springboot-自定义校验

Posted 2020-11-22 Bean_zheng

申明：摘录自java知音

 

StartWithValidation.class

@Documented
@Constraint(validatedBy = StartWithValidator.class )
@Target({METHOD, FIELD})
@Retention(RUNTIME)
public @interface StartWithValidation {
    String message() default "不是正确的性别取值范围";
    String start() default "_";
    Class<?>[] groups() default {};
    Class<? extends Payload>[] payload() default {};
    @Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER})
    @Retention(RUNTIME)
    @Documented
    @interface List {
        StartWithValidation[] value();
    }
}

StartWithValidator.class

public class StartWithValidator implements ConstraintValidator<StartWithValidation, String> {
   private String start;
    @Override
    public void initialize(StartWithValidation constraintAnnotation) {
        start = constraintAnnotation.start();
    }

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

        if (!StringUtils.isEmpty(value)) {
            return value.startsWith(start);
        }
        return true;
    }
}
运用

@StartWithValidation(message = "Param ‘address‘ must be start with ‘Beijing‘.", start = "Beijing")
public String address;

解释：
地址必须以Beijing开头，否则校验失败