搭建springboot，報錯：Failed to configure a DataSource: 'url' attribute is not specified and no embedd。

第一次打開項目報白頁，第二次突然就啓動不了了，而且控制檯報錯如下： Description: Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured. Reason: Failed to determine a suitable

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