转自 https://docs.oracle.com/javase/tutorial/jdbc/overview/index.html
public void connectToAndQueryDatabase(String username, String password) { // DriverManager.loadInitialDrivers() 通过 SPI 机制加载驱动类,不需再手动写 Class.forName("*.*.DriverClass") Connection con = DriverManager.getConnection( "jdbc:myDriver:myDatabase", username, password); Statement stmt = con.createStatement(); ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM Table1"); while (rs.next()) { int x = rs.getInt("a"); String s = rs.getString("b"); float f = rs.getFloat("c"); } }