Spring Boot 中的 DTO 验证不起作用

Question

我有一个带有 POST 方法的控制器：

        @RestController
        @RequestMapping(value = "/creditDetails", produces = MediaType.APPLICATION_JSON_VALUE)
        @RequiredArgsConstructor
        @Validated
        public class CreditDetailsController {
       
            @ResponseStatus(HttpStatus.CREATED)
            @PostMapping(consumes = MediaType.APPLICATION_JSON_VALUE)
            public CreditDetailsResponse createCreditDetails(@RequestBody @Valid CreditDetailsRequestWithoutId request) {
                return CreditDetailsResponse.convertToResponse(creditDetailsService.createCreditDetails(request));
            }
    }

和 DTO：

@Data
@JsonIgnoreProperties(ignoreUnknown = true)
public class CreditDetailsRequestWithoutId {
    @DecimalMax("10_000_000")
    private BigDecimal creditLimit;
    @DecimalMin("0")
    @DecimalMax("20")
    private BigDecimal creditPercent;
    private UUID bankId;
}

当我以 111% 传递 CreditDetailsWithoutId 实例时，我没有收到任何错误。为什么我的验证不起作用？ 如果重要的话我使用

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
            <version>2.6.3</version>
        </dependency>

Answer 1

尝试将十进制值传递给@DecimalMin、@DecimalMax：

@DecimalMax：字段或属性的值必须是小于或等于值元素中的数字的十进制值。 参考

@DecimalMin("0.0")
@DecimalMax("20.0")
private BigDecimal creditPercent;

稍后编辑： 删除 @Data 并添加基本吸气剂和设置者解决了我这边的问题，希望它有效。

// @Data
@JsonIgnoreProperties(ignoreUnknown = true)
public class CreditDetailsRequestWithoutId {

    @DecimalMax("1E+7")
    private BigDecimal creditLimit;

    @DecimalMin("0.0")
    @DecimalMax("20.0")
    private BigDecimal creditPercent;

    public BigDecimal getCreditPercent(){
        return creditPercent;
    }

    public void setCreditPercent(BigDecimal creditPercent){
        this.creditPercent = creditPercent;
    }

    public BigDecimal getCreditLimit(){
        return creditLimit;
    }

    public void setCreditLimit(BigDecimal creditLimit){
        this.creditLimit = creditLimit;
    }
}

Answer 2

我刚刚调用了 maven clean install 并开始了验证

Answer 3

对于我的工作：

pom.xml：

   <dependency>
            <groupId>org.hibernate.validator</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>8.0.1.Final</version>
        </dependency>

控制器：

    @Slf4j
@RestController
@RequestMapping("/api/v1/auth")
public class AuthHubController {
    @PostMapping("/authenticate")
        public ResponseEntity<?> authenticate(HttpServletRequest request, @Validated @RequestBody AuthRequestDto authRequestDto) {
    
    }

Dto：

public class AuthRequestDto {
    @Pattern(regexp = "\\d{16}", message = "Card number must contain exactly 16 digits")
    String cardNumber; //card number
    }

完全@Validated

Answer 4

您必须在控制器类中添加 EExceptionHandler：

import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;


@ResponseStatus(HttpStatus.BAD_REQUEST)
@ExceptionHandler(MethodArgumentNotValidException.class)
public Map<String, String> handleValidationExceptions(MethodArgumentNotValidException ex) {
    Map<String, String> errors = new HashMap<>();
    ex.getBindingResult().getAllErrors().forEach((error) -> {
        String fieldName = ((FieldError) error).getField();
        String errorMessage = error.getDefaultMessage();
        errors.put(fieldName, errorMessage);
    });
    return errors;
}