我一直在使用wamp和mysql为我的java项目使用本地数据库，一切正常。最近我在windows服务器上安装了awsec2vm。安装了wamp和mysql。
我设法让远程访问apache和mysql，因此我能够访问phpmyadmin、db，并通过浏览器使用其地址从外部计算机与之交互：http://15.188.65.36/phpmyadmin/
但是，当我改变了我以前（为我的本地wamp）的工作很好

public static ResultSet execute(String requete) {
        Connection connexion;
        Statement stmt = null;
        ResultSet res = null;
        try {
            connexion = DriverManager.getConnection ("jdbc:mysql://localhost:3306/dbname","user","*********");
            stmt = connexion.createStatement();
            if(stmt.execute(requete)) {
                res = stmt.getResultSet();
            }
        } catch (SQLException e) {

            System.out.println(e.getMessage());
        }
        return res;
    }

对于

public static ResultSet execute(String requete) {
        Connection connexion;
        Statement stmt = null;
        ResultSet res = null;
        try {
            connexion = DriverManager.getConnection ("jdbc:mysql://15.188.65.36:3306/dbname","user","*********");
            stmt = connexion.createStatement();
            if(stmt.execute(requete)) {
                res = stmt.getResultSet();
            }
        } catch (SQLException e) {

            System.out.println(e.getMessage());
        }
        return res;
    }

它不再工作了，似乎无法连接，我收到以下错误：

Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

谢谢你的帮助