com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failureThe last packet s

记录一下今天使用java连接部署在docker容器里的mysql遇到的问题，刚开始以为的跟正常的连接一样，结果报错

com.mysql.cj.jdbc.exceptions.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.

弄了有一会，发现还是没用，最后在一篇博客发现原来是配置上要加上

?useSSL=false

需要添加参数useSSL=false，或者配置ssl

即

spring.datasource.url=jdbc:mysql://192.168.6.128:3306/user?useSSL=false

就OK了