httpservletrequest.html

j2ee api,很好的api。我这现在有

<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a <code>String</code> specifying the session
			ID, or <code>null</code> if the request did
			not specify a session ID<DT><B>See Also:</B><DD><A HREF="../../../javax/servlet/http/HttpServletRequest.html#isRequestedSessionIdValid()"><CODE>isRequestedSessionIdValid()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getRequestURI()"><!-- --></A><H3>
getRequestURI</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getRequestURI</B>()</PRE>
<DL>
<DD>Returns the part of this request's URL from the protocol
 name up to the query string in the first line of the HTTP request.
 The web container does not decode this String.
 For example:

 

 <table summary="Examples of Returned Values">
 <tr align=left><th>First line of HTTP request      </th>
 <th>     Returned Value</th>
 <tr><td>POST /some/path.html HTTP/1.1<td><td>/some/path.html
 <tr><td>GET http://foo.bar/a.html HTTP/1.0
 <td><td>/a.html
 <tr><td>HEAD /xyz?a=b HTTP/1.1<td><td>/xyz
 </table>

 <p>To reconstruct an URL with a scheme and host, use
 <A HREF="../../../javax/servlet/http/HttpUtils.html#getRequestURL(javax.servlet.http.HttpServletRequest)"><CODE>HttpUtils.getRequestURL(javax.servlet.http.HttpServletRequest)</CODE></A>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a <code>String</code> containing
			the part of the URL from the 
			protocol name up to the query string<DT><B>See Also:</B><DD><A HREF="../../../javax/servlet/http/HttpUtils.html#getRequestURL(javax.servlet.http.HttpServletRequest)"><CODE>HttpUtils.getRequestURL(javax.servlet.http.HttpServletRequest)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getRequestURL()"><!-- --></A><H3>
getRequestURL</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/StringBuffer.html" title="class or interface in java.lang">StringBuffer</A> <B>getRequestURL</B>()</PRE>
<DL>
<DD>Reconstructs the URL the client used to make the request.
 The returned URL contains a protocol, server name, port
 number, and server path, but it does not include query
 string parameters.

 <p>Because this method returns a <code>StringBuffer</code>,
 not a string, you can modify the URL easily, for example,
 to append query parameters.

 <p>This method is useful for creating redirect messages
 and for reporting errors.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a <code>StringBuffer</code> object containing
			the reconstructed URL</DL>
</DD>
</DL>
<HR>

<A NAME="getServletPath()"><!-- --></A><H3>
getServletPath</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getServletPath</B>()</PRE>
<DL>
<DD>Returns the part of this request's URL that calls
 the servlet. This path starts with a "/" character
 and includes either the servlet name or a path to
 the servlet, but does not include any extra path
 information or a query string. Same as the value of
 the CGI variable SCRIPT_NAME.

 <p>This method will return an empty string ("") if the
 servlet used to process this request was matched using
 the "/*" pattern.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a <code>String</code> containing
			the name or path of the servlet being
			called, as specified in the request URL,
			decoded, or an empty string if the servlet
			used to process the request is matched
			using the "/*" pattern.</DL>
</DD>
</DL>
<HR>

<A NAME="getSession(boolean)"><!-- --></A><H3>
getSession</H3>
<PRE>
public <A HREF="../../../javax/servlet/http/HttpSession.html" title="interface in javax.servlet.http">HttpSession</A> <B>getSession</B>(boolean&nbsp;create)</PRE>
<DL>
<DD>Returns the current <code>HttpSession</code>
 associated with this request or, if there is no
 current session and <code>create</code> is true, returns 
 a new session.

 <p>If <code>create</code> is <code>false</code>
 and the request has no valid <code>HttpSession</code>,
 this method returns <code>null</code>.

