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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.5.0) on Wed Feb 06 17:53:06 CET 2008 --><TITLE>Portlet</TITLE><META NAME="keywords" CONTENT="javax.portlet.Portlet interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Portlet";}</SCRIPT><NOSCRIPT></NOSCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/Portlet.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../javax/portlet/PortalContext.html" title="interface in javax.portlet"><B>PREV CLASS</B></A> <A HREF="../../javax/portlet/PortletConfig.html" title="interface in javax.portlet"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html?javax/portlet/Portlet.html" target="_top"><B>FRAMES</B></A> <A HREF="Portlet.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">javax.portlet</FONT><BR>Interface Portlet</H2><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../javax/portlet/GenericPortlet.html" title="class in javax.portlet">GenericPortlet</A></DD></DL><HR><DL><DT><PRE>public interface <B>Portlet</B></DL></PRE><P>The <CODE>Portlet</CODE> interface is used by the portlet container to invoke the portlets. Every portlet has to implement this interface, either by directly implementing it, or by using an existing class implementing the Portlet interface. <P> A portlet is a Java technology-based web component. It is managed by the portlet container and processes requests and generates dynamic content as response. Portlets are used by portals as pluggable user interface components. <p> The content generated by a portlet is 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 into a complete document. The content of a portlet is normally aggregated with the content of other portlets into the portal page. <P> The portlet container instantiates portlets, manages their lifecycle and invoking them to process requests. The lifecycle consists of: <ul> <li>initializing the portlet using using the <code>init</code> method <li>request processsing <li>taking the portlet out of service using the <code>destroy</code> method </ul> <p> Request processing is divided into two types: <ul> <li>action requests handled through the <code>processAction</code> method, to perform actions targeted to the portlet <li>render requests handled through the <code>render</code> method, to perform the render operation </ul><P><P><HR><P><!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/portlet/Portlet.html#destroy()">destroy</A></B>()</CODE><BR> Called by the portlet container to indicate to a portlet that the portlet is being taken out of service.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/portlet/Portlet.html#init(javax.portlet.PortletConfig)">init</A></B>(<A HREF="../../javax/portlet/PortletConfig.html" title="interface in javax.portlet">PortletConfig</A> config)</CODE><BR> Called by the portlet container to indicate to a portlet that the portlet is being placed into service.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/portlet/Portlet.html#processAction(javax.portlet.ActionRequest, javax.portlet.ActionResponse)">processAction</A></B>(<A HREF="../../javax/portlet/ActionRequest.html" title="interface in javax.portlet">ActionRequest</A> request, <A HREF="../../javax/portlet/ActionResponse.html" title="interface in javax.portlet">ActionResponse</A> response)</CODE><BR> Called by the portlet container to allow the portlet to process an action request.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/portlet/Portlet.html#render(javax.portlet.RenderRequest, javax.portlet.RenderResponse)">render</A></B>(<A HREF="../../javax/portlet/RenderRequest.html" title="interface in javax.portlet">RenderRequest</A> request, <A HREF="../../javax/portlet/RenderResponse.html" title="interface in javax.portlet">RenderResponse</A> response)</CODE><BR> Called by the portlet container to allow the portlet to generate the content of the response based on its current state.</TD></TR></TABLE> <P><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"><B>Method Detail</B></FONT></TH>⌨️ 快捷键说明
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