不能自動裝配從根上下文子bean（在Web上下文定義）

Question

我在這autowires另一個bean在WebContext根上下文（ApplicationContext的）一個bean和它拋出：

Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pageFlowController': Injection of autowired dependencies failed; nested exception is 
org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.flex.messaging.MessageTemplate 
com.biosds.gcfs.nassic.flow.PageFlowController.msgTemplate; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type 
[org.springframework.flex.messaging.MessageTemplate] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: 
{@org.springframework.beans.factory.annotation.Autowired(required=true)} 

我想在PageFlowController中獲取MessageTemplate，其中PageFlowController在根上下文中定義，在Web上下文中定義MessageTemplate。

Answer 1

子上下文有權訪問父上下文中的bean，但父上下文無法訪問子上下文中的bean。

查看Spring Reference瞭解更多信息。