MVC Push和MVC Pull

MVC Push:

写道

This is where the framework creates context objects what are "pushed" or made available to the templating language like JSP's allowing them either via tags or scripting to get their values and dislay them on the page. Struts1 and Expresso a good examples of this. In Expresso you create Output objects that are made just for rendering the View.

MVC Pull:

写道

This is where you have one or a few objects that are made available to all templates. The big difference is the java developer does not need to create any sort of output object, they just make backend model objects available to the View templetes. WebWork and Maverick are a good example of this, they a provide accessor methods(getters) in their Action classes that allow the View to "pull" whatever they like as long as they know of the API for that Action.

MVC Pull更适用于构建Web应用. 只因为在这种情况下Model与View之间缺少Change Notification那条"虚线".