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<div class="header">
<div class="subTitle">
compact3
</div>
<div class="subTitle">
javax.management.loading
</div>
<h2 class="title" title="Class MLet">Class MLet</h2>
</div><div class="contentContainer">
<ul class="inheritance">
<li><a href="../../../java/lang/Object.html" title="class in java.lang">java.lang.Object</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../java/lang/ClassLoader.html" title="class in java.lang">java.lang.ClassLoader</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../java/security/SecureClassLoader.html" title="class in java.security">java.security.SecureClassLoader</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../java/net/URLClassLoader.html" title="class in java.net">java.net.URLClassLoader</a></li>
<li>
<ul class="inheritance">
<li>javax.management.loading.MLet</li>
</ul> </li>
</ul> </li>
</ul> </li>
</ul> </li>
</ul>
<div class="description">
<ul class="blockList">
<li class="blockList">
<dl>
<dt>
All Implemented Interfaces:
</dt>
<dd>
<span><a href="../../../java/io/Closeable.html" title="java.io中的接口">Closeable</a> ， <a href="../../../java/io/Externalizable.html" title="java.io中的接口">Externalizable</a> ， <a href="../../../java/io/Serializable.html" title="java.io中的接口">Serializable</a> ， <a href="../../../java/lang/AutoCloseable.html" title="java.lang中的接口">AutoCloseable</a> ， <a href="../../../javax/management/loading/MLetMBean.html" title="javax.management.loading中的接口">MLetMBean</a> ， <a href="../../../javax/management/MBeanRegistration.html" title="javax.management中的接口">MBeanRegistration</a></span>
</dd>
</dl>
<dl>
<dt>
已知直接子类：
</dt>
<dd>
<span><a href="../../../javax/management/loading/PrivateMLet.html" title="javax.management.loading中的类">PrivateMLet</a></span>
</dd>
</dl>
<hr/> <br/> <pre>public class <span class="typeNameLabel">MLet</span>
extends <a href="../../../java/net/URLClassLoader.html" title="class in java.net">URLClassLoader</a>
implements <a href="../../../javax/management/loading/MLetMBean.html" title="interface in javax.management.loading">MLetMBean</a>, <a href="../../../javax/management/MBeanRegistration.html" title="interface in javax.management">MBeanRegistration</a>, <a href="../../../java/io/Externalizable.html" title="interface in java.io">Externalizable</a></pre>
<div class="block">
<span>允许您在来自远程URL的MBean服务器中实例化和注册一个或多个MBean。</span>
<span>M-let是管理小程序的捷径。</span>
<span>m-let服务通过加载m-let文本文件来实现，该文本文件指定要获取的MBean的信息。</span>
<span>每个MBean的信息在标签的单个实例中指定，称为MLET标记。</span>
<span>m-let文本文件的位置由URL指定。</span>
<p> <span><code>MLET</code>标记具有以下语法：</span> </p>
<p> <span>&lt; <code>MLET</code></span> <br/> <span><code>CODE =</code> <var>类</var> <code>| OBJECT =</code> <var>serfile</var></span> <br/> <span><code>ARCHIVE = "</code> <var>archiveList</var> <code>"</code></span> <br/> <span><code>[CODEBASE =</code> <var>codebaseURL</var> <code>]</code></span> <br/> <span><code>[NAME =</code> <var>mbeanname</var> <code>]</code></span> <br/> <span><code>[VERSION =</code> <var>版本</var> <code>]</code></span> <br/> <span>&gt;</span> <br/> <span><code>[</code> <var>arglist</var> <code>]</code></span> <br/> <span>&lt; <code>/MLET</code> &gt;</span> </p>
