报错：Loading class `com.mysql.jdbc.Driver'. This is deprecated.

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.

问题原因：
  这是最新版MySQL的jdbc驱动包名（路径）引发的问题。
解决方法：
  将代码里的
jdbc.driver=com.mysql.jdbc.Driver
改为
jdbc.driver=com.mysql.cj.jdbc.Driver