SpringBoot使用自定义注解实现数据脱敏过程详细解析

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SpringBoot使用自定义注解实现数据脱敏过程详细解析

码农-文若书生   2023-03-21 我要评论

前言

对于某些接口返回的信息，涉及到敏感数据的必须进行脱敏操作，例如银行卡号、SFZ号、手机号等，脱敏方式有多种方式。可以修改SQL语句，也可以写硬代码，也可以修改JSON序列化，这里介绍通过修改Jackson序列化方式实现数据脱敏。

一、引入hutool工具类

maven:

<dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.8.5</version>
</dependency>

gradle:

// https://mvnrepository.com/artifact/cn.hutool/hutool-all
implementation group: 'cn.hutool', name: 'hutool-all', version: '5.8.5'

二、定义常用需要脱敏的数据类型的枚举

其中 OTHER类型为自定义类型，需在后面自定义脱敏的长度等。

package com.iscas.authentication.model.enums;
import lombok.Getter;
/**
 *
 * @version 1.0
 * @since jdk1.8
 */
@Getter
public enum PrivacyTypeEnum {
    /**
     * 中文名
     * */
    CHINESE_NAME,
    /**
     * 固话
     * */
    FIXED_PHONE,
    /**
     * 手机号
     * */
     MOBILE_PHONE,
    /**
     * 住址
     * */
    ADDRESS,
    /**
     * 密码
     * */
    PASSWORD,
    /**
     * 银行卡号
     * */
    BANK_CARD,
    /**
     * 邮箱
     * */
    EMAIL,
    /**
     * SFZ
     * */
    ID_CARD,
    /**
     * 其他类型
     * */
    OTHER;
}

三、定义脱敏方式枚举

其中，DEFAULT类型时，需要数据类型为上一步枚举中除OTHER外的已确定的类型，NONE表示不做脱敏，其他类型为注释的意思。

package com.iscas.authentication.model.enums;
/**
 *
 * @version 1.0
 * @since jdk1.8
 */
public enum DesensitizationTypeEnum {
    /**
     * 默认方式
     * */
    DEFAULT,
    /**
     * 头部脱敏
     * */
    HEAD,
    /**
     * 尾部脱敏
     * */
    TAIL,
    /**
     * 中间脱敏
     * */
    MIDDLE,
    /**
     * 头尾脱敏
     * */
    HEAD_TAIL,
    /**
     * 全部脱敏
     * */
    ALL,
    /**
     * 不脱敏，相当于没打这个注解
     * */
    NONE;
}

四、自定义脱敏的注解

其中，mode默认为DEFAULT，此时只需要设置dataType的类型为除OTHER外的确定类型即可，当mode不是DEFAULT或NONE时，根据不同的类型，headNoMaskLen等长度属性需要设置，见上面的注释的字面意思。

package com.iscas.authentication.annotation;
import com.fasterxml.jackson.annotation.JacksonAnnotationsInside;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.iscas.authentication.model.enums.DesensitizationTypeEnum;
import com.iscas.authentication.model.enums.PrivacyTypeEnum;
import com.iscas.authentication.service.DesensitizationSerializer;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
 * 脱敏注解
 *
 * @version 1.0
 * @since jdk1.8
 */
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@JacksonAnnotationsInside
@JsonSerialize(using = DesensitizationSerializer.class)
public @interface Desensitization {
    /**
     * 脱敏的隐私数据类型
     */
    PrivacyTypeEnum dataType();
    /**
     * 脱敏方式,默认方式不需要定义下面脱敏长度等信息，根据脱敏的隐私数据类型自动脱敏
     */
    DesensitizationTypeEnum mode() default DesensitizationTypeEnum.DEFAULT;
    /**
     * 尾部不脱敏的长度，当mode为HEAD或MIDDLE时使用
     */
    int tailNoMaskLen() default 1;
    /**
     * 头部不脱敏的长度，当mode为TAIL或MIDDLE时使用
     */
    int headNoMaskLen() default 1;
    /**
     * 中间不脱敏的长度，当mode为HEAD_TAIL时使用
     */
    int middleNoMaskLen() default 1;
    /**
     * 打码
     */
    char maskCode() default '*';
}

