spring容器

private final ServletContainer servletContainer;
private final ConcurrentMap<String, Object> attributes;

org.springframework.web.context.WebApplicationContext=org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext


org.springframework.web.servlet.FrameworkServlet.CONTEXT.dispatcherServlet=org.springframework.web.context.support.XmlWebApplicationContext










Servletcontext,ApplicationContext和DispatcherServlet
https://www.itread01.com/content/1541881392.html







https://github.com/undertow-io/undertow/blob/master/servlet/src/main/java/io/undertow/servlet/spec/ServletContextImpl.java





73，SpringMVC+Spring的父子容器关系
https://zhuanlan.zhihu.com/p/59998323








Spring Web Contexts
https://www.baeldung.com/spring-web-contexts