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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 1.4.2_02) on Thu Nov 13 17:20:40 PST 2003 --><TITLE>Authenticator (Java 2 Platform Ent. Ed. v1.4)</TITLE><META NAME="keywords" CONTENT="javax.mail.Authenticator class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Authenticator (Java 2 Platform Ent. 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Ed. v1.4</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../javax/mail/Address.html" title="class in javax.mail"><B>PREV CLASS</B></A> <A HREF="../../javax/mail/BodyPart.html" title="class in javax.mail"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="Authenticator.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.mail</FONT><BR>Class Authenticator</H2><PRE><A HREF="http://java.sun.com/j2se/1.4/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.mail.Authenticator</B></PRE><HR><DL><DT>public abstract class <B>Authenticator</B><DT>extends <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></DL><P>The class Authenticator represents an object that knows how to obtain authentication for a network connection. Usually, it will do this by prompting the user for information. <p> Applications use this class by creating a subclass, and registering an instance of that subclass with the session when it is created. When authentication is required, the system will invoke a method on the subclass (like getPasswordAuthentication). The subclass's method can query about the authentication being requested with a number of inherited methods (getRequestingXXX()), and form an appropriate message for the user. <p> All methods that request authentication have a default implementation that fails.<P><P><DL><DT><B>Version:</B></DT> <DD>1.6, 03/27/02</DD><DT><B>Author:</B></DT> <DD>Bill Foote, Bill Shannon</DD><DT><B>See Also:</B><DD><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/Authenticator.html" title="class or interface in java.net"><CODE>Authenticator</CODE></A>, <A HREF="../../javax/mail/Session.html#getInstance(java.util.Properties, javax.mail.Authenticator)"><CODE>Session.getInstance(java.util.Properties, javax.mail.Authenticator)</CODE></A>, <A HREF="../../javax/mail/Session.html#getDefaultInstance(java.util.Properties, javax.mail.Authenticator)"><CODE>Session.getDefaultInstance(java.util.Properties, javax.mail.Authenticator)</CODE></A>, <A HREF="../../javax/mail/Session.html#requestPasswordAuthentication(java.net.InetAddress, int, java.lang.String, java.lang.String, java.lang.String)"><CODE>Session.requestPasswordAuthentication(java.net.InetAddress, int, java.lang.String, java.lang.String, java.lang.String)</CODE></A>, <A HREF="../../javax/mail/PasswordAuthentication.html" title="class in javax.mail"><CODE>PasswordAuthentication</CODE></A></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../javax/mail/Authenticator.html#Authenticator()">Authenticator</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"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/mail/Authenticator.html#getDefaultUserName()">getDefaultUserName</A></B>()</CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected <A HREF="../../javax/mail/PasswordAuthentication.html" title="class in javax.mail">PasswordAuthentication</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/mail/Authenticator.html#getPasswordAuthentication()">getPasswordAuthentication</A></B>()</CODE><BR> Called when password authentication is needed. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected int</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/mail/Authenticator.html#getRequestingPort()">getRequestingPort</A></B>()</CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/mail/Authenticator.html#getRequestingPrompt()">getRequestingPrompt</A></B>()</CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/mail/Authenticator.html#getRequestingProtocol()">getRequestingProtocol</A></B>()</CODE><BR> Give the protocol that's requesting the connection. </TD></TR>⌨️ 快捷键说明
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