/**
  * Handles the HTTP <code>GET</code> method.
  *
  * @param request servlet request
  * @param response servlet response
  * @throws ServletException if a servlet-specific error occurs
  * @throws IOException if an I/O error occurs
  */
 @Override
 protected void doGet(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   String forward = "";
   String action = request.getParameter("action");
   if (action.equalsIgnoreCase("listar")) {
     forward = "/tanque/index.jsp";
     request.setAttribute("tanque", dao.getAllTanque());
     RequestDispatcher view = request.getRequestDispatcher(forward);
     view.forward(request, response);
   } else if (action.equalsIgnoreCase("create")) {
     forward = "/tanque/crear.jsp";
     RequestDispatcher view = request.getRequestDispatcher(forward);
     view.forward(request, response);
   } else if (action.equalsIgnoreCase("edit")) {
     String userId = request.getParameter("userId");
     tanque objtanque = dao.getUserById(userId);
     request.setAttribute("tanque", objtanque);
     forward = "/tanque/editar.jsp";
     RequestDispatcher view = request.getRequestDispatcher(forward);
     view.forward(request, response);
   } else if (action.equalsIgnoreCase("delete")) {
     Integer userId = Integer.parseInt(request.getParameter("tanqueId"));
     dao.deleteTanque(userId);
     HttpSession session = request.getSession();
     session.setAttribute("exito", "Tus datos se Eliminaron correctamente");
     forward = "/tanque/index.jsp";
     request.setAttribute("tanque", dao.getAllTanque());
     RequestDispatcher view = request.getRequestDispatcher(forward);
     view.forward(request, response);
   }
 }
 /**
  * Handles the HTTP <code>POST</code> method.
  *
  * @param request servlet request
  * @param response servlet response
  * @throws ServletException if a servlet-specific error occurs
  * @throws IOException if an I/O error occurs
  */
 @Override
 protected void doPost(HttpServletRequest request, HttpServletResponse response)
     throws ServletException, IOException {
   String forward = "";
   String action = request.getParameter("action");
   tanque tanque = new tanque();
   if (action.equalsIgnoreCase("create")) {
     tanque.setNombre_tanque(request.getParameter("nombre_tanque"));
     tanque.setColor(request.getParameter("color"));
     tanque.setVolumen(Double.parseDouble(request.getParameter("volumen")));
     dao.addTanque(tanque);
     HttpSession session = request.getSession();
     session.setAttribute("exito", "Tus datos se registraron correctamente");
     forward = "/tanque/index.jsp";
     request.setAttribute("tanque", dao.getAllTanque());
     RequestDispatcher view = request.getRequestDispatcher(forward);
     view.forward(request, response);
   } else if (action.equalsIgnoreCase("update")) {
     tanque.setId_tanque(Integer.parseInt(request.getParameter("id")));
     tanque.setNombre_tanque(request.getParameter("nombre_tanque"));
     tanque.setColor(request.getParameter("color"));
     tanque.setVolumen(Double.parseDouble(request.getParameter("volumen")));
     dao.updateTanque(tanque);
     HttpSession session1 = request.getSession();
     session1.setAttribute("exito", "Tus datos se Editaron correctamente");
     forward = "/tanque/index.jsp";
     request.setAttribute("tanque", dao.getAllTanque());
     RequestDispatcher view1 = request.getRequestDispatcher(forward);
     view1.forward(request, response);
   }
 }