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

... ...
Error starting ApplicationContext. To display the conditions report re-run your application with ‘debug‘ enabled.
2020-04-02 12:52:47.306 ERROR 22036 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

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).


进程已结束,退出代码1

@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})