springmvc数据校验。（后台校验 hibernate validate）.

    @RequestMapping("registe")
    public String registe1(@Valid people peo,BindingResult br,Model model) {
        
        if(br.hasErrors()) {
            Map<String, Object> map=new HashMap<>();
            List<FieldError> fieldErrors = br.getFieldErrors();
            for(FieldError f:fieldErrors) {
                System.out.println(f.getField());
                map.put(f.getField(), f.getDefaultMessage());
            }
            model.addAttribute("map", map);
            return "forward:../registe.jsp";
        }else {
        return "list";
        }
    }