java - 无法连接到我的数据库 000webhost.com

Question

  try {
        String connectionURL = "jdbc:mysql://sql4.000webhost.com/a7291194_xxx";
        Connection connection = null; 
        Class.forName("com.mysql.jdbc.Driver").newInstance(); 
        connection = DriverManager.getConnection(connectionURL, "a7291194_xxx", "xxx");
        if(!connection.isClosed())
             System.out.println("Successfully connected to " + "MySQL server using TCP/IP...");
        connection.close();
    }catch(Exception ex){
        System.out.println("Unable to connect to database"+ex);
    }   

我尝试使用以下连接器代码连接 000webhost.com 上的数据库，但它给我一个错误:

    CommunicationsException: 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.

我是第一次尝试我最好的，因为我是虚拟主机的新手所以请帮助我提前谢谢!

Answer 1

无论是在你的本地还是在服务器上都是一样的

Class.forName("com.mysql.jdbc.Driver");  
Connection connection = DriverManager.getConnection("jdbc:mysql://DomainName OR IP:3306/databasename", "username", "password");