Since the portlet is being designed using a Model 2 JSP Architecture, the bean plays an important role in our design.

由于portlet是用Model 2 JSp体系架构设计的，所以该bean在我们的设计中起着很重要的作用。

youdao

JSF also improves somewhat on the traditional Model 2 architecture by making it easier to move presentation and business logic out of your controller and move business logic out of your JSP pages.

通过使得更加容易将表示和业务逻辑移出控制器，以及将业务逻辑移出jsp页面，JSF也在传统的Model 2架构上有了一些改进。

youdao

In the J2EE Model 2 architecture, a servlet is the UI controller, responsible for getting input data, calling some back-end business logic, and then deciding what JSP to forward to.

在J2EE Model 2体系结构中，Servlet是UI控制器，负责获取输入数据，调用某些后端的业务逻辑，然后决定转发到哪一个JSP。

youdao