Console报错如下：

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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:
	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

解决方法：

  需要在启动类的@EnableAutoConfiguration或@SpringBootApplication中添加exclude= {DataSourceAutoConfiguration.class}，即 @SpringBootApplication(exclude = {DataSourceAutoConfiguration.class}) 排除此类的autoconfig。启动以后就可以正常运行。

这是因为添加了数据库组件，所以autoconfig会去读取数据源配置，而新建的项目还没有配置数据源，所以会导致异常出现。