SpringBoot中，嵌入環境中的Tomcat忽略ServletContainerInitializer

按照@philwebb說法，嵌入式環境下，SpringBoot有意忽略javax.servlet.ServletContainerInitializer，緣由：

The search algorithm used by the containers was problematic. It also causes problems when you want to develop an executable WAR as you often want a javax.servlet.ServletContainerInitializer for the WAR that is not executed when you run java -jar.

解決方案：

1. 註冊org.springframework.boot.context.embedded.ServletContextInitializer類型的Bean代替ServletContainerInitializer。

2. 直接向容器註冊Servlet和Filter。

3. 向容器註冊ServletRegistrationBean和FilterRegistrationBean。

 

參考：

[1]https://github.com/spring-projects/spring-boot/issues/321

[2]https://github.com/spring-projects/spring-boot/issues/522