数据成功增加到了数据库，但是跳转的一瞬间没有东西可以显示

最后也没有显示，代码和老师是一样的

@WebServlet("/addusers") public class UsersAddServlet extends HttpServlet { private UsersDao usersDao=new UsersDao(); @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { this.doPost(req, resp); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { //获取要添加的用户数据 String username=req.getParameter("username"); String userpass=req.getParameter("userpass"); String nickname=req.getParameter("nickname"); String age=req.getParameter("age"); String gender=req.getParameter("gender"); String email=req.getParameter("email"); String phone=req.getParameter("phone"); // Users user=new Users(username,userpass,nickname,Integer.parseInt(age),gender,email,phone,new Date(),new Date(),new Date(),0); //将用户对象添加到数据库中 usersDao.addUser(user); resp.sendRedirect("/mybatispro_war_exploded/detail.jsp?id="+user.getId()); } }