小编Saj*_*ran的帖子

我正在使用下面给出的 ConstraintValidator 实现来验证 Spring Boot REST 服务的请求对象

@Target({ FIELD, METHOD, PARAMETER, ANNOTATION_TYPE })
@Retention(RUNTIME)
@Constraint(validatedBy = MyRequestValidator.class)
@Documented
public @interface MyRequestValidation {

    String message() default "Mandatory fields missing";

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

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

public class MyRequestValidator
            implements
                ConstraintValidator<MyRequestValidation, MyRequest>{
   @Override
    public void initialize(MyRequestValidation constraintAnnotation) {
        // Nothing to do here
    }
   @Override
    public boolean isValid(MyRequest myRequest, ConstraintValidatorContext context) {
 //do some validation
     context.disableDefaultConstraintViolation();    
     context.buildConstraintViolationWithTemplate("Id can contain only alphabets and digits")
    .addPropertyNode("id")
    .addConstraintViolation();
   }
} …