uTools-Manuals/docs/java/javax/activation/FileDataSource.html

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     javax.activation 
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<h2 class="title" title="Class FileDataSource">Class FileDataSource</h2>
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<li><a href="../../java/lang/Object.html" title="class in java.lang">java.lang.Object</a></li>
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<li>javax.activation.FileDataSource</li>
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<dt>
         All Implemented Interfaces: 
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<span><a href="../../javax/activation/DataSource.html" title="javax.activation中的接口">DataSource</a></span>
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<hr/> <br/> <pre>public class <span class="typeNameLabel">FileDataSource</span>
extends <a href="../../java/lang/Object.html" title="class in java.lang">Object</a>
implements <a href="../../javax/activation/DataSource.html" title="interface in javax.activation">DataSource</a></pre>
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<span>FileDataSource类实现一个封装文件的简单DataSource对象。</span>
<span>它通过FileTypeMap对象提供数据打字服务。</span>
<p> <span><b>FileDataSource打字语义</b></span> </p>
<p> <span>FileDataSource类将文件的数据类型转换为从FileTypeMap类子类的对象。</span> <span><code>setFileTypeMap</code>方法可用于显式设置FileDataSource实例的FileTypeMap。</span> <span>如果没有设置FileTypeMap，FileDataSource将调用FileTypeMap的getDefaultFileTypeMap方法来获取系统的默认FileTypeMap。</span> </p>
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<span class="simpleTagLabel">从以下版本开始：</span>
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<dd>
         1.6 
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<dt>
<span class="seeLabel">另请参见：</span>
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<dd>
<span><a href="../../javax/activation/DataSource.html" title="javax.activation中的接口"><code>DataSource</code></a> ， <a href="../../javax/activation/FileTypeMap.html" title="javax.activation中的类"><code>FileTypeMap</code></a> ， <a href="../../javax/activation/MimetypesFileTypeMap.html" title="javax.activation中的类"><code>MimetypesFileTypeMap</code></a></span>
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<span>构造方法</span>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/activation/FileDataSource.html#FileDataSource-java.io.File-">FileDataSource</a></span>(<a href="../../java/io/File.html" title="class in java.io">File</a> file)</code>
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              从File对象创建FileDataSource。 
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<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/activation/FileDataSource.html#FileDataSource-java.lang.String-">FileDataSource</a></span>(<a href="../../java/lang/String.html" title="class in java.lang">String</a> name)</code>
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              从指定的路径名创建一个FileDataSource。 
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<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
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<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><a href="../../java/lang/String.html" title="class in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/activation/FileDataSource.html#getContentType--">getContentType</a></span>()</code>
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              此方法以字符串的形式返回数据的MIME类型。 
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<td class="colFirst"><code><a href="../../java/io/File.html" title="class in java.io">File</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/activation/FileDataSource.html#getFile--">getFile</a></span>()</code>
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              返回与此FileDataSource对应的File对象。 
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<td class="colFirst"><code><a href="../../java/io/InputStream.html" title="class in java.io">InputStream</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/activation/FileDataSource.html#getInputStream--">getInputStream</a></span>()</code>
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              此方法将返回一个表示数据的InputStream，如果不能执行此操作将抛出IOException。 
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<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="../../javax/activation/FileDataSource.html#getName--">getName</a></span>()</code>
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              返回此对象的 
             <i>名称</i> 。 
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<td class="colFirst"><code><a href="../../java/io/OutputStream.html" title="class in java.io">OutputStream</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/activation/FileDataSource.html#getOutputStream--">getOutputStream</a></span>()</code>
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              此方法将返回一个表示数据的OutputStream，如果不能执行此操作将抛出IOException。 
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/activation/FileDataSource.html#setFileTypeMap-javax.activation.FileTypeMap-">setFileTypeMap</a></span>(<a href="../../javax/activation/FileTypeMap.html" title="class in javax.activation">FileTypeMap</a> map)</code>
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              将FileTypeMap设置为与此FileDataSource一起使用 
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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>FileDataSource</h4> <pre>public FileDataSource(<a href="../../java/io/File.html" title="class in java.io">File</a> file)</pre>
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<span>从File对象创建FileDataSource。</span>
<span><i>注意：在调用需要打开文件的方法之前，文件将不会被打开。</i></span>
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<span class="paramLabel">参数</span>
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<code>file</code> - 文件 
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<li class="blockList"> <h4>FileDataSource</h4> <pre>public FileDataSource(<a href="../../java/lang/String.html" title="class in java.lang">String</a> name)</pre>
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<span>从指定的路径名创建一个FileDataSource。</span>
