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ServletContext (Servlet API Documentation)
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SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD>
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DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD>
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javax.servlet</FONT>
<BR>
Interface ServletContext</H2>
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<DL>
<DT>public interface <B>ServletContext</B></DL>
<P>
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.
<p>There is one context per "web application" per Java Virtual Machine. (A
"web application" is a collection of servlets and content installed under a
specific subset of the server's URL namespace such as <code>/catalog</code>
and possibly installed via a <code>.war</code> file.)
<p>In the case of a web
application marked "distributed" in its deployment descriptor, there will
be one context instance for each virtual machine. In this situation, the
context cannot be used as a location to share global information (because
the information won't be truly global). Use an external resource like
a database instead.
<p>The <code>ServletContext</code> object is contained within
the <A HREF="../../javax/servlet/ServletConfig.html" title="interface in javax.servlet"><CODE>ServletConfig</CODE></A> object, which the Web server provides the
servlet when the servlet is initialized.
<P>
<P>
<DL>
<DT><B>Version:</B></DT>
<DD>$Version$</DD>
<DT><B>Author:</B></DT>
<DD>Various</DD>
<DT><B>See Also:</B><DD><A HREF="../../javax/servlet/Servlet.html#getServletConfig()"><CODE>Servlet.getServletConfig()</CODE></A>,
<A HREF="../../javax/servlet/ServletConfig.html#getServletContext()"><CODE>ServletConfig.getServletContext()</CODE></A></DL>
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<B>Method Summary</B></FONT></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.Object</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getAttribute(java.lang.String)">getAttribute</A></B>(java.lang.String name)</CODE>
<BR>
Returns the servlet container attribute with the given name,
or <code>null</code> if there is no attribute by that name.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.util.Enumeration</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getAttributeNames()">getAttributeNames</A></B>()</CODE>
<BR>
Returns an <code>Enumeration</code> containing the
attribute names available
within this servlet context.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../javax/servlet/ServletContext.html" title="interface in javax.servlet">ServletContext</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getContext(java.lang.String)">getContext</A></B>(java.lang.String uripath)</CODE>
<BR>
Returns a <code>ServletContext</code> object that
corresponds to a specified URL on the server.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getInitParameter(java.lang.String)">getInitParameter</A></B>(java.lang.String name)</CODE>
<BR>
Returns a <code>String</code> containing the value of the named
context-wide initialization parameter, or <code>null</code> if the
parameter does not exist.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.util.Enumeration</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getInitParameterNames()">getInitParameterNames</A></B>()</CODE>
<BR>
Returns the names of the context's initialization parameters as an
<code>Enumeration</code> of <code>String</code> objects, or an
empty <code>Enumeration</code> if the context has no initialization
parameters.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getMajorVersion()">getMajorVersion</A></B>()</CODE>
<BR>
Returns the major version of the Java Servlet API that this
servlet container supports.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getMimeType(java.lang.String)">getMimeType</A></B>(java.lang.String file)</CODE>
<BR>
Returns the MIME type of the specified file, or <code>null</code> if
the MIME type is not known.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getMinorVersion()">getMinorVersion</A></B>()</CODE>
<BR>
Returns the minor version of the Servlet API that this
servlet container supports.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../javax/servlet/RequestDispatcher.html" title="interface in javax.servlet">RequestDispatcher</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getNamedDispatcher(java.lang.String)">getNamedDispatcher</A></B>(java.lang.String name)</CODE>
<BR>
Returns a <A HREF="../../javax/servlet/RequestDispatcher.html" title="interface in javax.servlet"><CODE>RequestDispatcher</CODE></A> object that acts
as a wrapper for the named servlet.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getRealPath(java.lang.String)">getRealPath</A></B>(java.lang.String path)</CODE>
<BR>
Returns a <code>String</code> containing the real path
for a given virtual path.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../javax/servlet/RequestDispatcher.html" title="interface in javax.servlet">RequestDispatcher</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getRequestDispatcher(java.lang.String)">getRequestDispatcher</A></B>(java.lang.String path)</CODE>
<BR>
Returns a <A HREF="../../javax/servlet/RequestDispatcher.html" title="interface in javax.servlet"><CODE>RequestDispatcher</CODE></A> object that acts
as a wrapper for the resource located at the given path.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.net.URL</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getResource(java.lang.String)">getResource</A></B>(java.lang.String path)</CODE>
<BR>
Returns a URL to the resource that is mapped to a specified
path.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.io.InputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getResourceAsStream(java.lang.String)">getResourceAsStream</A></B>(java.lang.String path)</CODE>
<BR>
Returns the resource located at the named path as
an <code>InputStream</code> object.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.util.Set</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../javax/servlet/ServletContext.html#getResourcePaths(java.lang.String)">getResourcePaths</A></B>(java.lang.String path)</CODE>
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