相关疑难解决方法(0)

我有一个"AllowedValuesValidator.java"类:

public class AllowedValuesValidator implements ConstraintValidator<AllowedValues, String> {

    String[] values;
    String defaultValue;

    @Override
    public void initialize(AllowedValues constraintAnnotation) {
        values = constraintAnnotation.allowedValues();
        defaultValue = constraintAnnotation.defaultValue();
    }

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        if (!StringUtils.isEmpty(defaultValue) && StringUtils.isEmpty(value)) {
            value = defaultValue;
        }

        if (!StringUtils.isEmpty(value) && !Arrays.asList(values).contains(value)) {
            return false;
        }
        return true;
    }
}

和相应的接口类:

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = AllowedValuesValidator.class)
public @interface AllowedValues {

    String message();

    String fieldName();

    int fieldNumber();

    String[] allowedValues() default {"Y", "N"};

    String defaultValue() default "";
} …