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

第一次打开项目报白页,第二次突然就启动不了了,而且控制台报错如下: 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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