MySQL 8小时断开连接

今天在工作过程中，遇到MySQL的程序，在跑一段时间后，就自动断开连接。出现的代码提示如下：

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 
The last packet successfully received from the server was56588 milliseconds ago.
The last packet sent successfully to the server was 56588 milliseconds ago, which is longer than the server configured value of 'wait_timeout'. 
You should consider either expiring and/or testing connection validity before use in your application, 
increasing the server configured values for client timeouts,
or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.

大概意思是让：设置 autoReconnect=true。但是我在网上查询到：如果是mysql4以下，则只需要在datasource的url后加上autoReconnect=true便可以解决。但是我的版本是5，所以无法使用该方法。