实体字段比较器（对比两组对象找出发生变化的字段工具类开发）
支持枚举映射
支持时间
支持显示对应字段中文描述
支持嵌套list等场景
下载地址 ：
Java-对比两组对象找出发生变化的字段工具-支持枚举映射-支持时间-支持显示对应字段中文描述-嵌套list等场景-超越其他工具.rar
最新版本更新
https://code.jiangjiesheng.cn/article/366?from=csdn
package cn.jiangjiesheng.annoation.entitycomparator.demo;
import cn.hutool.core.date.DateUtil;
import cn.hutool.json.JSONUtil;
import cn.jiangjiesheng.service.impl.common.entitycomparator.demo.bizentity.SubTask;
import cn.jiangjiesheng.service.impl.common.entitycomparator.demo.bizentity.Task;
import cn.jiangjiesheng.service.impl.common.entitycomparator.demo.bizenum.Enum1Priority;
import cn.jiangjiesheng.service.impl.common.entitycomparator.demo.bizenum.Enum2Status;
import cn.jiangjiesheng.service.impl.common.entitycomparator.demo.bizenum.Enum3Type;
import cn.jiangjiesheng.service.impl.common.entitycomparator.impl.EntityComparator;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
/**
* 对比两组对象找出发生变化的字段工具类 测试验证
*/
public class EntityComparatorDemo {
public static void main(String[] args) throws Exception {
String dateStr = "2025-03-04 12";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH");
// 解析字符串为LocalDateTime对象
LocalDateTime localDateTime = LocalDateTime.parse(dateStr, formatter);
// 如果需要转换为旧的Date类型
Date date = java.sql.Timestamp.valueOf(localDateTime);
SubTask oldSubTask = new SubTask("SubTaskOld", date, Enum2Status.PENDING, "2025-01-01");
SubTask newSubTask = new SubTask("SubTaskNew", DateUtil.beginOfWeek(new Date()), Enum2Status.COMPLETED, "2025-01-02");
List<SubTask> oldSubTasks = new ArrayList<>();
oldSubTasks.add(oldSubTask);
List<SubTask> newSubTasks = new ArrayList<>();
newSubTasks.add(newSubTask);
//再来一组，老的是空
newSubTasks.add(newSubTask);
Task oldTask = new Task(Enum1Priority.LOW, Enum2Status.PENDING, Enum3Type.TYPE_A.getCode(), oldSubTasks, oldSubTask, "2025-01-01");
Task newTask = new Task(Enum1Priority.HIGH, Enum2Status.COMPLETED, Enum3Type.TYPE_B.getCode(), newSubTasks, newSubTask, "2025-01-02");
List<EntityComparator.ChangeInfo> changes = EntityComparator.compareEntities(oldTask, newTask);
// for (ChangeInfo change : changes) {
// System.out.println("Field: " + change.getFieldName());
// System.out.println("Description: " + change.getFieldDesc());
// System.out.println("Old Value: " + change.getOldValue());
// System.out.println("New Value: " + change.getNewValue());
// System.out.println();
// }
//这个保持了顺序，但是json结构混乱
System.out.println("保持了顺序，但是json结构混乱：");
System.out.println(EntityComparator.ChangeInfo.toOrderedJson(changes));
System.out.println();
// 这个未保持顺序，但是json结构清晰
System.out.println("未保持顺序，但是json结构清晰：");
System.err.println(JSONUtil.toJsonPrettyStr(changes));
}
}对比结果示例：
[ {
"fieldDesc" : "任务优先级",
"fieldName" : "enum1Priority",
"newValue" : "高优先级",
"oldValue" : "低优先级"
},
{
"fieldDesc" : "任务状态",
"fieldName" : "enum2Status",
"newValue" : "已完成",
"oldValue" : "待处理"
},
{
"fieldDesc" : "任务类型",
"fieldName" : "taskType",
"newValue" : "类型B",
"oldValue" : "类型A"
},
{
"child" : [
[ {
"fieldName" : "subTasks[0].name",
"fieldDesc" : "子任务名称",
"oldValue" : "",
"newValue" : "SubTaskNew"
},
{
"fieldName" : "subTasks[0].dateTime",
"fieldDesc" : "时间日期类型",
"oldValue" : "",
"newValue" : "2025-04-07 00"
},
{
"fieldName" : "subTasks[0].enum2Status",
"fieldDesc" : "子任务状态",
"oldValue" : "",
"newValue" : "已完成"
},
{
"fieldName" : "subTasks[0].createdAt",
"fieldDesc" : "创建时间",
"oldValue" : "",
"newValue" : "2025-01-02"
} ],
[ {
"fieldName" : "subTasks[1].name",
"fieldDesc" : "子任务名称",
"oldValue" : "",
"newValue" : "SubTaskNew"
},
{
"fieldName" : "subTasks[1].dateTime",
"fieldDesc" : "时间日期类型",
"oldValue" : "",
"newValue" : "2025-04-07 00"
},
{
"fieldName" : "subTasks[1].enum2Status",
"fieldDesc" : "子任务状态",
"oldValue" : "",
"newValue" : "已完成"
},
{
"fieldName" : "subTasks[1].createdAt",
"fieldDesc" : "创建时间",
"oldValue" : "",
"newValue" : "2025-01-02"
} ],
[ {
"fieldName" : "subTasks[2].name",
"fieldDesc" : "子任务名称",
"oldValue" : "",
"newValue" : "SubTaskNew"
},
{
"fieldName" : "subTasks[2].dateTime",
"fieldDesc" : "时间日期类型",
"oldValue" : "",
"newValue" : "2025-04-07 00"
},
{
"fieldName" : "subTasks[2].enum2Status",
"fieldDesc" : "子任务状态",
"oldValue" : "",
"newValue" : "已完成"
},
{
"fieldName" : "subTasks[2].createdAt",
"fieldDesc" : "创建时间",
"oldValue" : "",
"newValue" : "2025-01-02"
}
]
],
"fieldDesc" : "子任务列表",
"fieldName" : "subTasks"
},
{
"fieldDesc" : "子任务名称",
"fieldName" : "subTask.name",
"newValue" : "SubTaskNew",
"oldValue" : "SubTaskOld"
},
{
"fieldDesc" : "时间日期类型",
"fieldName" : "subTask.dateTime",
"newValue" : "2025-04-07 00",
"oldValue" : "2025-03-04 12"
},
{
"fieldDesc" : "子任务状态",
"fieldName" : "subTask.enum2Status",
"newValue" : "已完成",
"oldValue" : "待处理"
},
{
"fieldDesc" : "创建时间",
"fieldName" : "subTask.createdAt",
"newValue" : "2025-01-02",
"oldValue" : "2025-01-01"
},
{
"fieldDesc" : "创建时间",
"fieldName" : "createdAt",
"newValue" : "2025-01-02",
"oldValue" : "2025-01-01"
} ]