tomcat7 - Changing default welcome-page for spring-boot application deployed as a war - Stack Overflow
https://stackoverflow.com/questions/26057995/changing-default-welcome-page-for-spring-boot-application-deployed-as-a-war
Spring boot index page example - Java Developer Zone
https://javadeveloperzone.com/spring-boot/spring-boot-index-page-example/
springboot默認的歡迎頁面設置_東家庄的博客-CSDN博客
https://blog.csdn.net/qq_29477175/article/details/82117177
Spring MVC或Spring Boot配置默認訪問頁面不生效？ - 格姍知識圈 - 博客園
https://www.cnblogs.com/geshanzsq/p/11089169.html