五、自定义Jackson的序列化方式

package com.iscas.authentication.service;
import cn.hutool.core.util.DesensitizedUtil;
import cn.hutool.core.util.StrUtil;
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.iscas.authentication.annotation.Desensitization;
import com.iscas.authentication.model.enums.DesensitizationTypeEnum;
import com.iscas.authentication.model.enums.PrivacyTypeEnum;
import lombok.AllArgsConstructor;
import lombok.NoArgsConstructor;
import java.io.IOException;
import java.util.Objects;
/**
 * 脱敏序列化类
 *
 * @author zhuquanwen
 * @version 1.0
 * @date 2023/1/5 9:24
 * @since jdk1.8
 */
@AllArgsConstructor
@NoArgsConstructor
public class DesensitizationSerializer extends JsonSerializer<String> implements ContextualSerializer {
    private Desensitization desensitization;
    @Override
    public void serialize(String s, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
        jsonGenerator.writeString(desensitize(s));
    }
    @Override
    public JsonSerializer<?> createContextual(SerializerProvider serializerProvider, BeanProperty beanProperty) throws JsonMappingException {
        if (beanProperty != null) {
            if (Objects.equals(beanProperty.getType().getRawClass(), String.class)) {
                Desensitization desensitization = beanProperty.getAnnotation(Desensitization.class);
                if (desensitization == null) {
                    desensitization = beanProperty.getContextAnnotation(Desensitization.class);
                }
                if (desensitization != null) {
                    return new DesensitizationSerializer(desensitization);
                }
            }
            return serializerProvider.findValueSerializer(beanProperty.getType(), beanProperty);
        }
        return serializerProvider.findNullValueSerializer(null);
    }
    /**
     * 脱敏处理
     * */
    private String desensitize(String s) {
        if (StrUtil.isNotBlank(s)) {
            PrivacyTypeEnum dataType = desensitization.dataType();
            DesensitizationTypeEnum mode = desensitization.mode();
            switch (mode) {
                case DEFAULT:
                    // 默认方式，根据dataType自动选择脱敏方式
                    s = autoDesensitize(s, dataType);
                    break;
                case HEAD:
                    // 头部脱敏
                    s = headDesensitize(s);
                    break;
                case TAIL:
                    // 尾部脱敏
                    s = tailDesensitize(s);
                    break;
                case MIDDLE:
                    s = middleDesensitize(s);
                    break;
                case HEAD_TAIL:
                    s = headTailDesensitize(s);
                    break;
                case ALL:
                    s = allDesensitize(s);
                    break;
                case NONE:
                    // 不做脱敏
                    break;
                default:
            }
        }
        return s;
    }
    /**
     * 全部脱敏
     * */
    private String allDesensitize(String s) {
        return String.valueOf(desensitization.maskCode()).repeat(s.length());
    }
    /**
    * 头尾脱敏
    * */
