本文探讨了JSF中Managed Bean的概念，即Bean如何被创建及初始化，并解析了Backing Bean的角色，通常作为页面组件的服务器端表示。文章还讨论了Bean的作用域及时机问题。
(Quoted from [url=http://saloon.javaranch.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic&f=82&t=000951]here[/url])
Managed bean is about how the bean is created and initialized. As you know, jsf uses the lazy initialization model. It means that the bean in the particular scope is created and initialized not at the moment when the scope is started, but on-demand, i.e. when the bean is first time required.
Backing bean is about the role a particular managed bean plays. This is a role to be a server-side representation of the components located on the page. Usually, the backing beans have a request scope, but it is not a restriction.
If you use or try to work with Java Studio Creator, you can find the backing bean work more explicitly. The same for Shale, because it is designed by the same architect. Generally, it is not required by specification to bind all the components with the properties of the backing bean, so, on practice, the differentiation between the backing bean and managed bean is not evident. Sometimes people call all the beans like backing beans even they are just used for value binding. There is no a thumb rule here, just because the JSF specification has no explicit definition for those terms.[flash=200,200][/flash]
Managed bean is about how the bean is created and initialized. As you know, jsf uses the lazy initialization model. It means that the bean in the particular scope is created and initialized not at the moment when the scope is started, but on-demand, i.e. when the bean is first time required.
Backing bean is about the role a particular managed bean plays. This is a role to be a server-side representation of the components located on the page. Usually, the backing beans have a request scope, but it is not a restriction.
If you use or try to work with Java Studio Creator, you can find the backing bean work more explicitly. The same for Shale, because it is designed by the same architect. Generally, it is not required by specification to bind all the components with the properties of the backing bean, so, on practice, the differentiation between the backing bean and managed bean is not evident. Sometimes people call all the beans like backing beans even they are just used for value binding. There is no a thumb rule here, just because the JSF specification has no explicit definition for those terms.[flash=200,200][/flash]
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