Failed to determine a suitable driver class

springboot startup error

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APPLICATION FAILED TO START
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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

Error explanation

配置数据源失败：未指定“url”属性，无法配置嵌入的数据源。
原因：未能确定合适的驱动程序类

Error troubleshooting analysis

View startup log

 [ main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
 [ main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
 [ main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.32

Doubt: port 8080, 8181 configured in application.yml

server:
  port: 8181

Judgment: application.yml is not effective

Found the reason: the resources folder format is incorrect

Solution: Set the folder format Resources Root

Postscript: After searching for information on the Internet for a long time, I found that the problem could not be solved. Finally, it turned out that it was a problem with the format of the folder. I hope it can help you. This article is original. I hope everyone will like your support. Thank you.