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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 17:20:25 PST 2003 --><TITLE>javax.servlet (Java 2 Platform Ent. Ed. v1.4)</TITLE><META NAME="keywords" CONTENT="javax.servlet package"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="javax.servlet (Java 2 Platform Ent. Ed. v1.4)";}</SCRIPT></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=3 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="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</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><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"> <A HREF="../../javax/security/jacc/package-summary.html"><B>PREV PACKAGE</B></A> <A HREF="../../javax/servlet/http/package-summary.html"><B>NEXT PACKAGE</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="package-summary.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></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><H2>Package javax.servlet</H2>The javax.servlet package contains a number of classes and interfaces thatdescribe and define the contr acts between a servlet class and theruntime environment provided for an insta nce of such a class by aconforming servlet container.<P><B>See:</B><BR> <A HREF="#package_description"><B>Description</B></A><P><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Interface Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/Filter.html" title="interface in javax.servlet">Filter</A></B></TD><TD>A filter is an object that performs filtering tasks on either the request to a resource (a servlet or static content), or on the response from a resource, or both. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/FilterChain.html" title="interface in javax.servlet">FilterChain</A></B></TD><TD>A FilterChain is an object provided by the servlet container to the developer giving a view into the invocation chain of a filtered request for a resource. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/FilterConfig.html" title="interface in javax.servlet">FilterConfig</A></B></TD><TD>A filter configuration object used by a servlet container to pass information to a filter during initialization.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/RequestDispatcher.html" title="interface in javax.servlet">RequestDispatcher</A></B></TD><TD>Defines an object that receives requests from the client and sends them to any resource (such as a servlet, HTML file, or JSP file) on the server. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/Servlet.html" title="interface in javax.servlet">Servlet</A></B></TD><TD>Defines methods that all servlets must implement. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletConfig.html" title="interface in javax.servlet">ServletConfig</A></B></TD><TD>A servlet configuration object used by a servlet container to pass information to a servlet during initialization.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletContext.html" title="interface in javax.servlet">ServletContext</A></B></TD><TD>Defines a set of methods that a servlet uses to communicate with its servlet container, for example, to get the MIME type of a file, dispatch requests, or write to a log file. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletContextAttributeListener.html" title="interface in javax.servlet">ServletContextAttributeListener</A></B></TD><TD>Implementations of this interface recieve notifications of changes to the attribute list on the servlet context of a web application. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletContextListener.html" title="interface in javax.servlet">ServletContextListener</A></B></TD><TD>Implementations of this interface recieve notifications about changes to the servlet context of the web application they are part of. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletRequest.html" title="interface in javax.servlet">ServletRequest</A></B></TD><TD>Defines an object to provide client request information to a servlet. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletRequestAttributeListener.html" title="interface in javax.servlet">ServletRequestAttributeListener</A></B></TD><TD>Implementations of this interface receive notifications of changes to the attribute list on the servlet request of a web application. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletRequestListener.html" title="interface in javax.servlet">ServletRequestListener</A></B></TD><TD>Implementations of this interface recieve notifications about changes to the servlet request of the web application they are part of. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletResponse.html" title="interface in javax.servlet">ServletResponse</A></B></TD><TD>Defines an object to assist a servlet in sending a response to the client. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/SingleThreadModel.html" title="interface in javax.servlet">SingleThreadModel</A></B></TD><TD><B>Deprecated.</B> <I>As of Java Servlet API 2.4, with no direct replacement.</I></TD></TR></TABLE> <P><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Class Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/GenericServlet.html" title="class in javax.servlet">GenericServlet</A></B></TD><TD>Defines a generic, protocol-independent servlet. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletContextAttributeEvent.html" title="class in javax.servlet">ServletContextAttributeEvent</A></B></TD><TD>This is the event class for notifications about changes to the attributes of the servlet context of a web application.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletContextEvent.html" title="class in javax.servlet">ServletContextEvent</A></B></TD><TD>This is the event class for notifications about changes to the servlet context of a web application.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletInputStream.html" title="class in javax.servlet">ServletInputStream</A></B></TD><TD>Provides an input stream for reading binary data from a client request, including an efficient <code>readLine</code> method for reading data one line at a time. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletOutputStream.html" title="class in javax.servlet">ServletOutputStream</A></B></TD><TD>Provides an output stream for sending binary data to the client. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletRequestAttributeEvent.html" title="class in javax.servlet">ServletRequestAttributeEvent</A></B></TD><TD>This is the event class for notifications about changes to the attributes of the servlet request of a web application.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletRequestEvent.html" title="class in javax.servlet">ServletRequestEvent</A></B></TD><TD>This is the event class for notifications about changes to the servlet request of a web application.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletRequestWrapper.html" title="class in javax.servlet">ServletRequestWrapper</A></B></TD><TD>Provides a convenient implementation of the ServletRequest interface that can be subclassed by developers wishing to adapt the request to a Servlet. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletResponseWrapper.html" title="class in javax.servlet">ServletResponseWrapper</A></B></TD><TD>Provides a convenient implementation of the ServletResponse interface that can be subclassed by developers wishing to adapt the response from a Servlet. </TD></TR></TABLE> <P><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Exception Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/ServletException.html" title="class in javax.servlet">ServletException</A></B></TD><TD>Defines a general exception a servlet can throw when it encounters difficulty.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../javax/servlet/UnavailableException.html" title="class in javax.servlet">UnavailableException</A></B></TD><TD>Defines an exception that a servlet or filter throws to indicate that it is permanently or temporarily unavailable. </TD></TR></TABLE> <P><A NAME="package_description"><!-- --></A><H2>Package javax.servlet Description</H2><P>The javax.servlet package contains a number of classes and interfaces thatdescribe and define the contr acts between a servlet class and theruntime environment provided for an insta nce of such a class by aconforming servlet container.<P><P><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> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</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><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Ent. 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