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<div class="subTitle">javax.servlet</div>
<h2 title="Interface ServletRequest" class="title">Interface ServletRequest</h2>
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<dt>All Known Subinterfaces:</dt>
<dd><a href="../../javax/servlet/http/HttpServletRequest.html" title="interface in javax.servlet.http">HttpServletRequest</a></dd>
</dl>
<dl>
<dt>All Known Implementing Classes:</dt>
<dd><a href="../../javax/servlet/http/HttpServletRequestWrapper.html" title="class in javax.servlet.http">HttpServletRequestWrapper</a>, <a href="../../javax/servlet/ServletRequestWrapper.html" title="class in javax.servlet">ServletRequestWrapper</a></dd>
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<pre>public interface <span class="typeNameLabel">ServletRequest</span></pre>
<div class="block">Defines an object to provide client request information to a servlet. The
servlet container creates a <code>ServletRequest</code> object and passes it
as an argument to the servlet's <code>service</code> method.
<p>
A <code>ServletRequest</code> object provides data including parameter name
and values, attributes, and an input stream. Interfaces that extend
<code>ServletRequest</code> can provide additional protocol-specific data
(for example, HTTP data is provided by
<a href="../../javax/servlet/http/HttpServletRequest.html" title="interface in javax.servlet.http"><code>HttpServletRequest</code></a>.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../javax/servlet/http/HttpServletRequest.html" title="interface in javax.servlet.http"><code>HttpServletRequest</code></a></dd>
</dl>
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<h3>Method Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd"> </span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="../../javax/servlet/AsyncContext.html" title="interface in javax.servlet">AsyncContext</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getAsyncContext--">getAsyncContext</a></span>()</code> </td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getAttribute-java.lang.String-">getAttribute</a></span>(java.lang.String name)</code>
<div class="block">Returns the value of the named attribute as an <code>Object</code>, or
<code>null</code> if no attribute of the given name exists.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>java.util.Enumeration<java.lang.String></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getAttributeNames--">getAttributeNames</a></span>()</code>
<div class="block">Returns an <code>Enumeration</code> containing the names of the
attributes available to this request.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getCharacterEncoding--">getCharacterEncoding</a></span>()</code>
<div class="block">Returns the name of the character encoding used in the body of this
request.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getContentLength--">getContentLength</a></span>()</code>
<div class="block">Returns the length, in bytes, of the request body and made available by
the input stream, or -1 if the length is not known.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getContentLengthLong--">getContentLengthLong</a></span>()</code>
<div class="block">Returns the length, in bytes, of the request body and made available by
the input stream, or -1 if the length is not known.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getContentType--">getContentType</a></span>()</code>
<div class="block">Returns the MIME type of the body of the request, or <code>null</code> if
the type is not known.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="../../javax/servlet/DispatcherType.html" title="enum in javax.servlet">DispatcherType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getDispatcherType--">getDispatcherType</a></span>()</code> </td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code><a href="../../javax/servlet/ServletInputStream.html" title="class in javax.servlet">ServletInputStream</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getInputStream--">getInputStream</a></span>()</code>
<div class="block">Retrieves the body of the request as binary data using a
<a href="../../javax/servlet/ServletInputStream.html" title="class in javax.servlet"><code>ServletInputStream</code></a>.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getLocalAddr--">getLocalAddr</a></span>()</code>
<div class="block">Returns the Internet Protocol (IP) address of the interface on which the
request was received.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>java.util.Locale</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getLocale--">getLocale</a></span>()</code>
<div class="block">Returns the preferred <code>Locale</code> that the client will accept
content in, based on the Accept-Language header.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>java.util.Enumeration<java.util.Locale></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getLocales--">getLocales</a></span>()</code>
<div class="block">Returns an <code>Enumeration</code> of <code>Locale</code> objects
indicating, in decreasing order starting with the preferred locale, the
locales that are acceptable to the client based on the Accept-Language
header.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getLocalName--">getLocalName</a></span>()</code>
<div class="block">Returns the host name of the Internet Protocol (IP) interface on which
