springboot 添加验证器

1、添加依赖

        
        
            org.springframework.boot
            spring-boot-starter-validation
        

2、验证器类

public class UserStorevalidator {

    private Long userId;

    @NotNull(message = "用户名不能为空")
    @Size(min = 2, max = 20, message = "账号长度必须是2-20个字符")
    private String userName;

    @Size(min = 6, max = 20, message = "密码长度必须是6-20个字符")
    private String userPassword;

    @NotNull(message = "用户类型不能为空")
    private Character type;

    private Timestamp registerTime;

}

3、在控制器中使用

    @PostMapping("")
    public ReturnResult store(@RequestBody @Validated UserStorevalidator userStorevalidator) {
        UserStorevalidator store = userService.store(userStorevalidator);

        System.out.println(userStorevalidator);

        return ReturnResult.success( "添加用户成功");
    }

4、自定义验证失败的异常

@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

    
    @ExceptionHandler(value = MethodArgumentNotValidException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public String handleBindGetException(MethodArgumentNotValidException ex) {
        // 获取所有异常
//        List errors = ex.getBindingResult()
//                .getFieldErrors()
//                .stream()
//                .map(x -> x.getDefaultMessage())
//                .collect(Collectors.toList());
        return "验证失败啦";
    }