记录字段的修改记录

小咪咪 2023-10-13 13:17 11阅读 0赞

需要内容  
![在这里插入图片描述][9862af35e9f74514a4c5b4b783812546.png]  
LogCompar接口

@Retention(RetentionPolicy.RUNTIME)
    public @interface  LogCompar {
    
        /**
         * 中文名称
         *
         * @return String
         */
        String name();
    
        /**
         * Date 如何格式化，默认为空
         *
         * @return String
         */
        String dateFormat() default "";
    
    }

抽象的base类

public abstract class Base {
        public abstract Long getId();
    
        abstract EnumTableName getTableName();
    
        //region 生成数据修改日志
        public final static String ADD = "新增";
        public final static String UPDATE = "更新";
        public final static String DELETE = "删除";
    
    
        public <T extends Base> UnityLog createLog(String unityOperate, T oldObj) throws IllegalAccessException {
            //保存操作日志
            UnityLog unityLog = comparatorObject(unityOperate, oldObj);
            unityLog.setId(getId());
            return unityLog;
        }
    
        /**
         * 比较新老对象的差别
         *
         * @param unityOperate
         * @param oldObj
         * @return
         * @throws IllegalAccessException
         */
        private UnityLog comparatorObject(String unityOperate, Object oldObj) throws IllegalAccessException {
            StringBuilder matter = new StringBuilder();
            StringBuilder content = new StringBuilder();
    
            if (oldObj != null && UPDATE.equals(unityOperate)) {
                Map<String, Object> oldMap = changeValueToMap(oldObj);
                Map<String, Object> newMap = changeValueToMap(this);
                if (oldMap != null && !oldMap.isEmpty()) {
                    for (Map.Entry<String, Object> entry : oldMap.entrySet()) {
                        Object oldValue = entry.getValue();
                        Object newValue = newMap.get(entry.getKey());
                        if (!oldValue.equals(newValue)) {
                            matter.append("[").append(entry.getKey()).append("]");
                            content.append(entry.getKey()).append(":").append(oldValue).append("更改为").append(newValue).append(",");
                        }
                    }
                }
            } else {
                matter.append("-");
                content.append("-");
            }
            return UnityLog.builder()
                    .unityOperate(unityOperate)
                    .unityTag(getTableName().getTableName())
                    .unityMatter(String.valueOf(matter))
                    .unityContent(String.valueOf(content))
                    .build();
        }
    
        /**
         * 将类对象转换成Map
         *
         * @param entity 原对象
         * @return Map
         * @throws IllegalAccessException 类型转换时报错
         */
        private static Map<String, Object> changeValueToMap(Object entity) throws IllegalAccessException {
            Map<String, Object> resultMap = new HashMap<>();
            Field[] fields = entity.getClass().getDeclaredFields();
            for (Field field : fields) {
                String name = field.getName();
                if (PropertyUtils.isReadable(entity, name) && PropertyUtils.isWriteable(entity, name)) {
                    if (field.isAnnotationPresent(LogCompar.class)) {
                        LogCompar anno = field.getAnnotation(LogCompar.class);
                        //获取private对象字段值
                        field.setAccessible(true);
                        resultMap.put(anno.name(), field.get(entity));
                    }
                }
            }
            return resultMap;
        }
        //endregion
    }

EnumTableName枚举

public enum EnumTableName {
    
        Person("Person"),
        Province("Province"),
        Income("Income");
    
        EnumTableName(String tableName) {
            this.tableName = tableName;
        }
    
        private String tableName;
    
        public String getTableName() {
            return tableName;
    
        }
    }

Person类继承base 标注修改的字段

public class Person extends Base{
        @LogCompar(name = "id")
        private Long id;
        @LogCompar(name = "姓名")
        private String name;
        @LogCompar(name = "年龄")
        private Integer age;
        @LogCompar(name = "性别")
        private boolean sex;
    
        public Person() {
        }
    
        public Person(Long id, String name, Integer age, boolean sex) {
            this.id = id;
            this.name = name;
            this.age = age;
            this.sex = sex;
        }
    
        public Long getId() {
            return id;
        }
    
        public void setId(Long id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public Integer getAge() {
            return age;
        }
    
        public void setAge(Integer age) {
            this.age = age;
        }
    
        public boolean isSex() {
            return sex;
        }
    
        public void setSex(boolean sex) {
            this.sex = sex;
        }
    
        @Override
        EnumTableName getTableName() {
            return EnumTableName.Person;
        }
    }

UnityLog类

@JsonInclude(value = JsonInclude.Include.NON_NULL)
    public class UnityLog {
        /**
         * id
         */
        private Long id;
    
        /**
         * 数据库表名
         */
        private String unityTag;
    
        /**
         * 数据库表记录id对应的操作日志
         */
        private Long unityTagId;
    
        /**
         * 操作人
         */
        private String unityOperator;
    
        /**
         * 操作时间
         */
        private Date unityOperateTime;
    
        /**
         * 操作类型
         */
        private String unityOperate;
    
        /**
         * 操作事项
         */
        private String unityMatter;
    
