/** @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */
 protected void doPost(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   HttpSession session = request.getSession();
   DBConnection con = (DBConnection) session.getAttribute("connection");
   if (con == null) {
     con = new DBConnection();
     session.setAttribute("connection", con);
   }
   User currUser = (User) session.getAttribute("user");
   int adminId = currUser.getId();
   String content = request.getParameter("announceContent");
   if (Admin.registerAnnounce(adminId, content, con)) {
     RequestDispatcher dispatch = request.getRequestDispatcher("Admin.jsp");
     dispatch.forward(request, response);
   } else {
     RequestDispatcher dispatch = request.getRequestDispatcher("Error.html");
     dispatch.forward(request, response);
   }
 }