一、TbaleMetaObjectHandler 

package com.ybzx.zdbx.common.handler;

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;

import java.util.Date;

@Component
@Slf4j
public class TbaleMetaObjectHandler implements MetaObjectHandler {
    @Override
    public void insertFill(MetaObject metaObject) {
        //判断当前对象的自动填充属性是否包含当前属性
        if (metaObject.hasSetter("ENTERDATE")) {
            //实现填充业务逻辑
            Date now = new Date();
            this.strictInsertFill(metaObject, "ENTERDATE", Date.class, now);
            this.strictInsertFill(metaObject, "MODITM", Date.class, now);
        }
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        if (metaObject.hasSetter("MODITM")) {
            //实现填充业务逻辑
            this.strictUpdateFill(metaObject, "MODITM", Date.class, new Date());
        }
    }
}

二、属性 

每次新增，识别到实体类具有对应的属性就会触发方法填充日期