    private String headTailDesensitize(String s) {
        int middleNoMaskLen = desensitization.middleNoMaskLen();
        if (middleNoMaskLen >= s.length()) {
            // 如果中间不脱敏的长度大于等于字符串的长度，不进行脱敏
            return s;
        }
        int len = s.length() - middleNoMaskLen;
        // 头部脱敏
        int headStart = 0;
        int headEnd = len / 2;
        s = StrUtil.replace(s, headStart, headEnd, desensitization.maskCode());
        // 尾部脱敏
        int tailStart = s.length() - (len - len / 2);
        int tailEnd = s.length();
        return StrUtil.replace(s, tailStart, tailEnd, desensitization.maskCode());
    }
    /**
     * 中间脱敏
     * */
    private String middleDesensitize(String s) {
        int headNoMaskLen = desensitization.headNoMaskLen();
        int tailNoMaskLen = desensitization.tailNoMaskLen();
        if (headNoMaskLen + tailNoMaskLen >= s.length()) {
            // 如果头部不脱敏的长度+尾部不脱敏长度 大于等于字符串的长度，不进行脱敏
            return s;
        }
        int start = headNoMaskLen;
        int end = s.length() - tailNoMaskLen;
        return StrUtil.replace(s, start, end, desensitization.maskCode());
    }
    /**
     * 尾部脱敏
     * */
    private String tailDesensitize(String s) {
        int headNoMaskLen = desensitization.headNoMaskLen();
        if (headNoMaskLen >= s.length()) {
            // 如果头部不脱敏的长度大于等于字符串的长度，不进行脱敏
            return s;
        }
        int start = headNoMaskLen;
        int end = s.length();
        return StrUtil.replace(s, start, end, desensitization.maskCode());
    }
    /**
     * 头部脱敏
     * */
    private String headDesensitize(String s) {
        int tailNoMaskLen = desensitization.tailNoMaskLen();
        if (tailNoMaskLen >= s.length()) {
            // 如果尾部不脱敏的长度大于等于字符串的长度，不进行脱敏
            return s;
        }
        int start = 0;
        int end = s.length() - tailNoMaskLen;
        return StrUtil.replace(s, start, end, desensitization.maskCode());
    }
    public static void main(String[] args) {
        System.out.println(StrUtil.replace("231085198901091813", 2, -10, '#'));
    }
    /**
     * 根据数据类型自动脱敏
     * */
    private String autoDesensitize(String s, PrivacyTypeEnum dataType) {
        switch (dataType) {
            case CHINESE_NAME:
                s = DesensitizedUtil.chineseName(s);
                break;
            case FIXED_PHONE:
                s = DesensitizedUtil.fixedPhone(s);
                break;
            case MOBILE_PHONE:
                s = DesensitizedUtil.mobilePhone(s);
                break;
            case ADDRESS:
                s = DesensitizedUtil.address(s, 8);
                break;
            case PASSWORD:
                s = DesensitizedUtil.password(s);
                break;
            case BANK_CARD:
                s = DesensitizedUtil.bankCard(s);
                break;
            case EMAIL:
                s = DesensitizedUtil.email(s);
                break;
            case ID_CARD:
                s = DesensitizedUtil.idCardNum(s, 1, 2);
                break;
            case OTHER:
                // 其他类型的不支持以默认方式脱敏，直接返回
                break;
            default:
        }
        return s;
    }
}

