@RequestMapping(value = "PosterLoginServlet", produces = "application/json;charset=UTF-8")
 @ResponseBody
 public String PosterLogin(HttpServletRequest req) {
   String infor = req.getParameter("sendInfor");
   String postername = "";
   String password = "";
   System.out.println(infor);
   JSONObject json;
   try {
     json = new JSONObject(infor);
     postername = json.getString("postername");
     password = json.getString("password");
   } catch (JSONException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
   }
   Map<String, Object> posterinfo = new HashMap<String, Object>();
   posterinfo = us.PosterLogin(postername, password);
   if (posterinfo != null && !posterinfo.toString().equals("[]")) {
     JSONObject jsonres = new JSONObject(posterinfo);
     System.out.println(jsonres.toString());
     return encodeUTF_8.encodeStr(jsonres.toString());
   } else {
     return "Failed to Login!";
   }
 }
 @ResponseBody
 @RequestMapping("AdminPosterServlet")
 public ModelAndView getAllUsers(HttpServletRequest req) {
   ArrayList<Poster> posters = us.DisplayAllUsers();
   ModelMap modelmap = new ModelMap();
   modelmap.put("posters", posters);
   HttpSession session = req.getSession();
   session.setAttribute("poster", posters.get(0));
   // getData(req);
   return new ModelAndView("poster", modelmap);
   // return new ModelAndView("user");
 }
  @RequestMapping("poster-delete")
  @ResponseBody
  public String deletePoster(HttpServletRequest req) {
    String id = req.getParameter("posterID");
    System.out.println(id);
    int result = us.deletePoster(id);
    String deleteInfor = "";
    if (result == 1) {
      deleteInfor = "delete sucessful";
    }

    return deleteInfor;
  }
  @RequestMapping("add-poster")
  @ResponseBody
  public String addPoster(HttpServletRequest req) throws JSONException {
    String postername = req.getParameter("name");
    String posterpassword = req.getParameter("password");
    String posterphone = req.getParameter("phone");
    String posterlevel = req.getParameter("level");
    String posterPlace = req.getParameter("place");
    System.out.println(postername + posterpassword + posterphone + posterlevel);
    int result = us.addPoster(postername, posterpassword, posterphone, posterlevel, posterPlace);
    System.out.println(result);
    JSONObject json = new JSONObject();
    // String addInfor ="";
    if (result == 1) {

      json.put("addInfor", "OK");
    } else if (result == 0) {
      json.put("addInfor", "此手机号已被使用");
      ;
    }
    return json.toString();
  }