the request was received.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getLocalPort--">getLocalPort</a></span>()</code>
<div class="block">Returns the Internet Protocol (IP) port number of the interface on which
the request was received.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getParameter-java.lang.String-">getParameter</a></span>(java.lang.String name)</code>
<div class="block">Returns the value of a request parameter as a <code>String</code>, or
<code>null</code> if the parameter does not exist.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>java.util.Map<java.lang.String,java.lang.String[]></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getParameterMap--">getParameterMap</a></span>()</code>
<div class="block">Returns a java.util.Map of the parameters of this request.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>java.util.Enumeration<java.lang.String></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getParameterNames--">getParameterNames</a></span>()</code>
<div class="block">Returns an <code>Enumeration</code> of <code>String</code> objects
containing the names of the parameters contained in this request.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>java.lang.String[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getParameterValues-java.lang.String-">getParameterValues</a></span>(java.lang.String name)</code>
<div class="block">Returns an array of <code>String</code> objects containing all of the
values the given request parameter has, or <code>null</code> if the
parameter does not exist.</div>
</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getProtocol--">getProtocol</a></span>()</code>
<div class="block">Returns the name and version of the protocol the request uses in the form
<i>protocol/majorVersion.minorVersion</i>, for example, HTTP/1.1.</div>
</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code>java.io.BufferedReader</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getReader--">getReader</a></span>()</code>
<div class="block">Retrieves the body of the request as character data using a
<code>BufferedReader</code>.</div>
</td>
</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getRealPath-java.lang.String-">getRealPath</a></span>(java.lang.String path)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>
<div class="block"><span class="deprecationComment">As of Version 2.1 of the Java Servlet API, use
<a href="../../javax/servlet/ServletContext.html#getRealPath-java.lang.String-"><code>ServletContext.getRealPath(java.lang.String)</code></a> instead.</span></div>
</div>
</td>
</tr>
<tr id="i21" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getRemoteAddr--">getRemoteAddr</a></span>()</code>
<div class="block">Returns the Internet Protocol (IP) address of the client or last proxy
that sent the request.</div>
</td>
</tr>
<tr id="i22" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getRemoteHost--">getRemoteHost</a></span>()</code>
<div class="block">Returns the fully qualified name of the client or the last proxy that
sent the request.</div>
</td>
</tr>
<tr id="i23" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getRemotePort--">getRemotePort</a></span>()</code>
<div class="block">Returns the Internet Protocol (IP) source port of the client or last
proxy that sent the request.</div>
</td>
</tr>
<tr id="i24" class="altColor">
<td class="colFirst"><code><a href="../../javax/servlet/RequestDispatcher.html" title="interface in javax.servlet">RequestDispatcher</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getRequestDispatcher-java.lang.String-">getRequestDispatcher</a></span>(java.lang.String path)</code>
<div class="block">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.</div>
</td>
</tr>
<tr id="i25" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getScheme--">getScheme</a></span>()</code>
<div class="block">Returns the name of the scheme used to make this request, for example,
<code>http</code>, <code>https</code>, or <code>ftp</code>.</div>
</td>
</tr>
<tr id="i26" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getServerName--">getServerName</a></span>()</code>
<div class="block">Returns the host name of the server to which the request was sent.</div>
</td>
</tr>
<tr id="i27" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getServerPort--">getServerPort</a></span>()</code>
<div class="block">Returns the port number to which the request was sent.</div>
</td>
</tr>
<tr id="i28" class="altColor">
<td class="colFirst"><code><a href="../../javax/servlet/ServletContext.html" title="interface in javax.servlet">ServletContext</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#getServletContext--">getServletContext</a></span>()</code> </td>
</tr>
<tr id="i29" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#isAsyncStarted--">isAsyncStarted</a></span>()</code> </td>
</tr>
<tr id="i30" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#isAsyncSupported--">isAsyncSupported</a></span>()</code> </td>
</tr>
<tr id="i31" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#isSecure--">isSecure</a></span>()</code>
<div class="block">Returns a boolean indicating whether this request was made using a secure
channel, such as HTTPS.</div>
</td>
</tr>
<tr id="i32" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#removeAttribute-java.lang.String-">removeAttribute</a></span>(java.lang.String name)</code>
