连接数据库时出现警告：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 mus

警告内容：

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.

翻译后：

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，如果未设置显式选项，则默认情况下必须建立SSL连接。 为了与不使用SSL的现有应用程序兼容，将verifyServerCertificate属性设置为'false'。 您需要通过设置useSSL = false显式禁用SSL，或者设置useSSL = true并提供信任库以进行服务器证书验证。

解决方法：在url的最后添加“?useSSL=false”