异常：

Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. 

整合spring boot项目过程中出现的，用了最新的mysql 连接驱动

application-dev.properties

spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=GMT%2B8spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

需要将 com.mysql.jdbc.Driver  改为  com.mysql.cj.jdbc.Driver

spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=GMT%2B8spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver