java实现mysql自动更新创建时间与更新时间的两种方式

  create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',

ALTER TABLE `table_name`
ADD COLUMN  `create_time` datetime NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间';

ALTER TABLE `table_name`
ADD COLUMN `update_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '修改时间' 

ALTER TABLE `table_name`
MODIFY COLUMN  `create_time` datetime NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间';

ALTER TABLE `table_name`
MODIFY COLUMN `update_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '修改时间' 

    @TableField(fill = FieldFill.INSERT) 
    private LocalDateTime createTime;

    @TableField(fill = FieldFill.INSERT_UPDATE) 
    private LocalDateTime updateTime;

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.time.LocalDateTime;

/**
 * 自定义元数据对象处理器
 */
@Component
@Slf4j
public class MyMetaObjecthandler implements MetaObjectHandler {
    /**
     * 插入操作，自动填充
     * @param metaObject
     */
    @Override
    public void insertFill(MetaObject metaObject) {
        log.info("公共字段自动填充[insert]...");
       
        metaObject.setValue("createTime", LocalDateTime.now());
        metaObject.setValue("updateTime",LocalDateTime.now());     
    }

    /**
     * 更新操作，自动填充
     * @param metaObject
     */
    @Override
    public void updateFill(MetaObject metaObject) {
        log.info("公共字段自动填充[update]...");

        metaObject.setValue("updateTime",LocalDateTime.now());       
    }
}

default-time-zone=Asia/Shanghai

default-time-zone = '+8:00'

//1、把当前宿主机的时区信息复制到mysql容器的时区中
docker cp /usr/share/zoneinfo/Asia/Shanghai 容器名称或Id:etc/localtime
 
//2、重启mysql服务即可
docker restart 容器名称或Id