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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Thu Apr 27 23:35:32 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Class HttpURLConnection</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <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/HttpURLConnection.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><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. Ed. v1.3</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../java/net/DatagramSocketImpl.html"><B>PREV CLASS</B></A> <A HREF="../../java/net/InetAddress.html"><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="HttpURLConnection.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">java.net</FONT><BR>Class HttpURLConnection</H2><PRE><A HREF="../../java/lang/Object.html">java.lang.Object</A> | +--<A HREF="../../java/net/URLConnection.html">java.net.URLConnection</A> | +--<B>java.net.HttpURLConnection</B></PRE><HR><DL><DT>public abstract class <B>HttpURLConnection</B><DT>extends <A HREF="../../java/net/URLConnection.html">URLConnection</A></DL><P>A URLConnection with support for HTTP-specific features. See <A HREF="http://www.w3.org/pub/WWW/Protocols/"> the spec </A> for details. <p> Each HttpURLConnection instance is used to make a single request but the underlying network connection to the HTTP server may be transparently shared by other instances. Calling the close() methods on the InputStream or OutputStream of an HttpURLConnection after a request may free network resources associated with this instance but has no effect on any shared persistent connection. Calling the disconnect() method may close the underlying socket if a persistent connection is otherwise idle at that time.<P><DL><DT><B>Since: </B><DD>JDK1.1</DD><DT><B>See Also: </B><DD><A HREF="../../java/net/HttpURLConnection.html#disconnect()"><CODE>disconnect()</CODE></A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_ACCEPTED">HTTP_ACCEPTED</A></B></CODE><BR> HTTP Status-Code 202: Accepted.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_BAD_GATEWAY">HTTP_BAD_GATEWAY</A></B></CODE><BR> HTTP Status-Code 502: Bad Gateway.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_BAD_METHOD">HTTP_BAD_METHOD</A></B></CODE><BR> HTTP Status-Code 405: Method Not Allowed.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_BAD_REQUEST">HTTP_BAD_REQUEST</A></B></CODE><BR> HTTP Status-Code 400: Bad Request.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_CLIENT_TIMEOUT">HTTP_CLIENT_TIMEOUT</A></B></CODE><BR> HTTP Status-Code 408: Request Time-Out.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_CONFLICT">HTTP_CONFLICT</A></B></CODE><BR> HTTP Status-Code 409: Conflict.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_CREATED">HTTP_CREATED</A></B></CODE><BR> HTTP Status-Code 201: Created.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_ENTITY_TOO_LARGE">HTTP_ENTITY_TOO_LARGE</A></B></CODE><BR> HTTP Status-Code 413: Request Entity Too Large.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_FORBIDDEN">HTTP_FORBIDDEN</A></B></CODE><BR> HTTP Status-Code 403: Forbidden.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_GATEWAY_TIMEOUT">HTTP_GATEWAY_TIMEOUT</A></B></CODE><BR> HTTP Status-Code 504: Gateway Timeout.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_GONE">HTTP_GONE</A></B></CODE><BR> HTTP Status-Code 410: Gone.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_INTERNAL_ERROR">HTTP_INTERNAL_ERROR</A></B></CODE><BR> HTTP Status-Code 500: Internal Server Error.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_LENGTH_REQUIRED">HTTP_LENGTH_REQUIRED</A></B></CODE><BR> HTTP Status-Code 411: Length Required.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_MOVED_PERM">HTTP_MOVED_PERM</A></B></CODE><BR> HTTP Status-Code 301: Moved Permanently.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_MOVED_TEMP">HTTP_MOVED_TEMP</A></B></CODE><BR> HTTP Status-Code 302: Temporary Redirect.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_MULT_CHOICE">HTTP_MULT_CHOICE</A></B></CODE><BR> HTTP Status-Code 300: Multiple Choices.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_NO_CONTENT">HTTP_NO_CONTENT</A></B></CODE><BR> HTTP Status-Code 204: No Content.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_NOT_ACCEPTABLE">HTTP_NOT_ACCEPTABLE</A></B></CODE><BR> HTTP Status-Code 406: Not Acceptable.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_NOT_AUTHORITATIVE">HTTP_NOT_AUTHORITATIVE</A></B></CODE><BR> HTTP Status-Code 203: Non-Authoritative Information.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_NOT_FOUND">HTTP_NOT_FOUND</A></B></CODE><BR> HTTP Status-Code 404: Not Found.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_NOT_IMPLEMENTED">HTTP_NOT_IMPLEMENTED</A></B></CODE><BR> HTTP Status-Code 501: Not Implemented.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_NOT_MODIFIED">HTTP_NOT_MODIFIED</A></B></CODE><BR> HTTP Status-Code 304: Not Modified.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_OK">HTTP_OK</A></B></CODE><BR> HTTP Status-Code 200: OK.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_PARTIAL">HTTP_PARTIAL</A></B></CODE><BR> HTTP Status-Code 206: Partial Content.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_PAYMENT_REQUIRED">HTTP_PAYMENT_REQUIRED</A></B></CODE><BR> HTTP Status-Code 402: Payment Required.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_PRECON_FAILED">HTTP_PRECON_FAILED</A></B></CODE><BR> HTTP Status-Code 412: Precondition Failed.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_PROXY_AUTH">HTTP_PROXY_AUTH</A></B></CODE><BR> HTTP Status-Code 407: Proxy Authentication Required.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/HttpURLConnection.html#HTTP_REQ_TOO_LONG">HTTP_REQ_TOO_LONG</A></B></CODE><BR>⌨️ 快捷键说明
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