本文针对MySQL连接时出现的WARN级别日志警告，提供了详细的解释及解决方案。建议在URL中加入useSSL=false参数来禁用SSL连接，以避免因未验证服务器身份而导致的安全风险。
控制台WARN日志：
Wed Oct 28 15:50:40 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 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.
解决方法：
在url地址加上参数：
localhost:3306/demo?useSSL=false
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