六、使用

下面是一个测试的例子：

package com.iscas.base.biz.test.controller;
import com.iscas.base.biz.desensitization.Desensitization;
import com.iscas.base.biz.desensitization.DesensitizationTypeEnum;
import com.iscas.base.biz.desensitization.PrivacyTypeEnum;
import lombok.Data;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
/**
 *
 * @author zhuquanwen
 * @version 1.0
 * @date 2023/1/6 8:40
 * @since jdk1.8
 */
@RestController
@RequestMapping("/test/desensitization")
public class TestDesensitizationController {
    @GetMapping
    public List<TestModel> test() {
        TestModel t1 = new TestModel();
        t1.setPassword("123456");
        t1.setEmail("zzz@163.com");
        t1.setPhone("137654879451");
        t1.setFixPhone("0453-4785462");
        t1.setBankCard("622648754896457");
        t1.setIdCard("245874563214578965");
        t1.setName("张王钊");
        t1.setAddress("北京市昌平区xxx街道xxx小区1-1-101");
        t1.setHeadStr("测试头部脱敏");
        t1.setTailStr("测试尾部脱敏");
        t1.setMiddleStr("测试中间脱敏");
        t1.setHeadTailStr("测试头尾脱敏");
        t1.setAllStr("测试全部脱敏");
        t1.setNoneStr("测试不脱敏");
        TestModel t2 = new TestModel();
        t2.setPassword("iscas123");
        t2.setEmail("xwg@sina.com");
        t2.setPhone("18547896547");
        t2.setFixPhone("010-62268795");
        t2.setBankCard("622648754896487");
        t2.setIdCard("100412547865478947");
        t2.setName("李二麻子");
        t2.setAddress("新疆省克拉玛依市xxx街道xxx小区1-1-101");
        t2.setHeadStr("测试头部脱敏");
        t2.setTailStr("测试尾部脱敏");
        t2.setMiddleStr("测试中间脱敏");
        t2.setHeadTailStr("测试头尾脱敏");
        t2.setAllStr("测试全部脱敏");
        t2.setNoneStr("测试不脱敏");
        return new ArrayList<>(){{
            add(t1);
            add(t2);
        }};
    }
    @Data
    private static class TestModel {
        /**
         * 模拟密码
         * */
        @Desensitization(dataType = PrivacyTypeEnum.PASSWORD)
        private String password;
        /**
         * 模拟邮箱
         * */
        @Desensitization(dataType = PrivacyTypeEnum.EMAIL)
        private String email;
        /**
         * 模拟手机号
         * */
        @Desensitization(dataType = PrivacyTypeEnum.MOBILE_PHONE)
        private String phone;
        /**
         * 模拟座机
         * */
        @Desensitization(dataType = PrivacyTypeEnum.FIXED_PHONE)
        private String fixPhone;
        /**
         * 模拟银行卡
         * */
        @Desensitization(dataType = PrivacyTypeEnum.BANK_CARD)
        private String bankCard;
        /**
         * 模拟SFZ号
         * */
        @Desensitization(dataType = PrivacyTypeEnum.ID_CARD)
        private String idCard;
        /**
         * 模拟中文名
         * */
        @Desensitization(dataType = PrivacyTypeEnum.CHINESE_NAME)
        private String name;
        /**
         * 模拟住址
         * */
        @Desensitization(dataType = PrivacyTypeEnum.ADDRESS)
        private String address;
        /**
         * 模拟自定义脱敏-头部脱敏
         * */
        @Desensitization(dataType = PrivacyTypeEnum.OTHER, mode = DesensitizationTypeEnum.HEAD, tailNoMaskLen = 4)
        private String headStr;
        /**
         * 模拟自定义脱敏-尾部脱敏
         * */
        @Desensitization(dataType = PrivacyTypeEnum.OTHER, mode = DesensitizationTypeEnum.TAIL, headNoMaskLen = 4)
        private String tailStr;
        /**
         * 模拟自定义脱敏-中间脱敏
         * */
        @Desensitization(dataType = PrivacyTypeEnum.OTHER, mode = DesensitizationTypeEnum.MIDDLE, headNoMaskLen = 2, tailNoMaskLen = 2)
        private String middleStr;
        /**
         * 模拟自定义脱敏-两头脱敏
         * */
        @Desensitization(dataType = PrivacyTypeEnum.OTHER, mode = DesensitizationTypeEnum.HEAD_TAIL, middleNoMaskLen = 4)
        private String headTailStr;
        /**
         * 模拟自定义脱敏-全部脱敏
         * */
        @Desensitization(dataType = PrivacyTypeEnum.OTHER, mode = DesensitizationTypeEnum.ALL)
        private String allStr;
        /**
         * 模拟自定义脱敏-不脱敏
         * */
        @Desensitization(dataType = PrivacyTypeEnum.OTHER, mode = DesensitizationTypeEnum.NONE)
        private String noneStr;
    }
}