<span><i>注意：在调用需要打开文件的方法之前，文件将不会被打开。</i></span>
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<span class="paramLabel">参数</span>
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<code>name</code> - 与系统相关的文件名。 
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<li class="blockList"> <h4>getInputStream</h4> <pre>public <a href="../../java/io/InputStream.html" title="class in java.io">InputStream</a> getInputStream()
                           throws <a href="../../java/io/IOException.html" title="class in java.io">IOException</a></pre>
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<span>此方法将返回一个表示数据的InputStream，如果不能执行此操作将抛出IOException。</span>
<span>此方法将返回一个新的InputStream实例，每次调用。</span>
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<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
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<code><a href="../../javax/activation/DataSource.html#getInputStream--">getInputStream</a></code>在界面 
            <code><a href="../../javax/activation/DataSource.html" title="interface in javax.activation">DataSource</a></code>
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<span class="returnLabel">结果</span>
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             一个InputStream 
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<span class="throwsLabel">异常</span>
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<code><a href="../../java/io/IOException.html" title="class in java.io">IOException</a></code>
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<li class="blockList"> <h4>getOutputStream</h4> <pre>public <a href="../../java/io/OutputStream.html" title="class in java.io">OutputStream</a> getOutputStream()
                             throws <a href="../../java/io/IOException.html" title="class in java.io">IOException</a></pre>
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<span>此方法将返回一个表示数据的OutputStream，如果不能执行此操作将抛出IOException。</span>
<span>此方法将返回每个调用的OutputStream的新实例。</span>
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<span class="overrideSpecifyLabel">Specified by:</span>
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<code><a href="../../javax/activation/DataSource.html#getOutputStream--">getOutputStream</a></code>在接口 
            <code><a href="../../javax/activation/DataSource.html" title="interface in javax.activation">DataSource</a></code>
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<span class="returnLabel">结果</span>
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             一个OutputStream 
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<span class="throwsLabel">异常</span>
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<code><a href="../../java/io/IOException.html" title="class in java.io">IOException</a></code>
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<li class="blockList"> <h4>getContentType</h4> <pre>public <a href="../../java/lang/String.html" title="class in java.lang">String</a> getContentType()</pre>
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<span>此方法以字符串的形式返回数据的MIME类型。</span>
<span>此方法使用当前安装的FileTypeMap。</span>
<span>如果没有明确设置FileTypeMap，FileDataSource将在<code>getDefaultFileTypeMap</code>上调用<code>getDefaultFileTypeMap</code>方法来获取默认的FileTypeMap。</span>
<span><i>注意：默认情况下，使用的FileTypeMap将是MimetypesFileTypeMap。</i></span>
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<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../javax/activation/DataSource.html#getContentType--">getContentType</a></code>在接口 
            <code><a href="../../javax/activation/DataSource.html" title="interface in javax.activation">DataSource</a></code>
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<span class="returnLabel">结果</span>
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             MIME类型 
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<span class="seeLabel">另请参见：</span>
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<dd>
<a href="../../javax/activation/FileTypeMap.html#getDefaultFileTypeMap--"><code>FileTypeMap.getDefaultFileTypeMap()</code></a>
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<li class="blockList"> <h4>getName</h4> <pre>public <a href="../../java/lang/String.html" title="class in java.lang">String</a> getName()</pre>
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<span>返回此对象的<i>名称</i> 。</span>
<span>FileDataSource将返回对象的文件名。</span>
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<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../javax/activation/DataSource.html#getName--">getName</a></code>在界面 
            <code><a href="../../javax/activation/DataSource.html" title="interface in javax.activation">DataSource</a></code>
</dd>
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<span class="returnLabel">结果</span>
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<dd>
             对象的名称。 
           </dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<span><a href="../../javax/activation/DataSource.html" title="javax.activation中的接口"><code>DataSource</code></a></span>
</dd>
</dl> </li>
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<li class="blockList"> <h4>getFile</h4> <pre>public <a href="../../java/io/File.html" title="class in java.io">File</a> getFile()</pre>
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            返回与此FileDataSource对应的File对象。 
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<span class="returnLabel">结果</span>
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<dd>
             由该对象表示的文件的File对象。 
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<li class="blockList"> <h4>setFileTypeMap</h4> <pre>public void setFileTypeMap(<a href="../../javax/activation/FileTypeMap.html" title="class in javax.activation">FileTypeMap</a> map)</pre>
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            将FileTypeMap设置为与此FileDataSource一起使用 
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<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>map</code> - 此对象的FileTypeMap。 
           </dd>
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