uTools-Manuals/docs/java/org/xml/sax/helpers/NamespaceSupport.html

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     org.xml.sax.helpers 
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<h2 class="title" title="Class NamespaceSupport">Class NamespaceSupport</h2>
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<hr/> <br/> <pre>public class <span class="typeNameLabel">NamespaceSupport</span>
extends <a href="../../../../java/lang/Object.html" title="class in java.lang">Object</a></pre>
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<span>封装使用SAX的应用程序或由SAX驱动程序内部使用的命名空间逻辑。</span>
<blockquote>
<span><em>This module, both source code and documentation, is in the Public Domain, and comes with <strong>NO WARRANTY</strong>.</em> See <a href="http://www.saxproject.org">http://www.saxproject.org</a> for further information.</span>
</blockquote>
<p> <span>该类封装了命名空间处理的逻辑：它跟踪每个上下文当前有效的声明，并将合格的XML名称自动处理到其命名空间部分中;</span> <span>它也可以相反地用于从命名空间生成XML qnames。</span> </p>
<p> <span>命名空间支持对象是可重用的，但必须在每个会话之间调用reset方法。</span> </p>
<p> <span>这是一个简单的会话：</span> </p>
<pre>  <span>String parts[] = new String[3];
 NamespaceSupport support = new NamespaceSupport();

 support.pushContext();
 support.declarePrefix("", "http://www.w3.org/1999/xhtml");
 support.declarePrefix("dc", "http://www.purl.org/dc#");

 parts = support.processName("p", parts, false);
 System.out.println("Namespace URI: " + parts[0]);
 System.out.println("Local name: " + parts[1]);
 System.out.println("Raw name: " + parts[2]);

 parts = support.processName("dc:title", parts, false);
 System.out.println("Namespace URI: " + parts[0]);
 System.out.println("Local name: " + parts[1]);
 System.out.println("Raw name: " + parts[2]);

 support.popContext();</span> </pre>
<p> <span>请注意，此类针对大多数元素不包含Namespace声明的用例进行了优化：如果为每个上下文重复相同的前缀/ URI映射（例如），则此类的效率会稍差一些。</span> </p>
<p> <span>虽然SAX驱动程序（解析器）可能会选择使用这个类来实现命名空间处理，但是它们不需要这样做。</span> <span>如果要使用命名空间信息，应用程序本身必须跟踪命名空间信息。</span> </p>
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<dl>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
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<dd>
         SAX 2.0 
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<!-- =========== FIELD SUMMARY =========== -->
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<!-- --> </a> <h3>Field Summary</h3>
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<span>Fields</span>
<span class="tabEnd"> </span>
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<tbody>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../java/lang/String.html" title="class in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#NSDECL">NSDECL</a></span></code>
<div class="block">
              命名空间声明URI为常量。 
            </div> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../java/lang/String.html" title="class in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#XMLNS">XMLNS</a></span></code>
<div class="block">
              XML命名空间URI作为常量。 
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</table> </li>
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<span>构造方法</span>
<span class="tabEnd"> </span>
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<tbody>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#NamespaceSupport--">NamespaceSupport</a></span>()</code>
<div class="block">
              创建一个新的Namespace支持对象。 
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</tr>
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<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t2"><span><a href="javascript:show(2);">接口方法</a></span><span class="tabEnd"> </span></span>
<span class="tableTab" id="t4"><span><a href="javascript:show(8);">具体的方法</a></span><span class="tabEnd"> </span></span>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#declarePrefix-java.lang.String-java.lang.String-">declarePrefix</a></span>(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> prefix, <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> uri)</code>