 <p>To make sure the session is properly maintained,
 you must call this method before 
 the response is committed. If the container is using cookies
 to maintain session integrity and is asked to create a new session
 when the response is committed, an IllegalStateException is thrown.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>create</CODE> - <code>true</code> to create
			a new session for this request if necessary; 
			<code>false</code> to return <code>null</code>
			if there's no current session
<DT><B>Returns:</B><DD>the <code>HttpSession</code> associated 
			with this request or <code>null</code> if
 			<code>create</code> is <code>false</code>
			and the request has no valid session<DT><B>See Also:</B><DD><A HREF="../../../javax/servlet/http/HttpServletRequest.html#getSession()"><CODE>getSession()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getSession()"><!-- --></A><H3>
getSession</H3>
<PRE>
public <A HREF="../../../javax/servlet/http/HttpSession.html" title="interface in javax.servlet.http">HttpSession</A> <B>getSession</B>()</PRE>
<DL>
<DD>Returns the current session associated with this request,
 or if the request does not have a session, creates one.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the <code>HttpSession</code> associated
			with this request<DT><B>See Also:</B><DD><A HREF="../../../javax/servlet/http/HttpServletRequest.html#getSession(boolean)"><CODE>getSession(boolean)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="isRequestedSessionIdValid()"><!-- --></A><H3>
isRequestedSessionIdValid</H3>
<PRE>
public boolean <B>isRequestedSessionIdValid</B>()</PRE>
<DL>
<DD>Checks whether the requested session ID is still valid.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD><code>true</code> if this
				request has an id for a valid session
				in the current session context;
				<code>false</code> otherwise<DT><B>See Also:</B><DD><A HREF="../../../javax/servlet/http/HttpServletRequest.html#getRequestedSessionId()"><CODE>getRequestedSessionId()</CODE></A>, 
<A HREF="../../../javax/servlet/http/HttpServletRequest.html#getSession(boolean)"><CODE>getSession(boolean)</CODE></A>, 
<A HREF="../../../javax/servlet/http/HttpSessionContext.html" title="interface in javax.servlet.http"><CODE>HttpSessionContext</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="isRequestedSessionIdFromCookie()"><!-- --></A><H3>
isRequestedSessionIdFromCookie</H3>
<PRE>
public boolean <B>isRequestedSessionIdFromCookie</B>()</PRE>
<DL>
<DD>Checks whether the requested session ID came in as a cookie.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD><code>true</code> if the session ID
				came in as a
				cookie; otherwise, <code>false</code><DT><B>See Also:</B><DD><A HREF="../../../javax/servlet/http/HttpServletRequest.html#getSession(boolean)"><CODE>getSession(boolean)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="isRequestedSessionIdFromURL()"><!-- --></A><H3>
isRequestedSessionIdFromURL</H3>
<PRE>
public boolean <B>isRequestedSessionIdFromURL</B>()</PRE>
<DL>
<DD>Checks whether the requested session ID came in as part of the 
 request URL.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD><code>true</code> if the session ID
				came in as part of a URL; otherwise,
				<code>false</code><DT><B>See Also:</B><DD><A HREF="../../../javax/servlet/http/HttpServletRequest.html#getSession(boolean)"><CODE>getSession(boolean)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="isRequestedSessionIdFromUrl()"><!-- --></A><H3>
isRequestedSessionIdFromUrl</H3>
<PRE>
public boolean <B>isRequestedSessionIdFromUrl</B>()</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>As of Version 2.1 of the Java Servlet
				API, use <A HREF="../../../javax/servlet/http/HttpServletRequest.html#isRequestedSessionIdFromURL()"><CODE>isRequestedSessionIdFromURL()</CODE></A>
				instead.</I>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<!-- ========= END OF CLASS DATA ========= -->
<HR>


<!-- ======= START OF BOTTOM NAVBAR ====== -->
<A NAME="navbar_bottom"><!-- --></A>
<A HREF="#skip-navbar_bottom" title="Skip navigation links"></A>
<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY="">
<TR>
<TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1">
<A NAME="navbar_bottom_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>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A>&nbsp;</TD>
  <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> &nbsp;<FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A>&nbsp;</TD>
  </TR>
</TABLE>
</TD>
<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>
<b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Ent. Ed. v1.4</b></EM>
</TD>
</TR>

<TR>
<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
&nbsp;PREV CLASS&nbsp;
&nbsp;<A HREF="../../../javax/servlet/http/HttpServletResponse.html" title="interface in javax.servlet.http"><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>  &nbsp;
&nbsp;<A HREF="HttpServletRequest.html" target="_top"><B>NO FRAMES</B></A>  &nbsp;
&nbsp;<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:&nbsp;NESTED&nbsp;|&nbsp;<A HREF="#field_summary">FIELD</A>&nbsp;|&nbsp;CONSTR&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
DETAIL:&nbsp;<A HREF="#field_detail">FIELD</A>&nbsp;|&nbsp;CONSTR&nbsp;|&nbsp;<A HREF="#method_detail">METHOD</A></FONT></TD>
</TR>
</TABLE>
<A NAME="skip-navbar_bottom"></A>
<!-- ======== END OF BOTTOM NAVBAR ======= -->

<HR>
<font size="-1"><a href="http://java.sun.com/webapps/bugreport">Submit a bug or feature</a> <p>Copyright 2003 Sun Microsystems, Inc. All rights reserved.</font>
</BODY>
</HTML>