技術標籤：Mysql

// 1.註冊驅動
        Class.forName("com.mysql.cj.jdbc.Driver");
        // 2.獲取連線
        String url = "jdbc:mysql://localhost:3306/mybatis?useSSL=false&useUnicode=true&characterEncoding=UTF8&serverTimezone=GMT";
        String username = "root";
        String password =
 
 "123456";
        Connection conn = DriverManager.getConnection(url,username,password);
        // 3.建立PreparedStatement物件
        PreparedStatement ps = conn.prepareStatement("select * from user ");
        // 4.執行Sql
        ResultSet rs = ps.executeQuery();
        // 5.處理結果集
        while
 
 (rs.next()) {
            // 輸出名字
            System.out.println(rs.getString("username"));
        }
        // 6.關閉資源
        ps.close();
        ps.close();
        conn.close();