<div class="block">
              声明一个命名空间前缀。 
            </div> </td>
</tr>
<tr class="rowColor" id="i1">
<td class="colFirst"><code><a href="../../../../java/util/Enumeration.html" title="interface in java.util">Enumeration</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getDeclaredPrefixes--">getDeclaredPrefixes</a></span>()</code>
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              返回在此上下文中声明的所有前缀的枚举。 
            </div> </td>
</tr>
<tr class="altColor" id="i2">
<td class="colFirst"><code><a href="../../../../java/lang/String.html" title="class in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefix-java.lang.String-">getPrefix</a></span>(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> uri)</code>
<div class="block">
              返回映射到命名空间URI的前缀之一。 
            </div> </td>
</tr>
<tr class="rowColor" id="i3">
<td class="colFirst"><code><a href="../../../../java/util/Enumeration.html" title="interface in java.util">Enumeration</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefixes--">getPrefixes</a></span>()</code>
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              返回其声明在当前上下文中处于活动状态的所有前缀的枚举。 
            </div> </td>
</tr>
<tr class="altColor" id="i4">
<td class="colFirst"><code><a href="../../../../java/util/Enumeration.html" title="interface in java.util">Enumeration</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefixes-java.lang.String-">getPrefixes</a></span>(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> uri)</code>
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              返回给定URI的所有前缀的枚举，其声明在当前上下文中处于活动状态。 
            </div> </td>
</tr>
<tr class="rowColor" id="i5">
<td class="colFirst"><code><a href="../../../../java/lang/String.html" title="class in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getURI-java.lang.String-">getURI</a></span>(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> prefix)</code>
<div class="block">
              查找前缀并获取当前映射的命名空间URI。 
            </div> </td>
</tr>
<tr class="altColor" id="i6">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#isNamespaceDeclUris--">isNamespaceDeclUris</a></span>()</code>
<div class="block">
              如果将命名空间声明属性放入命名空间，则返回true。 
            </div> </td>
</tr>
<tr class="rowColor" id="i7">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#popContext--">popContext</a></span>()</code>
<div class="block">
              恢复到以前的命名空间上下文。 
            </div> </td>
</tr>
<tr class="altColor" id="i8">
<td class="colFirst"><code><a href="../../../../java/lang/String.html" title="class in java.lang">String</a>[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#processName-java.lang.String-java.lang.String:A-boolean-">processName</a></span>(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> qName, <a href="../../../../java/lang/String.html" title="class in java.lang">String</a>[] parts, boolean isAttribute)</code>
<div class="block">
              处理原始XML限定名，之后在目前情况下的所有声明已被处理 
             <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#declarePrefix-java.lang.String-java.lang.String-"><code>declarePrefix()</code></a> 。 
            </div> </td>
</tr>
<tr class="rowColor" id="i9">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#pushContext--">pushContext</a></span>()</code>
<div class="block">
              启动一个新的命名空间上下文。 
            </div> </td>
</tr>
<tr class="altColor" id="i10">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#reset--">reset</a></span>()</code>
<div class="block">
              重置此Namespace支持对象以供重用。 
            </div> </td>
</tr>
<tr class="rowColor" id="i11">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#setNamespaceDeclUris-boolean-">setNamespaceDeclUris</a></span>(boolean value)</code>
<div class="block">
              控制命名空间声明属性是否被
