数据源配置问题Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'.

问题：

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.

原因：

mysql驱动更新，即8.x支持com.mysql.cj.jdbc.Driver，5.x支持com.mysql.jdbc.Driver

解决方法:

1、更新驱动。在application.properties中将jdbc.driver更新为"com.mysql.cj.jdbc.Driver"

2、如果是团队协作，那就需要保持mysql版本了。查看POM文件中mysql的依赖，添加<version>5.x的版本号<version/>，更新POM。