<div class="block">Removes an attribute from this request.</div>
</td>
</tr>
<tr id="i33" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#setAttribute-java.lang.String-java.lang.Object-">setAttribute</a></span>(java.lang.String name,
java.lang.Object o)</code>
<div class="block">Stores an attribute in this request.</div>
</td>
</tr>
<tr id="i34" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#setCharacterEncoding-java.lang.String-">setCharacterEncoding</a></span>(java.lang.String env)</code>
<div class="block">Overrides the name of the character encoding used in the body of this
request.</div>
</td>
</tr>
<tr id="i35" class="rowColor">
<td class="colFirst"><code><a href="../../javax/servlet/AsyncContext.html" title="interface in javax.servlet">AsyncContext</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#startAsync--">startAsync</a></span>()</code> </td>
</tr>
<tr id="i36" class="altColor">
<td class="colFirst"><code><a href="../../javax/servlet/AsyncContext.html" title="interface in javax.servlet">AsyncContext</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/servlet/ServletRequest.html#startAsync-javax.servlet.ServletRequest-javax.servlet.ServletResponse-">startAsync</a></span>(<a href="../../javax/servlet/ServletRequest.html" title="interface in javax.servlet">ServletRequest</a> servletRequest,
<a href="../../javax/servlet/ServletResponse.html" title="interface in javax.servlet">ServletResponse</a> servletResponse)</code> </td>
</tr>
</table>
</li>
</ul>
</li>
</ul>
</div>
<div class="details">
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<li class="blockList">
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<li class="blockList"><a name="method.detail">
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<h3>Method Detail</h3>
<a name="getAttribute-java.lang.String-">
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<h4>getAttribute</h4>
<pre>java.lang.Object getAttribute(java.lang.String name)</pre>
<div class="block">Returns the value of the named attribute as an <code>Object</code>, or
<code>null</code> if no attribute of the given name exists.
<p>
Attributes can be set two ways. The servlet container may set attributes
to make available custom information about a request. For example, for
requests made using HTTPS, the attribute
<code>javax.servlet.request.X509Certificate</code> can be used to
retrieve information on the certificate of the client. Attributes can
also be set programatically using <a href="../../javax/servlet/ServletRequest.html#setAttribute-java.lang.String-java.lang.Object-"><code>setAttribute(java.lang.String, java.lang.Object)</code></a>.
This allows information to be embedded into a request before a
<a href="../../javax/servlet/RequestDispatcher.html" title="interface in javax.servlet"><code>RequestDispatcher</code></a> call.
<p>
Attribute names should follow the same conventions as package names.
Names beginning with <code>java.*</code> and <code>javax.*</code> are
reserved for use by the Servlet specification. Names beginning with
<code>sun.*</code>, <code>com.sun.*</code>, <code>oracle.*</code> and
<code>com.oracle.*</code>) are reserved for use by Oracle Corporation.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - a <code>String</code> specifying the name of the attribute</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an <code>Object</code> containing the value of the attribute, or
<code>null</code> if the attribute does not exist</dd>
</dl>
</li>
</ul>
<a name="getAttributeNames--">
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<h4>getAttributeNames</h4>
<pre>java.util.Enumeration<java.lang.String> getAttributeNames()</pre>
<div class="block">Returns an <code>Enumeration</code> containing the names of the
attributes available to this request. This method returns an empty
<code>Enumeration</code> if the request has no attributes available to
it.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an <code>Enumeration</code> of strings containing the names of the
request's attributes</dd>
</dl>
</li>
</ul>
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<h4>getCharacterEncoding</h4>
<pre>java.lang.String getCharacterEncoding()</pre>
<div class="block">Returns the name of the character encoding used in the body of this
request. This method returns <code>null</code> if the request does not
specify a character encoding</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>String</code> containing the name of the character
encoding, or <code>null</code> if the request does not specify a
character encoding</dd>
</dl>
</li>
</ul>
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<h4>setCharacterEncoding</h4>
<pre>void setCharacterEncoding(java.lang.String env)
throws java.io.UnsupportedEncodingException</pre>
<div class="block">Overrides the name of the character encoding used in the body of this
request. This method must be called prior to reading request parameters
or reading input using getReader().</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>env</code> - a <code>String</code> containing the name of the character
encoding.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.UnsupportedEncodingException</code> - if this is not a valid encoding</dd>
</dl>
</li>
</ul>
<a name="getContentLength--">
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<h4>getContentLength</h4>
<pre>int getContentLength()</pre>
