报错信息如下：
org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 634 milliseconds ago. The last packet sent successfully to the server was 620 milliseconds ago.
### The error may exist in UserMapper.xml
### The error may involve UserMapper.GetUser
### The error occurred while executing a query
### Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 634 milliseconds ago. The last packet sent successf
解决方法： 将url中的UseSSL中的true改为false