博客讲述了作者在配置Spring Boot应用时，因误将application.yml文件名写错为applcaition.yml导致Spring Boot无法读取配置，从而引发数据库连接失败的问题。通过错误提示，作者意识到可能是配置文件未被激活，检查后发现确实是文件名拼写错误。博客强调了在开发中遵循‘约定优于配置’的原则的重要性。
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
长话短说，我把application.yml写错了，写成applcaition.yml，这样即使我把这个文件设置成为springboot的配置文件，springboot也无法读取。。
怎么找到的呢？
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).
这里面后一句—— If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).——提醒了我，说是可能配置文件没激活，好家伙我一检查，果真如此。。我以为我把这个文件设置成配置文件就万事大吉了，没注意检查拼写，所以说
约定大于配置！
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