我是远程连接的 ，报下面这个错
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.
能看到异常信息，网上先搜下吧， https://www.cnblogs.com/chrischennx/p/7279215.html