[Java] 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.

위와 같은 에러가 나면서 시작되지 않을때는 

 

Class.forName("com.mysql.jdbc.Driver"); 

구문을

Class.forName("Com.mysql.cj.jdbc.Driver");

로 변경해주면 된다.