老文原創
2. 總覽
2.1. 什麼是Portal（門戶）？
Portal 是一種網頁應用信息系統，通常提供個性化、單點登錄、由多種不同來源的內容聚合，並hosts 展示層。
“聚合“就是把不同來源的內容整合到一個網頁。
Portal 可能有豐富的個性化功能提供給使用者可以定製的內容。Portal 頁面可以是由一系列不同的portlets 給不同的使用者提供內容。
2.2. 什麼是Portlet？
Portlet 是一種Java 技術的網頁構件，她由portlet 容器管理，能夠處理請求構造動態內容。
Portal 用portlet 這種可插入的用戶接口構件來提供信息系統的表現層。
由Portlet 生成的內容也稱爲“一片“。
一片就是一塊標記語言（如：HTML、XHTML、WML），這樣一片和其他的片按照一定的規則聚合一起構成一個完整的文檔。
一個portlet的內容和其他portlet 的內容組合成portal 頁面的一個表單。 Portlet 的生命週期由portlet 容器來管理。
網頁客戶端由portal 實現的請求/響應 模式來與portlets 交互。
通常，用戶與portlet 生成的內容交互，比如，進入鏈接或提交表單，portal 會收到發生在portlet 中的動作，再轉到用戶交互的portlets 目標。
依據使用者對portlet 的配置，對用戶生成的內容會有不同。
老文原創
PLT.2.1 What is a Portal?
A portal is a web based application that –commonly- provides personalization, single
sign on, content aggregation from different sources and hosts the presentation layer 5 r of
Information Systems. Aggregation is the action of integrating content from different
sources within a web page. A portal may have sophisticated personalization features to
provide customized content to users. Portal pages may have different set of portlets
creating content for different users.
10 PLT.2.2 What is a Portlet?
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.
15 The content generated by a portlet is also called a fragment. A fragment is a piece of
markup (e.g. HTML, XHTML, WML) adhering to certain rules and can be aggregated
with other fragments to form a complete document. The content of a portlet is normally
aggregated with the content of other portlets to form the portal page. The lifecycle of a
portlet is managed by the portlet container.
20 Web clients interact with portlets via a request/response paradigm implemented by the
portal. Normally, users interact with content produced by portlets, for example by
following links or submitting forms, resulting in portlet actions being received by the
portal, which are forwarded by it to the portlets targeted by the user's interactions.
The content generated by a portlet