Springboot project startup error Failed to configure a DataSource: 'url' attribute is not specified and no embedded d

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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

Solution: Add the following configuration information after the url project:

useUnicode=true&characterEncoding=utf-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=GMT%2B8

url: jdbc:mysql://127.0.0.1:3306/springbootr0361?useUnicode=true&characterEncoding=utf-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=GMT%2B8

If it still doesn't work, sometimes the idea compiler does not compile the project, and it needs to be manually built or maven-package is basically OK.