一、定义一个注解

/**
 * @description: 自定义个注解，用于校验字符串类型的数据是否在指定的范围内
 * @author:zhanghuazheng
 * @createTime:2021/2/4 15:53
 * @version:1.0
 */
@Documented
@Target({ElementType.METHOD, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = { LoanValidate.class})
public @interface FiledEnumRule {

    String[] in() default "";

    String message() default "{javax.validation.constraints.NotEmpty.message}";

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

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

二、编写实现注解的实现

/**
 * @description:
 * @author:zhanghuazheng
 * @createTime:2021/2/4 15:51
 * @version:1.0
 */
@Slf4j
public class LoanValidate implements ConstraintValidator<FiledEnumRule, String> {
    private String[] filedValues = {};

    @Override
    public boolean isValid(String input, ConstraintValidatorContext constraintValidatorContext) {
        log.info("数据校验入参args=" + input);
        List<String> list = Arrays.asList(filedValues);
        if(list.contains(input)){
            return true;
        }
        return false;
    }

    @Override
    public void initialize(FiledEnumRule constraintAnnotation) {
        filedValues = constraintAnnotation.in();
        log.info("数据校验入参args=" + filedValues);
    }
}

三、具体使用

/**
 * @description: 贷款申请信息内部转换模型
 * @author:zhanghuazheng
 * @createTime:2021/1/29 20:16
 * @version:1.0
 */
    @Data
    @Validated
    public  class CustomerInfo implements Serializable {
        private static final long serialVersionUID = 1L;

        @NotEmpty(message = "nationality can not empty")
        @Length(max = 8, message = "nationality 长度不符合要求")
        @FiledEnumRule(in={"CHN","JAP","AMR"},message = "数据不在定义范围内")
        private String nationality;

        @NotEmpty(message = "applyTime can not empty")
        @Length(max = 19, message = "applyTime 长度不符合要求")
        private String applyTime;

        @NotEmpty(message = "purposeOfAccount can not empty")
        @Length(max = 128, message = "purposeOfAccount 长度不符合要求")
        private String purposeOfAccount;
}

标签：String,自定义,default,NotEmpty,校验,private,message,public,对字
来源： https://blog.csdn.net/zhz1605/article/details/113655207