@RequestMapping(value="/del/{id}")

    public String delUser(@PathVariable int id){

        return "redirect:/user";

    }

    @RequestMapping(value="/del/{id}", method=RequestMethod.GET, produces="text/html;charset=UTF-8")

    public String delUser(@PathVariable int id, RedirectAttributes redirectAttributes){

        redirectAttributes.addFlashAttribute("delinfo", id+"删除成功");

        return "redirect:/user";

    }