错误描述：
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
检查url配置发现数据源配置没有问题。继续看报错信息。
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).
发现报当前没有激活的配置文件。
检查项目发现application.properties文件没有被激活。
重新构建项目
重启成功。