本文主要是介绍使用切面对出参脱敏，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
一共两种用法
（1） 在实体类使用
（2）在有返回值的方法上使用
package com.hmdp.aop.annotation;import com.hmdp.constant.SensitiveType;import java.lang.annotation.*;/*** @Author: ldj* @Date: 2024/03/28/10:22* @Description: 敏感字段注解*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD,ElementType.METHOD})
@Documented
public @interface Desensitized {/*** 脱敏数据类型*/SensitiveType type() default SensitiveType.CUSTOMER;/*** 方法返回值字段脱敏 配置规则 字段名_左不覆盖索引_右不覆盖索引，如password_0_0*/String[] rules() default {};
}
package com.hmdp.aop.aspect;import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.hmdp.aop.annotation.Desensitized;
import com.hmdp.utils.DesensitizedUtil;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.stereotype.Component;import java.util.Arrays;/*** @Author: ldj* @Date: 2024/03/28/14:15* @Description: 去敏切面*/
@Aspect
@Component
public class DesensitizedAspect {@Around("@annotation(com.hmdp.aop.annotation.Desensitized)")public Object desensitize(ProceedingJoinPoint joinPoint) throws Throwable {//前置处理Object[] args = joinPoint.getArgs();System.out.println(Arrays.toString(args));//执行目标方法Object obj = joinPoint.proceed();//后置处理MethodSignature signature = (MethodSignature) joinPoint.getSignature();Desensitized annotation = AnnotationUtils.getAnnotation(signature.getMethod(), Desensitized.class);assert annotation != null;String[] rules = annotation.rules();JSONObject jsonObject = JSONObject.parseObject(JSON.toJSONString(obj));for (String rule : rules) {//password_0_0String[] split = rule.split("_");String fieldName = split[0];String value = (String) jsonObject.get(fieldName);//去敏value = DesensitizedUtil.cover(value, Integer.parseInt(split[1]), Integer.parseInt(split[2]), "*");jsonObject.put(fieldName, value);}return jsonObject.toJavaObject(obj.getClass());}}
package com.hmdp.utils;import com.hmdp.aop.annotation.Desensitized;
import com.hmdp.constant.SensitiveType;
import com.hmdp.entity.User;
import org.apache.commons.lang3.StringUtils;import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;import static com.hmdp.constant.SensitiveType.*;/*** @Author: ldj* @Date: 2024/03/28/9:26* @Description: 脱敏工具类*/
public class DesensitizedUtil<T> {//单个对象public static <T> T desensitize(T t) throws IllegalAccessException {List<Field> sensitiveFields = getSensitiveField(t.getClass());for (Field sensitiveField : sensitiveFields) {Desensitized annotation = sensitiveField.getAnnotation(Desensitized.class);SensitiveType sensitiveType = annotation.type();sensitiveField.setAccessible(true);String value = (String) sensitiveField.get(t);String maskValue = convertByType(value, sensitiveType);sensitiveField.set(t, maskValue);}return t;}//多个对象public static <T> List<T> desensitizes(List<T> ts) throws IllegalAccessException {List<T> list = new ArrayList<>();for (T t : ts) {list.add(desensitize(t));}return list;}private static <T> List<Field> getSensitiveField(Class<T> clazz) {List<Field> tempList = new ArrayList<>();tempList.addAll(Arrays.asList(clazz.getSuperclass().getDeclaredFields()));tempList.addAll(Arrays.asList(clazz.getDeclaredFields()));List<Field> fields = new ArrayList<>();for (Field field : tempList) {if (field.isAnnotationPresent(Desensitized.class)) {fields.add(field);}}return fields;}private static String convertByType(String value, SensitiveType