@ControllerAdvice

public class WebExceptionHandler {


　　 //处理Get请求中 使用@Valid 验证路径中请求实体校验失败后抛出的异常，详情继续往下看代码

    @ExceptionHandler(BindException.class)

    @ResponseBody

    public ResponseVO BindExceptionHandler(BindException e) {

        String message = e.getBindingResult().getAllErrors().stream().map(DefaultMessageSourceResolvable::getDefaultMessage).collect(Collectors.joining());

        return new ResponseVO(message);

    }

    //处理请求参数格式错误 @RequestParam上validate失败后抛出的异常是javax.validation.ConstraintViolationException

    @ExceptionHandler(ConstraintViolationException.class)

    @ResponseBody

    public ResponseVO ConstraintViolationExceptionHandler(ConstraintViolationException e) {

        String message = e.getConstraintViolations().stream().map(ConstraintViolation::getMessage).collect(Collectors.joining());

        return new ResponseVO(message);

    }

    //处理请求参数格式错误 @RequestBody上validate失败后抛出的异常是MethodArgumentNotValidException异常。

    @ExceptionHandler(MethodArgumentNotValidException.class)

    @ResponseBody

    public ResponseVO MethodArgumentNotValidExceptionHandler(MethodArgumentNotValidException e) {

        String message = e.getBindingResult().getAllErrors().stream().map(DefaultMessageSourceResolvable::getDefaultMessage).collect(Collectors.joining());

        return new ResponseVO(message);

    }

}

@RestController

@RequestMapping("test")

public class TestController {

    @GetMapping("refund")

    public ResponseVO refund(@Valid RefundRequest request) throws Exception {

        return new ResponseVO();

    }

}

@Data

public class RefundRequest implements Serializable {

    @NotBlank(message = "订单号不能为空")

    private String orderId;

    @Min(value = 0, message = "已消费金额金额不能为负数")

    private int orderAmt;

}

@Configuration

public class WebConfig {

    @Bean

    public Validator validator() {

        ValidatorFactory validatorFactory = Validation.byProvider(HibernateValidator.class)

                .configure()

                //failFast的意思只要出现校验失败的情况，就立即结束校验，不再进行后续的校验。

                .failFast(true)

                .buildValidatorFactory();

        return validatorFactory.getValidator();

    }

    @Bean

    public MethodValidationPostProcessor methodValidationPostProcessor() {

        MethodValidationPostProcessor methodValidationPostProcessor = new MethodValidationPostProcessor();

        methodValidationPostProcessor.setValidator(validator());

        return methodValidationPostProcessor;

    }

}