项目启动时报Warn: Establishing SSL connection without server's identity verification is not recommended

在项目启动时，报Warn：

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明细是：
WARN: 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.

报这个警告的原因是：Mysql在高版本需要指明是否进行SSL;

• 解决办法：
  在jdbcurl中增加：useSSL=false

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