static

    private String url = "jdbc:mysql://localhost:3306/day17";
    // jdbc协议:数据库子协议:主机:端口/连接的数据库   //

    private String user = "root";//用户名
    private String password = "root";//密码
    
    public static void test1(){
        Class.forName("com.mysql.jdbc.Driver");
        //Class.forName("com.mysql.jdbc.Driver");
        Connection conn = DriverManager.getConnection(url, user, password);
        
        
    }