Spring Boot 应用程序启动失败：无法配置数据源

This error message indicates that the application failed to start because it could not configure a DataSource. The 'url' attribute was not specified, and the application could not find an embedded datasource to configure. The reason for this error is that the driver class could not be determined or was not available. This could be due to a missing or incorrect configuration of the database driver or a missing dependency in the application.