springboot1.5.9升级到springboot2.0.5遇到的问题

问题描述：

Failed to bind properties under 'spring.datasource.druid.driver' to java.sql.Driver:
    Property: spring.datasource.druid.driver
    Value: com.mysql.jdbc.Driver
    Origin: class path resource [application.yml]:5:20
    Reason: No converter found capable of converting from type [java.lang.String] to type [java.sql.Driver]

解决方法 

修改application.yml文件将老版本的
spring:
  datasource:
  driver: com.mysql.jdbc.Driver
修改为
spring:
  datasource:
    druid:
      driver-class-name: com.mysql.jdbc.Driver