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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_14) on Mon Jan 28 05:46:52 PST 2008 --><TITLE>FacesContext (Java EE 5)</TITLE><META NAME="keywords" CONTENT="javax.faces.context.FacesContext class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="FacesContext (Java EE 5)";}</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="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-all.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/faces/context/ExternalContext.html" title="class in javax.faces.context"><B>PREV CLASS</B></A> <A HREF="../../../javax/faces/context/FacesContextFactory.html" title="class in javax.faces.context"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?javax/faces/context/FacesContext.html" target="_top"><B>FRAMES</B></A> <A HREF="FacesContext.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 | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <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.faces.context</FONT><BR>Class FacesContext</H2><PRE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A> <IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>javax.faces.context.FacesContext</B></PRE><HR><DL><DT><PRE>public abstract class <B>FacesContext</B><DT>extends <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></DL></PRE><P><p><strong>FacesContext</strong> contains all of the per-request state information related to the processing of a single JavaServer Faces request, and the rendering of the corresponding response. It is passed to, and potentially modified by, each phase of the request processing lifecycle.</p> <p>A <A HREF="../../../javax/faces/context/FacesContext.html" title="class in javax.faces.context"><CODE>FacesContext</CODE></A> instance is associated with a particular request at the beginning of request processing, by a call to the <code>getFacesContext()</code> method of the <A HREF="../../../javax/faces/context/FacesContextFactory.html" title="class in javax.faces.context"><CODE>FacesContextFactory</CODE></A> instance associated with the current web application. The instance remains active until its <code>release()</code> method is called, after which no further references to this instance are allowed. While a <A HREF="../../../javax/faces/context/FacesContext.html" title="class in javax.faces.context"><CODE>FacesContext</CODE></A> instance is active, it must not be referenced from any thread other than the one upon which the servlet container executing this web application utilizes for the processing of this request. </p><P><P><HR><P><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_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>Constructor Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../javax/faces/context/FacesContext.html#FacesContext()">FacesContext</A></B>()</CODE><BR> </TD></TR></TABLE> <!-- ========== 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>abstract void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/faces/context/FacesContext.html#addMessage(java.lang.String, javax.faces.application.FacesMessage)">addMessage</A></B>(<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> clientId, <A HREF="../../../javax/faces/application/FacesMessage.html" title="class in javax.faces.application">FacesMessage</A> message)</CODE><BR> Append a <A HREF="../../../javax/faces/application/FacesMessage.html" title="class in javax.faces.application"><CODE>FacesMessage</CODE></A> to the set of messages associated with the specified client identifier, if <code>clientId</code> is not <code>null</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>abstract <A HREF="../../../javax/faces/application/Application.html" title="class in javax.faces.application">Application</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/faces/context/FacesContext.html#getApplication()">getApplication</A></B>()</CODE><BR> Return the <A HREF="../../../javax/faces/application/Application.html" title="class in javax.faces.application"><CODE>Application</CODE></A> instance associated with this web application.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>abstract <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/util/Iterator.html" title="class or interface in java.util">Iterator</A><<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/faces/context/FacesContext.html#getClientIdsWithMessages()">getClientIdsWithMessages</A></B>()</CODE><BR> Return an <code>Iterator</code> over the client identifiers for which at least one <A HREF="../../../javax/faces/application/FacesMessage.html" title="class in javax.faces.application"><CODE>FacesMessage</CODE></A> has been queued.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <A HREF="../../../javax/faces/context/FacesContext.html" title="class in javax.faces.context">FacesContext</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/faces/context/FacesContext.html#getCurrentInstance()">getCurrentInstance</A></B>()</CODE><BR> Return the <A HREF="../../../javax/faces/context/FacesContext.html" title="class in javax.faces.context"><CODE>FacesContext</CODE></A> instance for the request that is being processed by the current thread, if any.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../javax/el/ELContext.html" title="class in javax.el">ELContext</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/faces/context/FacesContext.html#getELContext()">getELContext</A></B>()</CODE><BR> Return the <code>ELContext</code> instance for this <code>FacesContext</code> instance.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>abstract <A HREF="../../../javax/faces/context/ExternalContext.html" title="class in javax.faces.context">ExternalContext</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/faces/context/FacesContext.html#getExternalContext()">getExternalContext</A></B>()</CODE><BR> Return the <A HREF="../../../javax/faces/context/ExternalContext.html" title="class in javax.faces.context"><CODE>ExternalContext</CODE></A> instance for this <code>FacesContext</code> instance.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>abstract <A HREF="../../../javax/faces/application/FacesMessage.Severity.html" title="class in javax.faces.application">FacesMessage.Severity</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/faces/context/FacesContext.html#getMaximumSeverity()">getMaximumSeverity</A></B>()</CODE><BR> Return the maximum severity level recorded on any <A HREF="../../../javax/faces/application/FacesMessage.html" title="class in javax.faces.application"><CODE>FacesMessage</CODE></A>s that has been queued, whether or not they are associated with any specific <A HREF="../../../javax/faces/component/UIComponent.html" title="class in javax.faces.component"><CODE>UIComponent</CODE></A>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>abstract <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/util/Iterator.html" title="class or interface in java.util">Iterator</A><<A HREF="../../../javax/faces/application/FacesMessage.html" title="class in javax.faces.application">FacesMessage</A>></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/faces/context/FacesContext.html#getMessages()">getMessages</A></B>()</CODE><BR> Return an <code>Iterator</code> over the <A HREF="../../../javax/faces/application/FacesMessage.html" title="class in javax.faces.application"><CODE>FacesMessage</CODE></A>s that have been queued, whether or not they are associated with any specific client identifier.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>abstract <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/util/Iterator.html" title="class or interface in java.util">Iterator</A><<A HREF="../../../javax/faces/application/FacesMessage.html" title="class in javax.faces.application">FacesMessage</A>></CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/faces/context/FacesContext.html#getMessages(java.lang.String)">getMessages</A></B>(<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> clientId)</CODE>⌨️ 快捷键说明
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