servlet web项目连接数据库报错

报错信息类似这样：

Wed May 27 14:15:54 CST 2020 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 se.........

解决方法：

在url值中加上useSSL=false。

url值应该改为：jdbc:mysql://localhost:3306/supermarket?useSSL=false&serverTimezone=UTC