             <code>processName()</code>放入 
             <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#NSDECL"><code>NSDECL</code></a>命名 
             <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#processName-java.lang.String-java.lang.String:A-boolean-">空间中</a> 。 
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</tr>
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<!-- --> </a> <h3>Methods inherited from class java.lang.<a href="../../../../java/lang/Object.html" title="class in java.lang">Object</a></h3> <code><a href="../../../../java/lang/Object.html#clone--">clone</a>, <a href="../../../../java/lang/Object.html#equals-java.lang.Object-">equals</a>, <a href="../../../../java/lang/Object.html#finalize--">finalize</a>, <a href="../../../../java/lang/Object.html#getClass--">getClass</a>, <a href="../../../../java/lang/Object.html#hashCode--">hashCode</a>, <a href="../../../../java/lang/Object.html#notify--">notify</a>, <a href="../../../../java/lang/Object.html#notifyAll--">notifyAll</a>, <a href="../../../../java/lang/Object.html#toString--">toString</a>, <a href="../../../../java/lang/Object.html#wait--">wait</a>, <a href="../../../../java/lang/Object.html#wait-long-">wait</a>, <a href="../../../../java/lang/Object.html#wait-long-int-">wait</a></code></li>
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<li class="blockList"> <h4>XMLNS</h4> <pre>public static final <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> XMLNS</pre>
<div class="block">
<span>XML命名空间URI作为常量。</span>
<span>值为<code>http://www.w3.org/XML/1998/namespace</code> ，如“XML中的命名空间”*中所定义。</span>
<p> <span>这是自动映射到“xml”前缀的命名空间URI。</span> </p>
</div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../constant-values.html#org.xml.sax.helpers.NamespaceSupport.XMLNS">Constant Field Values</a>
</dd>
</dl> </li>
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<li class="blockList"> <h4>NSDECL</h4> <pre>public static final <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> NSDECL</pre>
<div class="block">
<span>命名空间声明URI为常量。</span>
<span>值为<code>http://www.w3.org/xmlns/2000/</code> ，如“XML中的命名空间”推荐与向后不兼容的错误定义的。</span>
<span>因为这个勘误后SAX2，SAX2默认为原来的建议，通常不会使用这个URI。</span>
<p> <span>这是可选地应用于<em>xmlns</em>和<em>xmlns：*</em>属性的命名空间URI，用于声明命名空间。</span> </p>
</div>
<dl>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
</dt>
<dd>
             SAX 2.1alpha 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#setNamespaceDeclUris-boolean-"><code>setNamespaceDeclUris(boolean)</code></a> ， 
            <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#isNamespaceDeclUris--"><code>isNamespaceDeclUris()</code></a> ， 
            <a href="../../../../constant-values.html#org.xml.sax.helpers.NamespaceSupport.NSDECL">Constant Field Values</a>
</dd>
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<li class="blockList"> <h4>NamespaceSupport</h4> <pre>public NamespaceSupport()</pre>
<div class="block">
            创建一个新的Namespace支持对象。 
          </div> </li>
</ul> </li>
</ul>
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<li class="blockList"> <h4>reset</h4> <pre>public void reset()</pre>
<div class="block">
<span>重置此Namespace支持对象以供重用。</span>
<p> <span>在重新使用新会话的Namespace支持对象之前，需要调用此方法。</span> <span>如果要支持命名空间声明URI，则该标志也必须设置为非默认值。</span> </p>
</div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#setNamespaceDeclUris-boolean-"><code>setNamespaceDeclUris(boolean)</code></a>
</dd>
</dl> </li>
</ul> <a name="pushContext--">
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<li class="blockList"> <h4>pushContext</h4> <pre>public void pushContext()</pre>
<div class="block">
<span>启动一个新的命名空间上下文。</span>
<span>新的上下文将自动继承其父上下文的声明，但它也将跟踪在此上下文中进行的声明。</span>
<p> <span>事件回调代码应该为每个元素启动一个新的上下文。</span> <span>这意味着准备在两个地方之间调用。</span> <span>对于不包含命名空间声明的元素， <em>ContentHandler.startElement（）</em>回调是正确的位置。</span> <span>对于具有这种声明的元素，它在第一个<em>ContentHandler.startPrefixMapping（）</em>回调中完成。</span> <span>可以使用布尔标志来跟踪上下文是否已经开始。</span> <span>当调用这些方法之一时，它会检查该标志以查看是否需要启动新的上下文。</span> <span>如果是这样，它启动上下文并设置该标志。</span> <span>在<em>ContentHandler.startElement（）</em>这样做之后，它总是清除该标志。</span> </p>
