Java连接MySQL出现警告

在Java连接MySQL5.7,每连接一次数据库时就会出现警告：

 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 connection must be established by
default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore
for server certificate verification.

原因：MySQL在高版本需要指明是否进行SSL连接
解决办法是:
使用驱动mysql-connector-java-5.0.8-bin.jar版本，就会避免这种异常出现。使用mysql-connector-java-5.1.38-bin.jar版本时，会出现上述异常与警告。或者使用低版本MySQL