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一： 通过注解方式
@TableField(update = "NOW()")
/** * 行修改时间 * 该注解可以设置更新时间为数据库服务器当前时间 * 更新操作均适用 *
update/saveOrUpdate/saveOrUpdateBatch/updateById/updateBatchById */
@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss") @TableField(update = "NOW()")
private LocalDateTime updateTime;
二： 注解加组件
@TableField(fill = FieldFill.INSERT_UPDATE) + MetaObjectHandler /** * 行修改时间 *
插入和更新时填充字段 */ @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss") @TableField(fill =
FieldFill.INSERT_UPDATE) private LocalDateTime updateTime; import
cn.hutool.core.date.DateUtil; import cn.hutool.core.date.LocalDateTimeUtil;
import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler; import
org.apache.ibatis.reflection.MetaObject; import
org.springframework.stereotype.Component; import java.util.Date; /** * @author
louis * @description: 元对象字段填充控制器实现类，实现公共字段自动写入 * @date 2022-10-31 * @version
1.0 */ @Component public class MybatisplusHandler implements MetaObjectHandler
{ @Override public void insertFill(MetaObject metaObject) {
this.setFieldValByName("updateTime", LocalDateTimeUtil.now(), metaObject); }
@Override public void updateFill(MetaObject metaObject) {
this.setFieldValByName("updateTime", LocalDateTimeUtil.now(), metaObject); } }
元对象字段填充控制器抽象类，实现公共字段自动写入 com.baomidou.mybatisplus.core.handlers.MetaObjectHandler
