初学者启动springboot报错

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-03-25 16:27:02.807 ERROR 16256 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:
Failed to auto-configure a DataSource: 'spring.datasource.url' is not specified and no embedded datasource could be auto-configured.
Reason: Failed to determine a suitable driver class

Action:

Consider the following situation:
If you want an embedded database like H2, HSQL or Derby, please add it in the Classpath.
If you have database settings to be loaded from a particular profile you may need to activate it since no profiles were currently active.

报错显示无法找到数据源！Failed to auto-configure a DataSource: ‘spring.datasource.url’ is not specified and no embedded
原因是：pom配置文件中mysql未成功配置

第一种解决方式：在启动类springbootapplication后加上（exclude={DataSourceAutoConfiguration.class}）,表示暂时不需要数据库组件
第二种解决方式：pom配置文件中mysql依赖重新添加成功。
按照以上方式便可成功启动。