<p> <span>通常，SAX驱动程序将在每个XML元素的开头推送一个新的上下文。</span> <span>然后，他们首先执行属性来处理所有命名空间声明，从而使<em>ContentHandler.startPrefixMapping（）</em>回调。</span> <span>然后进行第二次传递，以确定所有属性和元素名称的命名空间限定名称。</span> <span>最后， <em>ContentHandler.startElement（）</em>回调的所有信息都可用，因此可以被创建。</span> </p>
<p> <span>命名空间支持对象始终以已经有效的基本上下文开头：在这种情况下，只会声明“xml”前缀。</span> </p>
</div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../../../org/xml/sax/ContentHandler.html" title="org.xml.sax中的接口"><code>ContentHandler</code></a> ， <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#popContext--"><code>popContext()</code></a></span>
</dd>
</dl> </li>
</ul> <a name="popContext--">
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<ul class="blockList">
<li class="blockList"> <h4>popContext</h4> <pre>public void popContext()</pre>
<div class="block">
<span>恢复到以前的命名空间上下文。</span>
<p> <span>通常，您应该弹出每个XML元素末尾的上下文。</span> <span>弹出上下文后，所有先前有效的命名空间前缀映射都将被还原。</span> </p>
<p> <span>弹出上下文后，您不得尝试声明额外的命名空间前缀，除非您首先推送另一个上下文。</span> </p>
</div>
<dl>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#pushContext--"><code>pushContext()</code></a>
</dd>
</dl> </li>
</ul> <a name="declarePrefix-java.lang.String-java.lang.String-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>declarePrefix</h4> <pre>public boolean declarePrefix(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> prefix,
                             <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> uri)</pre>
<div class="block">
<span>声明一个命名空间前缀。</span>
<span>引用前必须声明所有前缀。</span>
<span>例如，SAX驱动程序（解析器）将以两遍的方式扫描元素的属性：首先用于命名空间声明，然后使用<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#processName-java.lang.String-java.lang.String:A-boolean-"><code>processName()</code></a>解释前缀（可能重新定义）前缀的第二遍。</span>
<p> <span>此方法在当前命名空间上下文中声明一个前缀;</span> <span>前缀将保持有效，直到弹出上下文，除非它在后代上下文中被隐藏。</span> </p>
<p> <span>要声明默认元素Namespace，请使用空字符串作为前缀。</span> </p>
<p> <span>请注意，此库中存在不对称： <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefix-java.lang.String-"><code>getPrefix</code></a>不会返回“”前缀，即使已声明默认元素命名空间。</span> <span>要检查默认命名空间，您必须使用<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getURI-java.lang.String-"><code>getURI</code>显式查找</a> 。</span> <span>存在这种不对称性，以便更容易地查找属性名称的前缀，其中不允许使用默认前缀。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<span><code>prefix</code> - 要声明的前缀，或用于指示默认元素命名空间的空字符串。</span>
<span>这可能永远不会有值“xml”或“xmlns”。</span>
</dd>
<dd>
<code>uri</code> - 与前缀关联的命名空间URI。 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             如果前缀合法，则为true，否则为false 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#processName-java.lang.String-java.lang.String:A-boolean-"><code>processName(java.lang.String, java.lang.String[], boolean)</code></a> ， 
            <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getURI-java.lang.String-"><code>getURI(java.lang.String)</code></a> ， 
            <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefix-java.lang.String-"><code>getPrefix(java.lang.String)</code></a>
</dd>
</dl> </li>
</ul> <a name="processName-java.lang.String-java.lang.String:A-boolean-">
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<ul class="blockList">
<li class="blockList"> <h4>processName</h4> <pre>public <a href="../../../../java/lang/String.html" title="class in java.lang">String</a>[] processName(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> qName,
                            <a href="../../../../java/lang/String.html" title="class in java.lang">String</a>[] parts,
                            boolean isAttribute)</pre>
<div class="block">
<span>处理原始XML限定名，之后在目前情况下的所有声明已被处理<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#declarePrefix-java.lang.String-java.lang.String-"><code>declarePrefix()</code></a> 。</span>