<div class="block">Returns the length, in bytes, of the request body and made available by
the input stream, or -1 if the length is not known. For HTTP servlets,
same as the value of the CGI variable CONTENT_LENGTH.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an integer containing the length of the request body or -1 if the
length is not known or is greater than <code>Integer.MAX_VALUE</code></dd>
</dl>
</li>
</ul>
<a name="getContentLengthLong--">
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<h4>getContentLengthLong</h4>
<pre>long getContentLengthLong()</pre>
<div class="block">Returns the length, in bytes, of the request body and made available by
the input stream, or -1 if the length is not known. For HTTP servlets,
same as the value of the CGI variable CONTENT_LENGTH.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a long integer containing the length of the request body or -1 if
the length is not known</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 3.1</dd>
</dl>
</li>
</ul>
<a name="getContentType--">
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<h4>getContentType</h4>
<pre>java.lang.String getContentType()</pre>
<div class="block">Returns the MIME type of the body of the request, or <code>null</code> if
the type is not known. For HTTP servlets, same as the value of the CGI
variable CONTENT_TYPE.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>String</code> containing the name of the MIME type of the
request, or null if the type is not known</dd>
</dl>
</li>
</ul>
<a name="getInputStream--">
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<h4>getInputStream</h4>
<pre><a href="../../javax/servlet/ServletInputStream.html" title="class in javax.servlet">ServletInputStream</a> getInputStream()
throws java.io.IOException</pre>
<div class="block">Retrieves the body of the request as binary data using a
<a href="../../javax/servlet/ServletInputStream.html" title="class in javax.servlet"><code>ServletInputStream</code></a>. Either this method or <a href="../../javax/servlet/ServletRequest.html#getReader--"><code>getReader()</code></a> may
be called to read the body, not both.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <a href="../../javax/servlet/ServletInputStream.html" title="class in javax.servlet"><code>ServletInputStream</code></a> object containing the body of the
request</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.IllegalStateException</code> - if the <a href="../../javax/servlet/ServletRequest.html#getReader--"><code>getReader()</code></a> method has already been called
for this request</dd>
<dd><code>java.io.IOException</code> - if an input or output exception occurred</dd>
</dl>
</li>
</ul>
<a name="getParameter-java.lang.String-">
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<h4>getParameter</h4>
<pre>java.lang.String getParameter(java.lang.String name)</pre>
<div class="block">Returns the value of a request parameter as a <code>String</code>, or
<code>null</code> if the parameter does not exist. Request parameters are
extra information sent with the request. For HTTP servlets, parameters
are contained in the query string or posted form data.
<p>
You should only use this method when you are sure the parameter has only
one value. If the parameter might have more than one value, use
<a href="../../javax/servlet/ServletRequest.html#getParameterValues-java.lang.String-"><code>getParameterValues(java.lang.String)</code></a>.
<p>
If you use this method with a multivalued parameter, the value returned
is equal to the first value in the array returned by
<code>getParameterValues</code>.
<p>
If the parameter data was sent in the request body, such as occurs with
an HTTP POST request, then reading the body directly via
<a href="../../javax/servlet/ServletRequest.html#getInputStream--"><code>getInputStream()</code></a> or <a href="../../javax/servlet/ServletRequest.html#getReader--"><code>getReader()</code></a> can interfere with the
execution of this method.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - a <code>String</code> specifying the name of the parameter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>String</code> representing the single value of the
parameter</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../javax/servlet/ServletRequest.html#getParameterValues-java.lang.String-"><code>getParameterValues(java.lang.String)</code></a></dd>
</dl>
</li>
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<h4>getParameterNames</h4>
<pre>java.util.Enumeration<java.lang.String> getParameterNames()</pre>
<div class="block">Returns an <code>Enumeration</code> of <code>String</code> objects
containing the names of the parameters contained in this request. If the
request has no parameters, the method returns an empty
<code>Enumeration</code>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an <code>Enumeration</code> of <code>String</code> objects, each
<code>String</code> containing the name of a request parameter;
or an empty <code>Enumeration</code> if the request has no
parameters</dd>
</dl>
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<h4>getParameterValues</h4>
<pre>java.lang.String[] getParameterValues(java.lang.String name)</pre>
<div class="block">Returns an array of <code>String</code> objects containing all of the
values the given request parameter has, or <code>null</code> if the
parameter does not exist.
