MySQLNonTransientConnectionException：無法創建與數據庫服務器的連接。嘗試重新連接3次。放棄

我無法連接到我的數據庫。我認爲這是一個我不瞭解的需要改變的地方。我在這裏有一些非常基本的代碼：MySQLNonTransientConnectionException：無法創建與數據庫服務器的連接。嘗試重新連接3次。放棄

public static void main(String[] args) 
{ 
    try 
    { 
     Connection con = DriverManager.getConnection("jdbc:mysql://IP:3306/TABLENAME?autoReconnect=true","USERNAME", "PASSWORD"); 
     con.close(); 
    } 

    catch(Exception e) 
    { 
     e.printStackTrace(); 
    } 
}

顯然與登錄信息。它會導致這個錯誤：

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up. 

Caused by: com.mysql.jdbc.exceptions.jdbc4.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. 

Caused by: java.net.ConnectException: Connection refused

我已經通過大約10個不同的崗位看上去差不多的問題，並試圖解決他們仍然無法得到它的工作。

來源

2016-04-24 Diet Cookiez

http://stackoverflow.com/questions/2983248/com-mysql-jdbc-exceptions-jdbc4-communicationsexception-communications-link-fai –

@FastSnail我嘗試了所有的BalusC技巧，但仍然遇到同樣的問題。 –

也閱讀這篇文章http://stackoverflow.com/questions/6865538/solving-a-communications-link-failure-with-jdbc-and-mysql –