错误如下
The last packet sent successfully to the server was 0 milliseconds ago. The driv
er has not received any packets from the server.com.mysql.jdbc.exceptions.jdbc4.
CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driv
er has not received any packets from the server.com.mysql.jdbc.exceptions.jdbc4.
CommunicationsException: Communications link failure
e
