

<%session.invalidate();%>
You have logged out. Please
<a href="a.jsp"><b>Login</b></a>

August 28, 2012 at 4:10 PM

Thank you very much for your quick response. But Sir According to my need the session should be expired automatically after certain time.

April 8, 2013 at 9:59 AM

brother u have to change session time out in web.xml file..according to ur needs

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