Java使用mysql-jdbc連線MySQL出現如下警告：

Establishing SSL connection without server's identityverification 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 optionisn't set. For compliance with existing applications not using SSL theverifyServerCertificate property is set to 'false'. You need either toexplicitly disable SSL by setting useSSL=false, or set useSSL=true and providetruststore for server certificate verification.

原因是MySQL在高版本需要指明是否進行SSL連線。解決方案如下：

在mysql連線字串url中加入ssl=true或者false即可，如下所示。

url=jdbc:mysql://127.0.0.1:3306/framework?characterEncoding=utf8&useSSL=true

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