sensitiveType) {switch (sensitiveType) {case CUSTOMER:value = cover(value, CUSTOMER.getPrefixNoMaskLen(), CUSTOMER.getSuffixNoMaskLen(), "*");break;case CHINESE_NAME:value = cover(value, CHINESE_NAME.getPrefixNoMaskLen(), CHINESE_NAME.getSuffixNoMaskLen(), "*");break;case ID_CARD_NUM:value = cover(value, ID_CARD_NUM.getPrefixNoMaskLen(), ID_CARD_NUM.getSuffixNoMaskLen(), "*");break;case MOBILE_PHONE:value = cover(value, MOBILE_PHONE.getPrefixNoMaskLen(), ID_CARD_NUM.getSuffixNoMaskLen(), "*");break;case FIXED_PHONE:value = cover(value, FIXED_PHONE.getPrefixNoMaskLen(), FIXED_PHONE.getSuffixNoMaskLen(), "*");break;case PASSWORD:value = cover(value, PASSWORD.getPrefixNoMaskLen(), PASSWORD.getSuffixNoMaskLen(), "*");break;case BANKCARD:value = cover(value, BANKCARD.getPrefixNoMaskLen(), BANKCARD.getSuffixNoMaskLen(), "*");break;case EMAIL:value = cover(value, EMAIL.getPrefixNoMaskLen(), EMAIL.getSuffixNoMaskLen(), "*");break;case ADDRESS:value = cover(value, ADDRESS.getPrefixNoMaskLen(), ADDRESS.getSuffixNoMaskLen(), "*");break;}return value;}// public static String cover2(String origin, int prefixNoMaskLen, int suffixNoMaskLen, String maskStr) {
// if (origin == null) {
// return null;
// }
//
// StringBuilder sb = new StringBuilder();
// for (int i = 0, n = origin.length(); i < n; i++) {
// if (i < prefixNoMaskLen) {
// sb.append(origin.charAt(i));
// continue;
// }
// if (i > (n - suffixNoMaskLen - 1)) {
// sb.append(origin.charAt(i));
// continue;
// }
// sb.append(maskStr);
// }
// return sb.toString();
// }public static String cover(String s, int prefixNoMaskLen, int suffixNoMaskLen, String symbol) {if (StringUtils.isBlank(s)) {return "";}if (StringUtils.isBlank(symbol)) {symbol = "*";}int length = s.length();if (length > prefixNoMaskLen + suffixNoMaskLen) {String prefix = StringUtils.left(s, prefixNoMaskLen);String suffix = StringUtils.right(s, suffixNoMaskLen);s = StringUtils.rightPad(prefix, StringUtils.length(s) - suffixNoMaskLen, symbol).concat(suffix);}return s;}public static void main(String[] args) throws IllegalAccessException {User user1 = new User().setPhone("13588833061").setPassword("wdergr4594fe!");User user2 = new User().setPhone("13599933061").setPassword("wdergr5464fe!");User user = DesensitizedUtil.desensitize(user1);System.out.println(user1.toString());List<User> desensitizes = DesensitizedUtil.desensitizes(Arrays.asList(user1, user2));System.out.println(desensitizes);}}
package com.hmdp.constant;/*** @Author: ldj* @Date: 2024/03/28/9:50* @Description: 字段敏感类型*/
public enum SensitiveType {/*** 自定义*/CUSTOMER(0,0),/*** 名称**/CHINESE_NAME(1,0),/*** 身份证证件号**/ID_CARD_NUM(0,4),/*** 手机号**/MOBILE_PHONE(3,4),/*** 固定电话*/FIXED_PHONE(0,4),/*** 密码**/PASSWORD(0,0),/*** 银行卡号*/BANKCARD(6,4),/*** 邮箱*/EMAIL(1,4),/*** 地址*/ADDRESS(9,0);private int prefixNoMaskLen;private int suffixNoMaskLen;SensitiveType(int prefixNoMaskLen,int suffixNoMaskLen){this.prefixNoMaskLen = prefixNoMaskLen;this.suffixNoMaskLen = suffixNoMaskLen;}public int getPrefixNoMaskLen() {return prefixNoMaskLen;}public void setPrefixNoMaskLen(int prefixNoMaskLen) {this.prefixNoMaskLen = prefixNoMaskLen;}public int getSuffixNoMaskLen() {return suffixNoMaskLen;}public void setSuffixNoMaskLen(int suffixNoMaskLen) {this.suffixNoMaskLen = suffixNoMaskLen;}}
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