<p> <span>此方法通过删除前缀并在当前声明的前缀中查找原始XML限定名称来处理当前上下文中的原始XML限定名称。</span> <span>返回值将是调用者提供的数组，填入如下：</span> </p>
<dl>
<dt>
<span>零件[0]</span>
</dt>
<dd>
<span>命名空间URI，或空字符串，如果没有使用。</span>
</dd>
<dt>
<span>零件[1]</span>
</dt>
<dd>
<span>本地名称（无前缀）。</span>
</dd>
<dt>
<span>零件[2]</span>
</dt>
<dd>
<span>原始的原始名称。</span>
</dd>
</dl>
<p> <span>数组中的所有字符串将被内化。</span> <span>如果原始名称的前缀未被声明，那么返回值将为null。</span> </p>
<p> <span>请注意，属性名称的处理方式与元素名称不同：未校正的元素名称将接收默认名称空间（如果有），而未定义的属性名称将不会。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>qName</code> - 要处理的XML限定名称。 
           </dd>
<dd>
<code>parts</code> - 由调用者提供的一个数组，能够容纳至少三个成员。 
           </dd>
<dd>
<code>isAttribute</code> - 表示这是属性名称（true）还是元素名称（false）的标志。 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<span>提供的数组包含三个表示命名空间URI（或空字符串）的内部字符串，本地名称和XML限定名称;</span>
<span>如果有未声明的前缀，则为null。</span>
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#declarePrefix-java.lang.String-java.lang.String-"><code>declarePrefix(java.lang.String, java.lang.String)</code></a> ， 
            <a href="../../../../java/lang/String.html#intern--"><code>String.intern()</code></a>
</dd>
</dl> </li>
</ul> <a name="getURI-java.lang.String-">
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<ul class="blockList">
<li class="blockList"> <h4>getURI</h4> <pre>public <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> getURI(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> prefix)</pre>
<div class="block">
<span>查找前缀并获取当前映射的命名空间URI。</span>
<p> <span>此方法查找当前上下文中的前缀。</span> <span>使用空字符串（“”）作为默认命名空间。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>prefix</code> - 要查找的前缀。 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             关联的命名空间URI，如果前缀在此上下文中未声明，则为null。 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefix-java.lang.String-"><code>getPrefix(java.lang.String)</code></a> ， 
            <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefixes--"><code>getPrefixes()</code></a>
</dd>
</dl> </li>
</ul> <a name="getPrefixes--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getPrefixes</h4> <pre>public <a href="../../../../java/util/Enumeration.html" title="interface in java.util">Enumeration</a> getPrefixes()</pre>
<div class="block">
<span>返回其声明在当前上下文中处于活动状态的所有前缀的枚举。</span>
<span>这包括父上下文中尚未被覆盖的声明。</span>
<p> <span><strong>注意：</strong>如果有默认的前缀，则不会在此枚举中返回;</span> <span>使用参数为“”的<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getURI-java.lang.String-"><code>getURI</code></a>检查默认前缀。</span> </p>
</div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             枚举前缀（从不为空）。 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getDeclaredPrefixes--"><code>getDeclaredPrefixes()</code></a> ， 
            <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getURI-java.lang.String-"><code>getURI(java.lang.String)</code></a>
</dd>
</dl> </li>
</ul> <a name="getPrefix-java.lang.String-">
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<ul class="blockList">
<li class="blockList"> <h4>getPrefix</h4> <pre>public <a href="../../../../java/lang/String.html" title="class in java.lang">String</a> getPrefix(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> uri)</pre>
<div class="block">
<span>返回映射到命名空间URI的前缀之一。</span>
<p> <span>如果多个前缀当前映射到同一个URI，则该方法将进行任意选择;</span> <span>如果您想要所有的前缀，请<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefixes--">改用<code>getPrefixes()</code></a>方法。</span> </p>
<p> <span><strong>注意：</strong>这将永远不会返回空（默认）前缀;</span> <span>要检查默认前缀，请使用参数为“”的<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getURI-java.lang.String-"><code>getURI</code></a>方法。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>uri</code> - 命名空间URI 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             当前映射到提供的URI的前缀之一，如果没有映射，则为空，或者将URI分配给默认命名空间 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefixes-java.lang.String-"><code>getPrefixes(java.lang.String)</code></a> ， 
