如何在 Spring Boot 应用程序中使用 Hibernate Validation 进行 Bean Validation？

Question

我正在 Spring 引导应用程序中学习 Hibernate 验证，我有一个 Rest 控制器和一个 POST 方法。当我发出请求时，如果某个字段未成功验证，客户端应该会收到 400 Bad Request 并在正文中收到这样的消息 "validation failed"。我尝试这样做，但没有收到消息。

这是正文：

{
    "timestamp": "2020-06-06T07:56:11.377+00:00",
    "status": 400,
    "error": "Bad Request",
    "message": "",
    "path": "/ibantowallet"
}

在控制台日志中我得到：

2020-06-06 10:56:11.371  WARN 7552 --- [nio-8080-exec-8] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.web.bind.MethodArgumentNotValidException: Validation failed for argument [0] in public org.springframework.http.ResponseEntity com.dgs.demotrans.api.TransactionController.sendMoneyIbanToWallet(com.dgs.demotrans.request.IbanToWalletRequest): [Field error in object 'ibanToWalletRequest' on field 'fromIban': rejected value [FR9151000 0000 0123 4567 89]; codes [Pattern.ibanToWalletRequest.fromIban,Pattern.fromIban,Pattern.java.lang.String,Pattern]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [ibanToWalletRequest.fromIban,fromIban]; arguments []; default message [fromIban],[Ljavax.validation.constraints.Pattern$Flag;@3c555785,[a-zA-Z]{2}\d{2}[ ]\d{4}[ ]\d{4}[ ]\d{4}[ ]\d{4}[ ]\d{2}|DE\d{20}]; default message [IBAN validation failed]] ]

所以消息是空的，我想让客户端收到特定消息"IBAN validation failed"或"Please provide an amount"等，我该怎么做？提前致谢！

Answer 1

您要么必须创建一个 ControllerAdvice 方法来处理 MethodArgumentNotValidException，hibernate 验证器抛出的错误，如本例所示：

    @ResponseStatus(BAD_REQUEST)
    @ResponseBody
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public CustomError methodArgumentNotValidException(MethodArgumentNotValidException ex) {
        BindingResult result = ex.getBindingResult();
        List<org.springframework.validation.FieldError> fieldErrors = result.getFieldErrors();
        return mapToCustomError(fieldErrors);
    }

或者您可以在您的控制器方法中注入 BindingResult 并检查验证是否失败：

    @PostMapping("/ibantoiban")
    public ResponseEntity<String> sendMoneyIbanToIban(@Valid @RequestBody IbanToIbanRequest ibanToIbanRequest, BindingResult bindingResult) {
        if (bindingResult.hasErrors()) { /** handle error here */ }
        Transaction transaction = transactionService.sendMoneyIbanToIban(ibanToIbanRequest);

        HttpHeaders headers = new HttpHeaders();
        headers.add("Location", "/ibantoiban" + transaction.getTransactionId().toString());
        return new ResponseEntity(headers, HttpStatus.CREATED);
    }

如何在 Spring Boot 应用程序中使用 Hibernate Validation 进行 Bean Validation？

How to do Bean Validation with Hibernate Validation in Spring Boot app?

java

rest

hibernate

bean-validation

spring-boot