http://felord.cn/_doc/_springboot/2.1.5.RELEASE/_book/
https://docs.spring.io/spring-boot/docs/current/api/
https://geekdoc.top/docs/languages/java/spring/spring-boot/2.5.5/reference/html/features.html#features.spring-application.application-exit
https://spring.io/projects/spring-boot/