            <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getURI-java.lang.String-"><code>getURI(java.lang.String)</code></a>
</dd>
</dl> </li>
</ul> <a name="getPrefixes-java.lang.String-">
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<ul class="blockList">
<li class="blockList"> <h4>getPrefixes</h4> <pre>public <a href="../../../../java/util/Enumeration.html" title="interface in java.util">Enumeration</a> getPrefixes(<a href="../../../../java/lang/String.html" title="class in java.lang">String</a> uri)</pre>
<div class="block">
<span>返回给定URI的所有前缀的枚举，其声明在当前上下文中处于活动状态。</span>
<span>这包括父上下文中尚未被覆盖的声明。</span>
<p> <span>此方法返回映射到特定命名空间URI的前缀。</span> <span>将包括xml：前缀。</span> <span>如果您只想要一个映射到命名空间URI的前缀，并且您不在乎哪个前缀，请<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefix-java.lang.String-">改用<code>getPrefix</code></a>方法。</span> </p>
<p> <span><strong>注意：</strong>空（默认）前缀<em>从不</em>包含在此枚举中;</span> <span>检查是否存在默认名称空间，请使用参数“”“的<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getURI-java.lang.String-"><code>getURI</code></a>方法。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>uri</code> - 命名空间URI。 
           </dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             枚举前缀（从不为空）。 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefix-java.lang.String-"><code>getPrefix(java.lang.String)</code></a> ， 
            <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getDeclaredPrefixes--"><code>getDeclaredPrefixes()</code></a> ， 
            <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getURI-java.lang.String-"><code>getURI(java.lang.String)</code></a>
</dd>
</dl> </li>
</ul> <a name="getDeclaredPrefixes--">
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<ul class="blockList">
<li class="blockList"> <h4>getDeclaredPrefixes</h4> <pre>public <a href="../../../../java/util/Enumeration.html" title="interface in java.util">Enumeration</a> getDeclaredPrefixes()</pre>
<div class="block">
<span>返回在此上下文中声明的所有前缀的枚举。</span>
<p> <span>空（默认）前缀将包含在此枚举中;</span> <span>请注意，此行为与<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefix-java.lang.String-"><code>getPrefix(java.lang.String)</code></a>和<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefixes--"><code>getPrefixes()</code>不同</a> 。</span> </p>
</div>
<dl>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
             枚举在此上下文中声明的所有前缀。 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getPrefixes--"><code>getPrefixes()</code></a> ， 
            <a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#getURI-java.lang.String-"><code>getURI(java.lang.String)</code></a>
</dd>
</dl> </li>
</ul> <a name="setNamespaceDeclUris-boolean-">
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<ul class="blockList">
<li class="blockList"> <h4>setNamespaceDeclUris</h4> <pre>public void setNamespaceDeclUris(boolean value)</pre>
<div class="block">
<span>控制命名空间声明属性是否被<code>processName()</code>放入<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#NSDECL"><code>NSDECL</code></a>命名<a href="../../../../org/xml/sax/helpers/NamespaceSupport.html#processName-java.lang.String-java.lang.String:A-boolean-">空间中</a> 。</span>
<span>这可能只有在任何上下文被推送之前才能更改。</span>
</div>
<dl>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../../java/lang/IllegalStateException.html" title="class in java.lang">IllegalStateException</a></code> - 尝试在任何上下文被推送后设置此选项。 
           </dd>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
</dt>
<dd>
             SAX 2.1alpha 
           </dd>
</dl> </li>
</ul> <a name="isNamespaceDeclUris--">
<!-- --> </a>
<ul class="blockListLast">
<li class="blockList"> <h4>isNamespaceDeclUris</h4> <pre>public boolean isNamespaceDeclUris()</pre>
<div class="block">
<span>如果将命名空间声明属性放入命名空间，则返回true。</span>
<span>此行为不是默认值。</span>
</div>
<dl>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
</dt>
<dd>
             SAX 2.1alpha 
           </dd>
</dl> </li>
</ul> </li>
</ul> </li>
</ul>
</div>
</div>