<p>
If the parameter has a single value, the array has a length of 1.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - a <code>String</code> containing the name of the parameter
whose value is requested</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an array of <code>String</code> objects containing the parameter's
values</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../javax/servlet/ServletRequest.html#getParameter-java.lang.String-"><code>getParameter(java.lang.String)</code></a></dd>
</dl>
</li>
</ul>
<a name="getParameterMap--">
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<h4>getParameterMap</h4>
<pre>java.util.Map<java.lang.String,java.lang.String[]> getParameterMap()</pre>
<div class="block">Returns a java.util.Map of the parameters of this request. Request
parameters are extra information sent with the request. For HTTP
servlets, parameters are contained in the query string or posted form
data.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an immutable java.util.Map containing parameter names as keys and
parameter values as map values. The keys in the parameter map are
of type String. The values in the parameter map are of type
String array.</dd>
</dl>
</li>
</ul>
<a name="getProtocol--">
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<h4>getProtocol</h4>
<pre>java.lang.String getProtocol()</pre>
<div class="block">Returns the name and version of the protocol the request uses in the form
<i>protocol/majorVersion.minorVersion</i>, for example, HTTP/1.1. For
HTTP servlets, the value returned is the same as the value of the CGI
variable <code>SERVER_PROTOCOL</code>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>String</code> containing the protocol name and version
number</dd>
</dl>
</li>
</ul>
<a name="getScheme--">
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<h4>getScheme</h4>
<pre>java.lang.String getScheme()</pre>
<div class="block">Returns the name of the scheme used to make this request, for example,
<code>http</code>, <code>https</code>, or <code>ftp</code>. Different
schemes have different rules for constructing URLs, as noted in RFC 1738.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>String</code> containing the name of the scheme used to
make this request</dd>
</dl>
</li>
</ul>
<a name="getServerName--">
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</a>
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<h4>getServerName</h4>
<pre>java.lang.String getServerName()</pre>
<div class="block">Returns the host name of the server to which the request was sent. It is
the value of the part before ":" in the <code>Host</code> header value,
if any, or the resolved server name, or the server IP address.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>String</code> containing the name of the server</dd>
</dl>
</li>
</ul>
<a name="getServerPort--">
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</a>
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<h4>getServerPort</h4>
<pre>int getServerPort()</pre>
<div class="block">Returns the port number to which the request was sent. It is the value of
the part after ":" in the <code>Host</code> header value, if any, or the
server port where the client connection was accepted on.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an integer specifying the port number</dd>
</dl>
</li>
</ul>
<a name="getReader--">
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<h4>getReader</h4>
<pre>java.io.BufferedReader getReader()
throws java.io.IOException</pre>
<div class="block">Retrieves the body of the request as character data using a
<code>BufferedReader</code>. The reader translates the character data
according to the character encoding used on the body. Either this method
or <a href="../../javax/servlet/ServletRequest.html#getInputStream--"><code>getInputStream()</code></a> may be called to read the body, not both.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>BufferedReader</code> containing the body of the request</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.UnsupportedEncodingException</code> - if the character set encoding used is not supported and
the text cannot be decoded</dd>
<dd><code>java.lang.IllegalStateException</code> - if <a href="../../javax/servlet/ServletRequest.html#getInputStream--"><code>getInputStream()</code></a> method has been called on this
request</dd>
<dd><code>java.io.IOException</code> - if an input or output exception occurred</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../javax/servlet/ServletRequest.html#getInputStream--"><code>getInputStream()</code></a></dd>
</dl>
</li>
</ul>
<a name="getRemoteAddr--">
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</a>
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<h4>getRemoteAddr</h4>
<pre>java.lang.String getRemoteAddr()</pre>
<div class="block">Returns the Internet Protocol (IP) address of the client or last proxy
that sent the request. For HTTP servlets, same as the value of the CGI
variable <code>REMOTE_ADDR</code>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>String</code> containing the IP address of the client
that sent the request</dd>
</dl>
</li>
</ul>
<a name="getRemoteHost--">
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</a>
<ul class="blockList">
<li class="blockList">
<h4>getRemoteHost</h4>
<pre>java.lang.String getRemoteHost()</pre>
<div class="block">Returns the fully qualified name of the client or the last proxy that
sent the request. If the engine cannot or chooses not to resolve the
hostname (to improve performance), this method returns the dotted-string
form of the IP address. For HTTP servlets, same as the value of the CGI
variable <code>REMOTE_HOST</code>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>String</code> containing the fully qualified name of the
client</dd>
</dl>
</li>
</ul>
<a name="setAttribute-java.lang.String-java.lang.Object-">
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<h4>setAttribute</h4>
<pre>void setAttribute(java.lang.String name,
java.lang.Object o)</pre>
<div class="block">Stores an attribute in this request. Attributes are reset between
requests. This method is most often used in conjunction with
<a href="../../javax/servlet/RequestDispatcher.html" title="interface in javax.servlet"><code>RequestDispatcher</code></a>.
