protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            response.setContentType("text/html;charset=UTF-8");
            request.setCharacterEncoding("UTF-8");
            ICommand command = RequestHelper.getInstance().getCommand(request);
            String page = command.execute(request, response);
            RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(page);
            dispatcher.forward(request, response);
        } catch (ServletException | IOException ex) {
            
        }
    }