Spring 引导中的 DTO 验证不工作

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% 的比例传递 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：字段的值或属性必须是小于或等于value元素中数字的十进制值。 reference

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

稍后编辑：删除@Data 并添加基本的 getter 和 setter 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

您必须在控制器中添加 ExceptionHandler class:

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;
}

Answer 3

我刚打电话给 maven clean install 并开始验证

Spring 引导中的 DTO 验证不工作

DTO validation in Spring Boot not working

java

spring

hibernate

spring-boot