后台数据校验

1.在方法参数中对实体进行声明@Valid和BindingResult result
2.通过解析BindingResult 并封装到map中，然后返回输出
3.实体的数据校验

 @NotBlank(message = "用户昵称不能为空")
    @Length(max = 12, message = "用户昵称不能超过12位")
    @ApiModelProperty(value="用户昵称", name="nickname", example="杰森", required = false)
    private String nickname;

    @Length(max = 12, message = "用户真实姓名不能超过12位")
    @ApiModelProperty(value="真实姓名", name="realname", example="杰森", required = false)
    private String realname;

    @Pattern(regexp = "^(((13[0-9]{1})|(15[0-9]{1})|(18[0-9]{1}))+\\d{8})$", message = "手机号格式不正确")
    @ApiModelProperty(value="手机号", name="mobile", example="13999999999", required = false)
    private String mobile;

    @Email
    @ApiModelProperty(value="邮箱地址", name="email", example="[email protected]", required = false)
    private String email;

    @Min(value = 0, message = "性别选择不正确")
    @Max(value = 2, message = "性别选择不正确")
    @ApiModelProperty(value="性别", name="sex", example="0:女 1:男 2:保密", required = false)
    private Integer sex;
    @ApiModelProperty(value="生日", name="birthday", example="1900-01-01", required = false)
    private Date birthday;

  public IMOOCJSONResult update(
            @ApiParam(name = "userId", value = "用户id", required = true)
            @RequestParam String userId,
            @RequestBody @Valid CenterUserBO centerUserBO,
            BindingResult result,
            HttpServletRequest request, HttpServletResponse response) {

        System.out.println(centerUserBO);

        // 判断BindingResult是否保存错误的验证信息，如果有，则直接return
        if (result.hasErrors()) {
            Map<String, String> errorMap = getErrors(result);
            return IMOOCJSONResult.errorMap(errorMap);
        }
        }

 private Map<String, String> getErrors(BindingResult result) {
        Map<String, String> map = new HashMap<>();
        List<FieldError> errorList = result.getFieldErrors();
        for (FieldError error : errorList) {
            // 发生验证错误所对应的某一个属性
            String errorField = error.getField();
            // 验证错误的信息
            String errorMsg = error.getDefaultMessage();

            map.put(errorField, errorMsg);
        }
        return map;
    }