利用强大的windowsADO., 连接oracle数据库，该工程已经测试过，能正常使用，使用前需确保本机是否安装了oracle的数据库驱动，若未安装，则连接oracle异常-The use of powerful windowsADO., Oracle database connection, the project has been tested, can be used normally, the use of the former should ensure that the machi