<p>
Attribute names should follow the same conventions as package names.
Names beginning with <code>java.*</code> and <code>javax.*</code> are
reserved for use by the Servlet specification. Names beginning with
<code>sun.*</code>, <code>com.sun.*</code>, <code>oracle.*</code> and
<code>com.oracle.*</code>) are reserved for use by Oracle Corporation.
<br>
If the object passed in is null, the effect is the same as calling
<a href="../../javax/servlet/ServletRequest.html#removeAttribute-java.lang.String-"><code>removeAttribute(java.lang.String)</code></a>. <br>
It is warned that when the request is dispatched from the servlet resides
in a different web application by <code>RequestDispatcher</code>, the
object set by this method may not be correctly retrieved in the caller
servlet.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - a <code>String</code> specifying the name of the attribute</dd>
<dd><code>o</code> - the <code>Object</code> to be stored</dd>
</dl>
</li>
</ul>
<a name="removeAttribute-java.lang.String-">
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<h4>removeAttribute</h4>
<pre>void removeAttribute(java.lang.String name)</pre>
<div class="block">Removes an attribute from this request. This method is not generally
needed as attributes only persist as long as the request is being
handled.
<p>
Attribute names should follow the same conventions as package names.
Names beginning with <code>java.*</code> and <code>javax.*</code> are
reserved for use by the Servlet specification. Names beginning with
<code>sun.*</code>, <code>com.sun.*</code>, <code>oracle.*</code> and
<code>com.oracle.*</code>) are reserved for use by Oracle Corporation.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - a <code>String</code> specifying the name of the attribute to
remove</dd>
</dl>
</li>
</ul>
<a name="getLocale--">
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</a>
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<h4>getLocale</h4>
<pre>java.util.Locale getLocale()</pre>
<div class="block">Returns the preferred <code>Locale</code> that the client will accept
content in, based on the Accept-Language header. If the client request
doesn't provide an Accept-Language header, this method returns the
default locale for the server.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the preferred <code>Locale</code> for the client</dd>
</dl>
</li>
</ul>
<a name="getLocales--">
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</a>
<ul class="blockList">
<li class="blockList">
<h4>getLocales</h4>
<pre>java.util.Enumeration<java.util.Locale> getLocales()</pre>
<div class="block">Returns an <code>Enumeration</code> of <code>Locale</code> objects
indicating, in decreasing order starting with the preferred locale, the
locales that are acceptable to the client based on the Accept-Language
header. If the client request doesn't provide an Accept-Language header,
this method returns an <code>Enumeration</code> containing one
<code>Locale</code>, the default locale for the server.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an <code>Enumeration</code> of preferred <code>Locale</code>
objects for the client</dd>
</dl>
</li>
</ul>
<a name="isSecure--">
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<ul class="blockList">
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<h4>isSecure</h4>
<pre>boolean isSecure()</pre>
<div class="block">Returns a boolean indicating whether this request was made using a secure
channel, such as HTTPS.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a boolean indicating if the request was made using a secure
channel</dd>
</dl>
</li>
</ul>
<a name="getRequestDispatcher-java.lang.String-">
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<h4>getRequestDispatcher</h4>
<pre><a href="../../javax/servlet/RequestDispatcher.html" title="interface in javax.servlet">RequestDispatcher</a> getRequestDispatcher(java.lang.String path)</pre>
<div class="block">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. A <code>RequestDispatcher</code>
object can be used to forward a request to the resource or to include the
resource in a response. The resource can be dynamic or static.
<p>
The pathname specified may be relative, although it cannot extend outside
the current servlet context. If the path begins with a "/" it is
interpreted as relative to the current context root. This method returns
<code>null</code> if the servlet container cannot return a
<code>RequestDispatcher</code>.
<p>
The difference between this method and
<a href="../../javax/servlet/ServletContext.html#getRequestDispatcher-java.lang.String-"><code>ServletContext.getRequestDispatcher(java.lang.String)</code></a> is that this method can take
a relative path.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>path</code> - a <code>String</code> specifying the pathname to the resource.
