Java连接Mysql数据库的过程中出现了如下的警告信息:

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.

警告提示:不建议使用没有带服务器身份验证的SSL连接

解决方案：

1.如果做的是单一测试：在数据库连接的url中添加useSSL=false;

jdbc:mysql://localhost:3306/demo_stu?useSSL=false

2.url中添加useSSL=true，并且提供服务器的验证证书。

Properties properties = new Properties();
properties.setProperty("user", "root");
properties.setProperty("password", "1234");
properties.setProperty("useSSL", "false");
properties.setProperty("autoReconnect", "true");
try (Connection conn = DriverManager.getConnection(connectionUrl, properties)) {...
} catch (SQLException e) {...
}