JAVA Spring-mvc 遇到的一个关于数据库的Error/Exception：
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：
com.mysql.jdbc.Driver驱动是mysql-connector-java 5中的
com.mysql.cj.jdbc.Driver驱动是mysql-connector-java 6以上版本的
出现上述错误时，可以将.properties文件设置：driverClassName = com.mysql.cj.jdbc.Driver
