Redirecting To The Root Url In Servlet

Hi I did simple web application with servlet, to serve login and welcome page based on the session available. I had attached the code below, whenever the user types the URL http:/

Solution 1:

You should not check only whether session is null. You should put a value like 'logged_in' into session as attribute. Then, control it for deciding where to route.

Update:

As a quick solution, route doGet inside LoginServlet to doPost and change doPost as below:

publicvoiddoPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        System.out.println("login servlet get method");
        HttpSession session = req.getSession(false);
        if (session != null && session.getAttribute("sessionUserName")!=null) {
            System.out.println("request with session");
            resp.sendRedirect("/");
        } else {

            String name = req.getParameter("username");
            String password = req.getParameter("password");
            if (name.equals("admin") && password.equals("password")) {
                session = req.getSession();
                session.setAttribute("sessionUserName", name);
                resp.sendRedirect("/");

            } else {
               System.out.println("request no session");
                req.getRequestDispatcher("/WEB-INF/login.html").forward(req, resp);
            }

        }

    }