Java EE (Java Enterprise Edition) General Discussion

Hi..

After clicking the logout,the page is forwarding to login page.
The problem is,if am clicking the back button am going back to previous page.
Since i have destroy the session also.
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();

try {
ServletContext context=getServletContext();

HttpSession session=request.getSession(false);
session.removeAttribute("user");
session.invalidate();
try
{
String user = (String)session.getAttribute("user");
}
catch(NullPointerException e) // it will definately be null pointer so this part will get executed
{

response.setHeader("Cache-Control","no-cache");
response.setHeader("Pragma","no-cache");
response.setDateHeader ("Expires", 0);
RequestDispatcher reqdis=request.getRequestDispatcher("/Login2.jsp");
reqdis.forward(request,response);
session.setMaxInactiveInterval(1);

}



}
finally {

out.close();
}
}

How to proceed after logout i must not go back back to previous page by clicking back button.

regards,
satheesh