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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 05:46:54 PST 2008 --><TITLE>Validator (Java EE 5)</TITLE><META NAME="keywords" CONTENT="javax.faces.validator.Validator interface"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Validator (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/validator/MethodExpressionValidator.html" title="class in javax.faces.validator"><B>PREV CLASS</B></A> <A HREF="../../../javax/faces/validator/ValidatorException.html" title="class in javax.faces.validator"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?javax/faces/validator/Validator.html" target="_top"><B>FRAMES</B></A> <A HREF="Validator.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 | <A HREF="#field_summary">FIELD</A> | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | 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.faces.validator</FONT><BR>Interface Validator</H2><DL><DT><B>All Superinterfaces:</B> <DD><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/util/EventListener.html" title="class or interface in java.util">EventListener</A></DD></DL><DL><DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../javax/faces/validator/DoubleRangeValidator.html" title="class in javax.faces.validator">DoubleRangeValidator</A>, <A HREF="../../../javax/faces/validator/LengthValidator.html" title="class in javax.faces.validator">LengthValidator</A>, <A HREF="../../../javax/faces/validator/LongRangeValidator.html" title="class in javax.faces.validator">LongRangeValidator</A>, <A HREF="../../../javax/faces/validator/MethodExpressionValidator.html" title="class in javax.faces.validator">MethodExpressionValidator</A></DD></DL><HR><DL><DT><PRE>public interface <B>Validator</B><DT>extends <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/util/EventListener.html" title="class or interface in java.util">EventListener</A></DL></PRE><P><p>A <strong>Validator</strong> implementation is a class that can perform validation (correctness checks) on a <A HREF="../../../javax/faces/component/EditableValueHolder.html" title="interface in javax.faces.component"><CODE>EditableValueHolder</CODE></A>. Zero or more <code>Validator</code>s can be associated with each <A HREF="../../../javax/faces/component/EditableValueHolder.html" title="interface in javax.faces.component"><CODE>EditableValueHolder</CODE></A> in the view, and are called during the <em>Process Validations</em> phase of the request processing lifecycle.</p> <p>Individual <A HREF="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><CODE>Validator</CODE></A>s should examine the value and component that they are passed, and throw a <A HREF="../../../javax/faces/validator/ValidatorException.html" title="class in javax.faces.validator"><CODE>ValidatorException</CODE></A> containing a <A HREF="../../../javax/faces/application/FacesMessage.html" title="class in javax.faces.application"><CODE>FacesMessage</CODE></A>, documenting any failures to conform to the required rules. <p>For maximum generality, <A HREF="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><CODE>Validator</CODE></A> instances may be configurable based on properties of the <A HREF="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><CODE>Validator</CODE></A> implementation class. For example, a range check <A HREF="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><CODE>Validator</CODE></A> might support configuration of the minimum and maximum values to be used.</p> <p><A HREF="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><CODE>Validator</CODE></A> implementations must have a zero-arguments public constructor. In addition, if the <A HREF="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><CODE>Validator</CODE></A> class wishes to have configuration property values saved and restored with the view, the implementation must also implement <A HREF="../../../javax/faces/component/StateHolder.html" title="interface in javax.faces.component"><CODE>StateHolder</CODE></A>.</p><P><P><HR><P><!-- =========== FIELD SUMMARY =========== --><A NAME="field_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>Field Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static <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/validator/Validator.html#NOT_IN_RANGE_MESSAGE_ID">NOT_IN_RANGE_MESSAGE_ID</A></B></CODE><BR> <B>Deprecated.</B> <I>Use <A HREF="../../../javax/faces/validator/DoubleRangeValidator.html#NOT_IN_RANGE_MESSAGE_ID"><CODE>DoubleRangeValidator.NOT_IN_RANGE_MESSAGE_ID</CODE></A> or <A HREF="../../../javax/faces/validator/LongRangeValidator.html#NOT_IN_RANGE_MESSAGE_ID"><CODE>LongRangeValidator.NOT_IN_RANGE_MESSAGE_ID</CODE></A> instead.</I></TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== -->⌨️ 快捷键说明
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