轉載自：https://blog.csdn.net/justlpf/article/details/80734356
原文地址: https://blog.csdn.net/liuguangsh/article/details/72518244
web應用中連接mysql數據庫時后台會出現這樣的提示：
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.
ssl是什么：https://www.so.com/s?ie=utf-8&src=se7_toolbar&q=SSL
原因是MySQL在高版本需要指明是否進行SSL連接。解決方案如下：
在mysql連接字符串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