问一个Spring的问题：在Spring项目中是有两个容器的，一个是对整个Spring有效的，一个是仅仅是SpringMVC上下文的，我测试（==）后的确是false，但是获取的Bean确实true，这是怎么回事？？？
WebApplicationContext applicationContext1 = (WebApplicationContext)request.getAttribute(WEB_APPLICATION_CONTEXT_ATTRIBUTE);
UserServer userServer1 = applicationContext1.getBean("userServer",UserServer.class);
System.out.println(userServer1 == userServer);
WebApplicationContext applicationContext2 = WebApplicationContextUtils.getRequiredWebApplicationContext(request.getSession().getServletContext());
UserServer userServer2 = applicationContext2.getBean("userServer",UserServer.class);
System.out.println(userServer1 == userServer2);
WebApplicationContext applicationContext3 = (WebApplicationContext)request.getSession().getServletContext().getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
System.out.println(applicationContext1 == applicationContext2);
System.out.println(applicationContext1 == applicationContext3);
System.out.println(applicationContext2 == applicationContext3);