Java連接MySQL8.0以上版本

 //1.加載驅動
        Class.forName("com.mysql.cj.jdbc.Driver");
        //2.用戶信息和URL
        String url="jdbc:mysql://localhost:3306/testdb?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT%2B8";
        String username="root";
        String password="123456";
        //3.連接成功，數據庫對象，Connection 代表數據庫
        Connection connection = DriverManager.getConnection(url, username, password);
        //4.執行SQL的對象 statement 執行sql的對象
        Statement statement = connection.createStatement();
        //5.執行SQL的對象 去 執行SQL
        String sql="SELECT * FROM student";
        ResultSet resultSet = statement.executeQuery(sql);//返回的結果集
        while(resultSet.next()){
            System.out.println("id="+resultSet.getObject("id"));
            System.out.println("姓名="+resultSet.getObject("name"));
            System.out.println("年齡="+resultSet.getObject("age"));
            System.out.println("學號="+resultSet.getObject("stunum"));
            System.out.println("***********************************************");
        }
        //6.釋放連接
        resultSet.close();
        statement.close();
        connection.close();