url增加参数useSSL 和时区 : jdbc:mysql://localhost:3306/mydb?useSSL=false&serverTimezone=UTC
driver变化: com.mysql.jdbc.Driver => com.mysql.cj.jdbc.Driver

常见错误提示1：
如果driver没有添加cj，则会在连接的时候出现以下错误提示：
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and
manual loading of the driver class is generally unnecessary.
　　
常见错误提示2：
url中如果没有设置useSSL=false，则会在连接的时候出现以下错误提示：
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 <br>SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate<br> 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<br> verification.


常见错误提示3：
url中如果没有设置serverTimezone=UTC，则会在连接的时候出现以下错误提示：
The server time zone value '???ú±ê×??±??' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 
serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.

参考链接：https://tieba.baidu.com/p/5793343764?red_tag=1683873459