java – 跨字段验证(JSR 303)问题

我有一个简单的豆,即：

public class MyBean {

  private boolean selected;

  private String someString;

  ...
}

因此,如果selected为true,我希望someString为@NotNull等.

任何提示,链接如何实现这种行为？

谢谢
强尼

解决方法:

您可以通过使用自定义验证器注释MyBean来执行此操作,例如：

@ValidMyBean
public class MyBean {

  private boolean selected;

  private String someString;

  ...
}

ValidMyBean：

@Target({ ElementType.FIELD })
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = MyBeanValidator.class)
public @interface ValidMyBean {

    boolean allViolationMessages() default true;

    Class<?>[] constraints() default {};

    Class<?>[] groups() default {};

    String message() default "{ValidMyBean.message}";

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

MyBeanValidator：

public final class MyBeanValidator implements
        ConstraintValidator<ValidMyBean, MyBean> {

    @Override
    public void initialize(
            @SuppressWarnings("unused") final ValidMyBean constraintAnnotation) {
    }

    @Override
    public boolean isValid(final MyBean value,
            final ConstraintValidatorContext context) {

        boolean isValid = true;
        //your validation here

        return isValid;
    }
}

标签：java,bean-validation
来源： https://codeday.me/bug/20190903/1795326.html