        /**
         * 操作内容
         */
        private String unityContent;
    
        public UnityLog(Long id, String unityTag, Long unityTagId, String unityOperator, Date unityOperateTime, String unityOperate, String unityMatter, String unityContent) {
            this.id = id;
            this.unityTag = unityTag;
            this.unityTagId = unityTagId;
            this.unityOperator = unityOperator;
            this.unityOperateTime = unityOperateTime;
            this.unityOperate = unityOperate;
            this.unityMatter = unityMatter;
            this.unityContent = unityContent;
        }
    
        public UnityLog(UnityLogBuilder builder) {
            this.unityTag = builder.unityTag;
            this.unityTagId = builder.unityTagId;
            this.unityOperator = builder.unityOperator;
            this.unityOperate = builder.unityOperate;
            this.unityMatter = builder.unityMatter;
            this.unityContent = builder.unityContent;
        }
    
        public UnityLog() {
            super();
        }
    
        /**
         * id
         *
         * @return id id
         */
        public Long getId() {
            return id;
        }
    
        /**
         * id
         *
         * @param id id
         */
        public void setId(Long id) {
            this.id = id;
        }
    
        /**
         * 数据库表名
         *
         * @return unity_tag 数据库表名
         */
        public String getUnityTag() {
            return unityTag;
        }
    
        /**
         * 数据库表名
         *
         * @param unityTag 数据库表名
         */
        public void setUnityTag(String unityTag) {
            this.unityTag = unityTag == null ? null : unityTag.trim();
        }
    
        /**
         * 数据库表记录id对应的操作日志
         *
         * @return unity_tag_id 数据库表记录id对应的操作日志
         */
        public Long getUnityTagId() {
            return unityTagId;
        }
    
        /**
         * 数据库表记录id对应的操作日志
         *
         * @param unityTagId 数据库表记录id对应的操作日志
         */
        public void setUnityTagId(Long unityTagId) {
            this.unityTagId = unityTagId;
        }
    
        /**
         * 操作人
         *
         * @return unity_operator 操作人
         */
        public String getUnityOperator() {
            return unityOperator;
        }
    
        /**
         * 操作人
         *
         * @param unityOperator 操作人
         */
        public void setUnityOperator(String unityOperator) {
            this.unityOperator = unityOperator == null ? null : unityOperator.trim();
        }
    
        /**
         * 操作时间
         *
         * @return unity_operate_time 操作时间
         */
        public Date getUnityOperateTime() {
            return unityOperateTime;
        }
    
        /**
         * 操作时间
         *
         * @param unityOperateTime 操作时间
         */
        public void setUnityOperateTime(Date unityOperateTime) {
            this.unityOperateTime = unityOperateTime;
        }
    
        /**
         * 操作类型
         *
         * @return unity_operate 操作类型
         */
        public String getUnityOperate() {
            return unityOperate;
        }
    
        /**
         * 操作类型
         *
         * @param unityOperate 操作类型
         */
        public void setUnityOperate(String unityOperate) {
            this.unityOperate = unityOperate == null ? null : unityOperate.trim();
        }
    
        /**
         * 操作事项
         *
         * @return unity_matter 操作事项
         */
        public String getUnityMatter() {
            return unityMatter;
        }
    
        /**
         * 操作事项
         *
         * @param unityMatter 操作事项
         */
        public void setUnityMatter(String unityMatter) {
            this.unityMatter = unityMatter == null ? null : unityMatter.trim();
        }
    
        /**
         * 操作内容
         *
         * @return unity_content 操作内容
         */
        public String getUnityContent() {
            return unityContent;
        }
    
        /**
         * 操作内容
         *
         * @param unityContent 操作内容
         */
        public void setUnityContent(String unityContent) {
            this.unityContent = unityContent == null ? null : unityContent.trim();
        }
    
        public void setIdAndOperator(Long unityTagId, String unityOperator) {
            this.unityTagId = unityTagId;
            this.unityOperator = unityOperator;
        }
    
    
        public static UnityLogBuilder builder() {
            return new UnityLogBuilder();
        }
    
        public static class UnityLogBuilder {
            private String unityTag;
            private Long unityTagId;
            private String unityOperator;
            private String unityOperate;
            private String unityMatter;
            private String unityContent;
    
            public UnityLogBuilder unityTag(String unityTag) {
                this.unityTag = unityTag;
                return this;
            }
    
            public UnityLogBuilder unityTagId(Long unityTagId) {
                this.unityTagId = unityTagId;
                return this;
            }
    
            public UnityLogBuilder unityOperator(String unityOperator) {
                this.unityOperator = unityOperator;
                return this;
            }
    
            public UnityLogBuilder unityOperate(String unityOperate) {
                this.unityOperate = unityOperate;
                return this;
            }
    
            public UnityLogBuilder unityMatter(String unityMatter) {
                this.unityMatter = unityMatter;
                return this;
            }
    
            public UnityLogBuilder unityContent(String unityContent) {
                this.unityContent = unityContent;
                return this;
            }
    
            public UnityLog build() {
                return new UnityLog(this);
            }
        }
    }

test 测试类

public class test {
    
        public static void main(String[] args) {
            Person user1=new Person(1L,"张三",21,true);
            Person user2=new Person(1L,"李四",24,true);
            try {
                UnityLog log = user2.createLog(Base.UPDATE, user1);
                String jsonString = JSON.toJSONString(log);
                System.out.println(jsonString);
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
    }

结果:  
![在这里插入图片描述][1857075d6eca4e6aa071c7557aeb2645.png]  
注：主要逻辑在base中，需要的可自行改造。

[9862af35e9f74514a4c5b4b783812546.png]: https://img-blog.csdnimg.cn/9862af35e9f74514a4c5b4b783812546.png
[1857075d6eca4e6aa071c7557aeb2645.png]: https://img-blog.csdnimg.cn/1857075d6eca4e6aa071c7557aeb2645.png