JDBC 连接数据库

有时候需要用jdbc测试数据库的连接性，但是总是记不起来怎么写。 这里还是总结一下，以备后用。

Mysql

String driver = "com.mysql.jdbc.Driver";// 驱动程序名
String dbname = "mydb";
String ip = "192.168.56.50";
String port = "3306";
String username = "root";
String password = "root";

String url = "jdbc:mysql://" + ip + ":" + port + "/" + dbname;

// 加载驱动程序
Class.forName(driver);

// 连接数据库
Connection conn = DriverManager.getConnection(url, username, password);

Oracle

String driver = "oracle.jdbc.driver.OracleDriver";    // 驱动程序名
String dbname = "mydb";
String ip = "192.168.56.50";
String port = "1521";
String user = "root";
String password = "root";

String url = "jdbc:oracle:thin:@" + ip + ":" + port + ":" +dbname;

//加载数据库驱动
Class.forName(driver);
//连接数据库
Connection conn  = DriverManager.getConnection(url, user, password);