If it is relative, it must be relative against the current
servlet.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>RequestDispatcher</code> object that acts as a wrapper for
the resource at the specified path, or <code>null</code> if the
servlet container cannot return a <code>RequestDispatcher</code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../javax/servlet/RequestDispatcher.html" title="interface in javax.servlet"><code>RequestDispatcher</code></a>,
<a href="../../javax/servlet/ServletContext.html#getRequestDispatcher-java.lang.String-"><code>ServletContext.getRequestDispatcher(java.lang.String)</code></a></dd>
</dl>
</li>
</ul>
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<h4>getRealPath</h4>
<pre>java.lang.String getRealPath(java.lang.String path)</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">As of Version 2.1 of the Java Servlet API, use
<a href="../../javax/servlet/ServletContext.html#getRealPath-java.lang.String-"><code>ServletContext.getRealPath(java.lang.String)</code></a> instead.</span></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>path</code> - The virtual path to be converted to a real path</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><a href="../../javax/servlet/ServletContext.html#getRealPath-java.lang.String-"><code>ServletContext.getRealPath(String)</code></a></dd>
</dl>
</li>
</ul>
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<h4>getRemotePort</h4>
<pre>int getRemotePort()</pre>
<div class="block">Returns the Internet Protocol (IP) source port of the client or last
proxy that sent the request.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an integer specifying the port number</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 2.4</dd>
</dl>
</li>
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<pre>java.lang.String getLocalName()</pre>
<div class="block">Returns the host name of the Internet Protocol (IP) interface on which
the request was received.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>String</code> containing the host name of the IP on which
the request was received.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 2.4</dd>
</dl>
</li>
</ul>
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<h4>getLocalAddr</h4>
<pre>java.lang.String getLocalAddr()</pre>
<div class="block">Returns the Internet Protocol (IP) address of the interface on which the
request was received.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a <code>String</code> containing the IP address on which the
request was received.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 2.4</dd>
</dl>
</li>
</ul>
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<pre>int getLocalPort()</pre>
<div class="block">Returns the Internet Protocol (IP) port number of the interface on which
the request was received.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an integer specifying the port number</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 2.4</dd>
</dl>
</li>
</ul>
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<pre><a href="../../javax/servlet/ServletContext.html" title="interface in javax.servlet">ServletContext</a> getServletContext()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>TODO</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 3.0 TODO SERVLET3 - Add comments</dd>
</dl>
</li>
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<pre><a href="../../javax/servlet/AsyncContext.html" title="interface in javax.servlet">AsyncContext</a> startAsync()
throws java.lang.IllegalStateException</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>TODO</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.IllegalStateException</code> - If async is not supported for this request</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 3.0 TODO SERVLET3 - Add comments</dd>
</dl>
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<pre><a href="../../javax/servlet/AsyncContext.html" title="interface in javax.servlet">AsyncContext</a> startAsync(<a href="../../javax/servlet/ServletRequest.html" title="interface in javax.servlet">ServletRequest</a> servletRequest,
<a href="../../javax/servlet/ServletResponse.html" title="interface in javax.servlet">ServletResponse</a> servletResponse)
throws java.lang.IllegalStateException</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>servletRequest</code> - The ServletRequest with which to initialise the
asynchronous context</dd>
<dd><code>servletResponse</code> - The ServletResponse with which to initialise the
asynchronous context</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>TODO</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.IllegalStateException</code> - If async is not supported for this request</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 3.0 TODO SERVLET3 - Add comments</dd>
</dl>
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<pre>boolean isAsyncStarted()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>TODO</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 3.0 TODO SERVLET3 - Add comments</dd>
</dl>
</li>
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<pre>boolean isAsyncSupported()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>TODO</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 3.0 TODO SERVLET3 - Add comments</dd>
</dl>
</li>
</ul>
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<h4>getAsyncContext</h4>
<pre><a href="../../javax/servlet/AsyncContext.html" title="interface in javax.servlet">AsyncContext</a> getAsyncContext()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>TODO</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.IllegalStateException</code> - if the request is not in asynchronous mode</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 3.0 TODO SERVLET3 - Add comments</dd>
</dl>
</li>
</ul>
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<h4>getDispatcherType</h4>
<pre><a href="../../javax/servlet/DispatcherType.html" title="enum in javax.servlet">DispatcherType</a> getDispatcherType()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>TODO</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Servlet 3.0 TODO SERVLET3 - Add comments</dd>
</dl>
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