使用JDBC连接数据库时出现报错，
报错内容：
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.
解决办法：
将com.mysql.jdbc.Driver 改为 com.mysql.cj.jdbc.Driver即可。
<property name="driver" value="com.mysql.cj.jdbc.Driver" />