session.getAttribute returns null

Question

I'am using jsp and servlet to realize the authentication before any access to the application The is the code of my doPost method:

 protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {


        String username = request.getParameter("username");
        String password = request.getParameter("password");
        Account account;

        try {

            //Checking if the user already exists
            account = accountBesinessLocal.findByLogin(String.valueOf(username));
            if (account != null) {
                logger.log(Level.WARNING, "[User exists:{0}]", username);
                if (accountBesinessLocal.authentificateUser(String.valueOf(username), String.valueOf(password))) {
                    HttpSession session = request.getSession(true);
                    System.out.println(session);
                    session.setAttribute("username", account.getLogin());       
                    session.setAttribute("password", account.getPassword());  
                    System.out.println("this "+session.getAttribute(username)+" is connected");
                    response.sendRedirect(home.xhtml");
                } else {
                    request.setAttribute("erreur", "Incorrect Authentication");
                    getServletContext().getRequestDispatcher("/loginForm.jsp").forward(request, response);
                }
            } else {
                request.setAttribute("erreur", "Incorrect Authentication");
                logger.log(Level.WARNING, "[User does not exist:{0}]", username);
                getServletContext().getRequestDispatcher("/loginForm.jsp").forward(request, response);
            }
        } finally {
        }
    }

When i try to get the login of the user conneced with session.getAttribute(username); it returns null. How can i solve this?

Answer 1

You must use

session.getAttribute("username") 

and not

session.getAttribute(username)

the value of username is whatever the user has entered in the login input field. It's not "userame".

Side note: your code doesn't compile, s you might be running code that isn't the one ou posted.