Redirect the HTML page to another one using servlet

Question

I used this method and the commented once but it did not work , the print method work properly but the redirection didn't.

        else if (action.contentEquals("Login")) 
    {

        RequestDispatcher view = request.getRequestDispatcher("mainPage.html");
        try {
            System.out.print("Login now");
            view.forward(request, response);
        } catch (ServletException e1) {
            System.out.print("Error Loging in");
        } 


        /*try {
            System.out.print("Login now");
             response.sendRedirect("mainPage.html");
             return;

        } catch (IOException e) {
            System.out.print("Error");      }
        */
    }

Answer 1

You can get some ideas here:

Redirecting a calling JSP to itself using RequestDispatcher object

RequestDispatcher view = request.getRequestDispatcher("mainPage.html");
    try {
        System.out.print("Login now");
        view.forward(request, response);
        response.sendRedirect("mainPage.html");
    } catch (ServletException e1) {
        System.out.print("Error Loging in");
    }