大概会出现这样的错误
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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
1、DataSourceAutoConfiguration会自动加载.可以排除此类的自动配置，在启动类中加入
@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})
参考文章:
https://blog.csdn.net/nuomizhende45/article/details/84678976