@RequestMapping(value = "/del", method = RequestMethod.POST)
 @ResponseBody
 public Response del(@RequestBody List<String> userItemIds) {
   try {
     itemFollowService.remove(userItemIds);
     return new Response(true, "Xóa thành công danh sách được lựa chọn");
   } catch (Exception ex) {
     return new Response(false, ex.getMessage());
   }
 }
 @RequestMapping(value = "/savenote", method = RequestMethod.GET)
 @ResponseBody
 public Response saveNote(
     @RequestParam(value = "id", defaultValue = "") String id,
     @RequestParam(value = "note", defaultValue = "") String note) {
   try {
     return new Response(true, "OK", itemFollowService.note(id, note));
   } catch (Exception ex) {
     return new Response(false, ex.getMessage());
   }
 }