MySql和Oracle数据库的驱动和ＵＲＬ连接
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String driverClassName＝"com.mysql.jdbc.Driver"；
String url="jdbc:mysql://localhost/mysql";
String username="scott";
String password="tiger";


Ｏｒａｃｌｅ
String driverClassName="oracle.jdbc.driver.OracleDriver";
String url="jdbc:oracle:thin:@localhost:1521:ORACLE";
String username="scott";
String password="tiger";