最近做项目时，同时升级到了Jfinal3.4和MySQL8.0，其中mysql-connector-java用的是8.0.11。结果启动项目时报错如下：

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.

我根据网上说的试了下，光改serverTimezone设定没用，还需要改com.mysql.cj.jdbc.Driver，这个具体应该怎么操作？