Java
TM
Portlet规范
PLT.2
PLT.2.1 What is a Portal?
A portal is a web based application that –commonly- provides
personalization, single sign on, content aggregation from dierent
sources and hosts the presentation layer of Information Systems.
Aggregation is the action of integrating content from dierent sources
within a web page. A portal may have sophisticated personalization
features to provide customized content to users. Portal pages may
have dierent set of portlets creating content for dierent users.
PLT.2.1 什么是Portal？
Portal 是一种基本的 Web 应用程序，提供了个性化设置、单一登录、可集成不
同来源的内容，充当了信息系统的表示层。所谓集成就是能把不同来源的 web 页
面组织起来。Portal 提供了精致的个性化特性来为用户定制内容。Portal 为各种用
户提供了由许多小窗口（Portlet）组成的 Portal 页面。
PLT.2.2 What is a Portlet? 10
A portlet is a Java technology based web component, managed by a portlet container, that
processes requests and generates dynamic content. Portlets are used by portals as
pluggable user interface components that provide a presentation layer to Information
Systems.
PLT.2.2 什么是小窗口 (portlet) ?
所谓 Portlet 就是基于 web 组件的 Java 技术，并由 portlet 容器来管理。Portlet 容
器负责接受请求，并动态地生成内容。Portlet 在 Portal 中，就如同信息系统表示层
的界面组件的插件。
The content generated by a portlet is also called a fragment. A fragment is a piece of
