SpringBoot migrate from 1.5.x to 2.0 | 全新的配置文件加载机制（不向下兼容）

迁移到 SpringBoot 2.0 服务器属性自动配置无法打开，因为它不存在 ·问题 #12985 ·spring-projects/spring-boot
https://github.com/spring-projects/spring-boot/issues/12985

Spring Boot 2.4.0正式发布，全新的配置文件加载机制（不向下兼容） - YourBatman - 博客园
https://www.cnblogs.com/yourbatman/p/14061177.html

ServerPropertiesAutoConfiguration (Spring Boot Docs 1.5.4.RELEASE API)
https://docs.spring.io/spring-boot/docs/1.5.4.RELEASE/api/org/springframework/boot/autoconfigure/web/ServerPropertiesAutoConfiguration.html

ServerPropertiesAutoConfiguration (Spring Boot Docs 1.5.22.RELEASE API)
https://docs.spring.io/spring-boot/docs/1.5.22.RELEASE/api/org/springframework/boot/autoconfigure/web/ServerPropertiesAutoConfiguration.html