New to Java

Hi all,

i am creating a web application in eclipse SDK...when a user logins , he is assigned a session as

HttpSession session = req.getSession(true);
session.setAttribute("username", user);
and then user is redirected to openings.jsp page

my openings.jsp page contains.
if (session.getAttribute("username") == null){
response.sendRedirect("logout.jsp");
}

and my logout code is:

session.removeAttribute("username");
session.invalidate();
response.sendRedirect("Login.html");

my problem is this whenever i write http://localhost:8081/jobs/openings.jsp
it is redirected to that openings page with a previous username...

i want that whenever i write http://localhost:8081/jobs/openings.jsp i should be redirected to login page..
how this can be done...??

Thanks in advance..