java - ConstraintValidation 不适用于 Rest Api 请求

Question

我创建了一个 API 并添加了一个自定义注释来验证请求正文对象，但这从未被调用。下面是对象。请检查一下代码并帮我看看代码哪里需要更正？

@NotNull，@Size 也不起作用

请求正文对象

@Getter
@AllArgsConstructor
@Sample
public class SaleRequest {
    @NotNull
    private Integer sale;
    @NotNull
    private Date dateTime;
    @NotNull
    @Size(min = 10, max = 10)
    private String customerId;
}

注释

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = {SalesRequestValidator.class})
@Documented
public @interface Sample {
    Class<?>[] groups() default { };

    Class<? extends Payload>[] payload() default { };


    String message() default "Invalid Sale Request";
}

validator

public class SalesRequestValidator implements ConstraintValidator<Sample, SaleRequest> {
    private String message;

    @Override
    public void initialize(Sample constraintAnnotation) {
        this.message = constraintAnnotation.message();
    }

    @Override
    public boolean isValid(SaleRequest sale, ConstraintValidatorContext context) {
        System.out.println("Tested!");
        return sale.getSale() > 0;
    }

}

API实现

public interface SalesApi {
    @RequestMapping(
            value = {"/sales"},
            produces = {"application/json"},
            consumes = {"application/json"},
            method = {RequestMethod.POST}
    )
    ResponseEntity<Integer> submitSale(@RequestBody @Valid SaleRequest saleRequest);
  }

不知道哪里出了问题

Answer 1

实现看起来不错。

确保您已在希望接收 SaleRequest 请求正文的 Controller 方法中设置了 @Valid 注释。

它应该看起来像这样:addNewSaleRequest(@RequestBody @Valid SaleRequest saleRequest)