com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

如果项目中报一下红色警告
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 conne

解决方法：
在mysql连接字符串的url中添加配置 ?useSSL=false