java实现pgsql自动更新创建时间与更新时间的两种方式小结

ALTER TABLE idc_order_record 
ADD COLUMN create_time TIMESTAMP DEFAULT (TO_CHAR((NOW() AT TIME ZONE 'Asia/Shanghai'), 'YYYY-MM-DD HH24:MI:SS')::timestamp),
ADD COLUMN update_time TIMESTAMP DEFAULT (TO_CHAR((NOW() AT TIME ZONE 'Asia/Shanghai'), 'YYYY-MM-DD HH24:MI:SS')::timestamp);

CREATE OR REPLACE FUNCTION trigger_set_create_time()
RETURNS TRIGGER AS $$
BEGIN
  NEW.create_time = TO_CHAR(NOW() AT TIME ZONE 'Asia/Shanghai', 'YYYY-MM-DD HH24:MI:SS');
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE OR REPLACE FUNCTION trigger_set_update_time()
RETURNS TRIGGER AS $$
BEGIN
  NEW.update_time = TO_CHAR(NOW() AT TIME ZONE 'Asia/Shanghai', 'YYYY-MM-DD HH24:MI:SS');
  RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER set_create_time
BEFORE INSERT ON idc_order_record
FOR EACH ROW
EXECUTE FUNCTION trigger_set_create_time();

CREATE TRIGGER set_update_time
BEFORE UPDATE ON idc_order_record
FOR EACH ROW
EXECUTE FUNCTION trigger_set_update_time();

DROP TRIGGER IF EXISTS set_create_time ON idc_order_record;

DROP TRIGGER IF EXISTS set_update_time ON idc_order_record;

    @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());       
    }
}