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copied!<p>First, you'd normally use <a href="http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JSPIntro7.html" rel="nofollow noreferrer">EL (Expression Language)</a> to display it:</p> <pre><code><p>${message}</p> </code></pre> <p>Second, the request attribute may be null in the view if you're actually doing a <strong>redirect</strong> to the view using <code>response.sendRedirect("/login.jsp")</code>. Even though the code displays you're doing a <em>forward</em>, but you told that you were redirecting to the login page. A redirect basically instructs the client to create a new request and hereby the original request including all of its attributes will be garbaged.</p> <p><strong>See also:</strong></p> <ul> <li><a href="http://courses.coreservlets.com/Course-Materials/csajsp2.html" rel="nofollow noreferrer">Beginning and intermediate JSP/Servlet tutorials</a></li> <li><a href="https://stackoverflow.com/questions/2349633/servlets-doget-and-dopost/2349741#2349741">More extended answer on the subject (also as asked in your previous question)</a></li> <li><a href="https://stackoverflow.com/questions/1945377/authenticating-the-username-password-by-using-filters-in-java-contacting-with-d/1946121#1946121">Authenticating a logged in user using Filters</a></li> </ul> <hr> <p><strong>Update</strong> as per your update, the <code>/login/index.jsp</code> is in turn apparently doing a redirect. I'd suggest to get rid of it and just have a <code>/login.jsp</code>. You can eventually hide it in <code>/WEB-INF/login.jsp</code> so that you can keep using nice URL's. Rewrite <code>LoginServlet</code> (of which I assume that it's listening on an <code>url-pattern</code> of <code>/login</code>) as follows:</p> <pre><code>protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.getRequestDispatcher("/WEB-INF/login.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String username = request.getParameter("username"); String password = request.getParameter("password"); User user = userDAO.find(username, password); if (user != null) { request.getSession().setAttribute("user", user); response.sendRedirect("home"); } else { request.setAttribute("message", "Unknown user, please try again"); request.getRequestDispatcher("/WEB-INF/login.jsp").forward(request, response); } } </code></pre> <p>Also see the 2nd link which I posted in the <em>See also</em> list here above.</p>

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