报错信息： 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-09-17 13:29:41.132 ERROR 8108 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class


Action:

Consider the following:
	If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
	If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).


Process finished with exit code 1

解决：我在导入依赖的时候添加了mysql和mybatis的依赖  但是在application.yml没有配置，所有只需要将数据库相关配置加上或者注释掉相关依赖即可。