jdbc连接数据库

import java.sql.Connection;import java.sql.DriverManager;public class DatabaseConn {private static Connection conn;private String url = "jdbc:mysql://:localhost:3306/user";  private String username = "root";private String password = "123456";private String className = "com.mysql.jdbc.Driver";//数据库驱动类public Connection getConnection() {try {Class.forName(className).newInstance();//加载数据库驱动//获得数据库连接对象conn = DriverManager.getConnection(url, username, password);System.out.println("SUCCESS");} catch (Exception e) {e.printStackTrace();System.out.println("ERROR");}return conn;}}