SpringBoot 自定义注解实现涉密字段脱敏

import lombok.Getter;
 

@Getter
public enum PrivacyTypeEnum {
 
    
    CUSTOMER,
 
    
    NAME,
 
    
    ID_CARD,
 
    
    PHONE,
 
    
    EMAIL,
 
    
    KEYWORD
}

import com.fasterxml.jackson.annotation.JacksonAnnotationsInside;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
 

@Target(ElementType.FIELD) // 作用在字段上
@Retention(RetentionPolicy.RUNTIME) // class文件中保留，运行时也保留，能通过反射读取到
@JacksonAnnotationsInside // 表示自定义自己的注解PrivacyEncrypt
@JsonSerialize(using = PrivacySerializer.class) // 该注解使用序列化的方式
public @interface PrivacyEncrypt {
 
    
    PrivacyTypeEnum type();
 
    
    int prefixNoMaskLen() default 1;
 
    
    int suffixNoMaskLen() default 1;
 
    
    String symbol() default "*";
}

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.BeanProperty;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.ContextualSerializer;
import com.zk.common.core.domain.enumerate.PrivacyTypeEnum;
import com.zk.common.core.utils.PrivacyUtil;
import java.io.IOException;
import java.util.Objects;
import lombok.AllArgsConstructor;
import lombok.NoArgsConstructor;
import org.apache.commons.lang3.StringUtils;
 
@NoArgsConstructor
@AllArgsConstructor
public class PrivacySerializer extends JsonSerializer<String> implements ContextualSerializer {
 
  // 脱敏类型
  private PrivacyTypeEnum privacyTypeEnum;
  // 前几位不脱敏
  private Integer prefixNoMaskLen;
  // 最后几位不脱敏
  private Integer suffixNoMaskLen;
  // 用什么打码
  private String symbol;
 
  @Override
  public void serialize(final String origin, final JsonGenerator jsonGenerator,
      final SerializerProvider serializerProvider) throws IOException {
    if (StringUtils.isNotBlank(origin) && null != privacyTypeEnum) {
      switch (privacyTypeEnum) {
        case CUSTOMER:
          jsonGenerator.writeString(PrivacyUtil.desValue(origin, prefixNoMaskLen, suffixNoMaskLen, symbol));
          break;
        case NAME:
          jsonGenerator.writeString(PrivacyUtil.hideChineseName(origin));
          break;
        case ID_CARD:
          jsonGenerator.writeString(PrivacyUtil.hideIDCard(origin));
          break;
        case PHONE:
          jsonGenerator.writeString(PrivacyUtil.hidePhone(origin));
          break;
        case EMAIL:
          jsonGenerator.writeString(PrivacyUtil.hideEmail(origin));
          break;
        default:
          throw new IllegalArgumentException("unknown privacy type enum " + privacyTypeEnum);
      }
    }
  }
 
  @Override
  public JsonSerializer<?> createContextual(final SerializerProvider serializerProvider,
      final BeanProperty beanProperty) throws JsonMappingException {
    if (beanProperty != null) {
      if (Objects.equals(beanProperty.getType().getRawClass(), String.class)) {
        PrivacyEncrypt privacyEncrypt = beanProperty.getAnnotation(PrivacyEncrypt.class);
        if (privacyEncrypt == null) {
          privacyEncrypt = beanProperty.getContextAnnotation(PrivacyEncrypt.class);
        }
        if (privacyEncrypt != null) {
          return new PrivacySerializer(privacyEncrypt.type(), privacyEncrypt.prefixNoMaskLen(),
              privacyEncrypt.suffixNoMaskLen(), privacyEncrypt.symbol());
        }
      }
      return serializerProvider.findValueSerializer(beanProperty.getType(), beanProperty);
    }
    return serializerProvider.findNullValueSerializer(null);
  }
}

public class PrivacyUtil {
 
    
    public static String hidePhone(String phone) {
        return phone.replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2");
    }
 
    
    public static String hideEmail(String email) {
        return email.replaceAll("(\\w?)(\\w+)(\\w)(@\\w+\\.[a-z]+(\\.[a-z]+)?)", "$1****$3$4");
    }
 
    
    public static String hideIDCard(String idCard) {
        return idCard.replaceAll("(\\d{4})\\d{10}(\\w{4})", "$1*****$2");
    }
 
    
    public static String hideChineseName(String chineseName) {
        if (chineseName == null) {
            return null;
        }
        return desValue(chineseName, 1, 0, "*");
    }
 

    public static String hideKeyWord(String context) {
        // SpringUtil.getBean()方法来源于hutool提供的工具类。网上也有很多spring静态获取bean的方法，没有hutool依赖的，可自行实现。
        //  实际项目中，请替换为自己的Mapper或者Dao。这里是为大家提供动态获取数据库的示例写法。
        SysSecurityFieldMapper sysSecurityFieldMapper = SpringUtil.getBean(SysSecurityFieldMapper.class);
        List<SysSecurityFieldEntity> privacyKeyWord = sysSecurityFieldMapper.selectList(new LambdaQueryWrapper<SysSecurityFieldEntity>()
                .eq(SysSecurityFieldEntity::getStatus, SecurityFieldConstant.STATUS_NORMAL));
        if (CollectionUtils.isEmpty(privacyKeyWord)) {
            return context;
        }
        for (int i = 0; i < privacyKeyWord.size(); i++) {
            if (context.contains(privacyKeyWord.get(i).getKeyWord())) {
                context = context.replaceAll(privacyKeyWord.get(i).getKeyWord(), "***");
            }
        }
 
        return context;
    }
 
//    
//    public static String hideIdCard(String idCard) {
//        return desValue(idCard, 4, 2, "*");
//    }
 
//    
//    public static String hidePhone(String phone) {
//        return desValue(phone, 3, 4, "*");
//    }
 
    
    public static String desValue(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 void main(String[] args) {
        System.out.println(hideChineseName("张三三"));
    }
}

@Data
public class People {
 
    private Integer id;
 
    private String name;
 
    private Integer sex;
 
    private Integer age;
 
    @PrivacyEncrypt(type = PrivacyTypeEnum.PHONE) // 隐藏手机号
    private String phone;
 
    @PrivacyEncrypt(type = PrivacyTypeEnum.EMAIL) // 隐藏邮箱
    private String email;
 
    private String sign;
}