谷粒商城自定义校验功能

@ListValue(vals={0,1})
private Integer showStatus;

1）、编写一个自定义校验注解

@Documented
@Constraint(validatedBy = {ListValueValidatorForInteger.class})
@Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER, TYPE_USE})
@Retention(RUNTIME)
public @interface ListValue {

    String message() default "{com.atguigu.common.valid.ListValue.message}";

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

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

    int[] vals() default {};
}

编写配置文件com.atguigu.common.valid.ListValue.message

com.atguigu.common.valid.ListValue.message=必须提交指定的值

2）、编写一个自定义校验器

public class ListValueValidatorForInteger implements ConstraintValidator<ListValue, Integer> {
    private Set<Integer> set = new HashSet<>();
    @Override
    public void initialize(ListValue constraintAnnotation) {
        //遍历需要校验的vals
        int[] vals = constraintAnnotation.vals();
        for (int val : vals) {
            //装填到set
            set.add(val);
        }
    }

    //判断是否校验成功      value：需要校验的值
    @Override
    public boolean isValid(Integer value, ConstraintValidatorContext context) {
        return set.contains(value);
    }
}

3）、关联自定义的校验器和自定义的注解

@Constraint(validatedBy = {ListValueValidatorForInteger.class})

标签：set,自定义,校验,谷粒,vals,ListValue,message
来源： https://blog.csdn.net/apple_53947466/article/details/121714232