Error starting ApplicationContext. To display the conditions report re-run your application with ‘debug’ enabled.
2021-10-16 18:59:03.083 ERROR 55024 — [ main] o.s.b.d.LoggingFailureAnalysisReporter :
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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).

After the successful automatic code generation with mybatis-plus-generator, the above error was reported when starting the project from the main portal, and was successfully solved by configuring the application.yml file database source