MySql的Communications link failure解決辦法

在使用JDBC鏈接mysql時可能會遇到如下錯誤：

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

解決方法：

將

String url = "jdbc:mysql://192.168.xxx.xxx:3306/db";

此處的IP部分添加到hosts文件中，並使用hosts中設置的名稱進行鏈接。

例：

String url = "jdbc:mysql://127.0.0.1:3306/db";

變爲

String url = "jdbc:mysql://localhost:3306/db";

 

 

練習一下英語：

This error may encountered when using JDBC to connect Mysql:

　　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

sulotions:

You need add target IP to your hosts file and name it.

make String url = "jdbc:mysql://192.168.xxx.xxx:3306/db";  be String url = "jdbc:mysql://hostname:3306/db";

example：

String url = "jdbc:mysql://127.0.0.1:3306/db";

change to

String url = "jdbc:mysql://localhost:3306/db";