一、类功能:
copyright:emperor electric technology of ShenZhen author:tangyingzhong contact:[email protected] version:v1.0.0 date:2018/2/7
a.打开,关闭数据库
b.维护数据库连接状态
copyright:emperor electric technology of ShenZhen author:tangyingzhong contact:[email protected] version:v1.0.0 date:2018/2/7