Establishing SSL connection without server's identity verification is not recommended.

完全描述:Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing app

没啥问题,有道翻译过来就是:

　　不建议在没有服务器身份验证的情况下建立SSL连接。根据MySQL 5.5.45+、5.6.26+和5.7.6+的要求，如果不设置显式选项，则必须默认设置SSL连接。

然后再数据库配置

　　url=.....加上

&useSSL=false
就行了