连接各种数据库

String url =  "jdbc:oracle:thin:@localhost:1521:ORCL";
            String user = "scott";
            String password = "tiger";
            
            //1.加载驱动，反射要根据完整的路径查找
            Class.forName("oracle.jdbc.driver.OracleDriver");
             //2.建立连接
            Connection con = DriverManager.getConnection(url,user,password);

Class.forName("com.mysql.jdbc.Driver");     //加载MYSQL JDBC驱动程序     

Connection connect = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root",  "050818" + "");  
// 连接URL为 jdbc:mysql//服务器地址/数据库名 ，后面的2个参数分别是登陆用户名和密码