下面是一个实际使用的例子如下，在tel、password、email上添加了@Desensitization注解，自定义的@TbField等注解请忽略

package com.iscas.authentication.model.sys;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import com.iscas.authentication.annotation.Desensitization;
import com.iscas.authentication.model.enums.PrivacyTypeEnum;
import com.iscas.templet.annotation.table.TbField;
import com.iscas.templet.annotation.table.TbFieldRule;
import com.iscas.templet.annotation.table.TbSetting;
import com.iscas.templet.view.table.TableFieldType;
import com.iscas.templet.view.table.TableSearchType;
import com.iscas.templet.view.table.TableViewType;
import io.swagger.v3.oas.annotations.media.Schema;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import lombok.experimental.Accessors;
import java.util.List;
/**
 * @author zhuquanwen
 * @version 1.0
 * @date 2022/3/11 21:23
 * @since jdk11
 */
@Data
@EqualsAndHashCode(callSuper = true)
@ToString(callSuper = true)
@Schema(title = "用户")
@TableName(value = "oauth_sys_user")
@Accessors(chain = true)
@TbSetting(title = "用户", checkbox = true, viewType = TableViewType.multi)
public class User extends BaseEntity {
    @TableId(type = IdType.AUTO)
    @Schema(title = "id")
    @TbField(field = "id", header = "id",
            type = TableFieldType.text, hidden = true)
    private Integer id;
    @Schema(title = "用户名")
    @TbField(field = "name", header = "名称", search = true, searchType = TableSearchType.like,
            type = TableFieldType.text, rule=@TbFieldRule(required = true, minLength = 2, maxLength = 20, distinct = true, desc = "用户名不能为空，且长度介于2-20个字符之间"))
    private String name;
    @Schema(title = "密码")
    @TbField(field = "password", header = "密码", hidden = true, editable = false,
            type = TableFieldType.text)
    @Desensitization(dataType = PrivacyTypeEnum.PASSWORD)
    private String password;
    @Schema(title = "type")
    @TbField(field = "type", header = "用户类型", search = true, searchType = TableSearchType.exact,
            type = TableFieldType.select, option = "[{\"label\":\"正常用户\",\"value\":\"1\"},{\"label\":\"战位IP用户\",\"value\":\"2\"}]")
    private String type;
    @Schema(title = "status")
    @TbField(field = "status", header = "状态", search = true, searchType = TableSearchType.exact,
            type = TableFieldType.select, option = "[{\"label\":\"正常\",\"value\":\"1\"},{\"label\":\"禁用\",\"value\":\"0\"}]")
    private String status;
    @Schema(title = "真实姓名")
    @TbField(field = "realName", header = "真实姓名",
            type = TableFieldType.text, rule=@TbFieldRule(required = true, minLength = 2, maxLength = 20, desc = "真实姓名不能为空，且长度介于2-20个字符之间"))
    private String realName;
    @Schema(title = "电话号码")
    @TbField(field = "tel", header = "电话号码",
            type = TableFieldType.text, rule=@TbFieldRule(reg = "^(13[0-9]|14[01456879]|15[0-3,5-9]|16[2567]|17[0-8]|18[0-9]|19[0-3,5-9])\\d{8}$", desc = "电话号码需符规则"))
    @Desensitization(dataType = PrivacyTypeEnum.MOBILE_PHONE)
    private String tel;
    @Schema(title = "邮箱")
    @TbField(field = "email", header = "邮箱",
            type = TableFieldType.text, rule=@TbFieldRule(reg = "^\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*.\\w+([-.]\\w+)*$", desc = "邮箱需符规则"))
    @Desensitization(dataType = PrivacyTypeEnum.EMAIL)
    private String email;
    @Schema(title = "部门")
    @TbField(field = "orgIds", header = "部门",
            type = TableFieldType.multiSelect, selectUrl = "/api/v1/orgs/combobox/tree?status=1")
    @TableField(exist = false)
    private List<Integer> orgIds;
    @Schema(title = "角色")
    @TbField(field = "roleIds", header = "角色",
            type = TableFieldType.multiSelect, selectUrl = "/api/v1/roles/combobox?status=1")
    @TableField(exist = false)
    private List<Integer> roleIds;
    @Schema(title = "岗位")
    @TbField(field = "postIds", header = "岗位",
            type = TableFieldType.multiSelect, selectUrl = "/api/v1/posts/combobox?status=1")
    @TableField(exist = false)
    private List<Integer> postIds;
}

七、脱敏效果

下面是测试的结果：

下面是一个查询接口返回带User实体的结果：

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