com.mysql.jdbc.Driver是MySQL 5版本的。MySQL 5以上需要使用 com.mysql.cj.jdbc.Driver。
否则会报错：
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.
com.mysql.jdbc.Driver 和 com.mysql.cj.jdbc.Driver的区别
原文：https://www.cnblogs.com/yunn/p/12991448.html