<p> <span>哪里：</span> </p>
<dl>
<dt>
<span><code>CODE =</code> <var>类</var></span>
</dt>
<dd>
<span>此属性指定要获取的MBean的完整Java类名称，包括包名称。</span>
<span>编译<code>.class</code>文件的MBean必须包含在一个<code>.jar</code>由指定的文件<code>ARCHIVE</code>属性。</span>
<span>必须存在<code>CODE</code>或<code>OBJECT</code> 。</span>
</dd>
<dt>
<span><code>OBJECT =</code> <var>serfile</var></span>
</dt>
<dd>
<span>该属性指定包含要获取的MBean的序列化表示的<code>.ser</code>文件。</span>
<span>此文件必须包含在一个<code>.jar</code>由指定的文件<code>ARCHIVE</code>属性。</span>
<span>如果<code>.jar</code>文件包含目录层次结构，请指定此层次结构中文件的路径。</span>
<span>否则将找不到匹配项。</span>
<span>必须存在<code>CODE</code>或<code>OBJECT</code> 。</span>
</dd>
<dt>
<span><code>ARCHIVE = "</code> <var>archiveList</var> <code>"</code></span>
</dt>
<dd>
<span>此强制属性指定一个或多个<code>.jar</code> MBean所使用的MBean或其他资源的<code>.jar</code>文件。</span>
<span><code>.jar</code>文件之一必须包含由<code>CODE</code>或<code>OBJECT</code>属性指定的文件。</span>
<span>如果存档列表包含多个文件：</span>
<ul>
<li> <span>每个文件必须与逗号（，）之后的文件分开。</span> </li>
<li> <span><var>存档列表</var>必须用双引号括起来。</span> </li>
</ul>
<span>所有<code>.jar</code>文件<var>archiveList</var>中必须存储在由代码库URL指定的目录。</span>
</dd>
<dt>
<span><code>CODEBASE =</code> <var>codebaseURL</var></span>
</dt>
<dd>
<span>此可选属性指定要获取的MBean的代码库URL。</span>
<span>它标识包含的目录<code>.jar</code>由指定的文件<code>ARCHIVE</code>属性。</span>
<span>仅当<code>.jar</code>文件与m-let文本文件不在同一目录中时才指定此属性。</span>
<span>如果未指定此属性，则使用m-let文本文件的基本URL。</span>
</dd>
<dt>
<span><code>NAME =</code> <var>mbeanname</var></span>
</dt>
<dd>
<span>此可选属性指定当m-let服务注册时要分配给MBean实例的对象名称。</span>
<span>如果<var>mbeanname</var>以冒号字符（:)开头，则对象名称的域部分是MBean服务器的默认域，由<a href="../../../javax/management/MBeanServer.html#getDefaultDomain--"><code>MBeanServer.getDefaultDomain()</code></a>返回。</span>
</dd>
<dt>
<span><code>VERSION =</code> <var>版本</var></span>
</dt>
<dd>
<span>此可选属性指定要获取的MBean和关联的<code>.jar</code>文件的版本号。</span>
<span>该版本号可用于指定从服务器加载<code>.jar</code>文件，以便在下次加载m-let文本文件时更新本地存储在缓存中的文件。</span>
<span><var>版本</var>必须是一系列非负十进制整数，每个十进制整数与之前的一个周期隔开。</span>
</dd>
<dt>
<span><var>arglist</var></span>
</dt>
<dd>
<span>此可选属性指定要实例化的MBean的一个或多个参数的列表。</span>
<span>此列表描述了要传递MBean构造函数的参数。</span>
<span>使用以下语法来指定<var>arglist中的</var>每个项目：</span>
<dl>
<dt>
<span>&lt; <code>ARG TYPE=</code> <var>argumentType</var> <code>VALUE=</code> <var>value</var> &gt;</span>
</dt>
<dd>
<span>哪里：</span>
<ul>
<li> <span><var>argumentType</var>是将作为参数传递给MBean构造函数的参数的类型。</span> </li>
</ul>
</dd>
</dl>
<p> <span>参数列表中的参数类型应为Java基本类型或Java基本类型（ <code>java.lang.Boolean, java.lang.Byte, java.lang.Short, java.lang.Long, java.lang.Integer, java.lang.Float, java.lang.Double, java.lang.String</code> ）。</span> </p>
</dd>
</dl>
<span>当加载m-let文本文件时，将创建并注册文件中指定的每个MBean的实例。</span>
<p> <span>m-let服务扩展了<code>java.net.URLClassLoader</code> ，可用于在代理的VM中加载远程类和jar文件。</span> </p>
<p> <span><strong>注 -</strong> <code>MLet</code>类加载器使用<a href="../../../javax/management/MBeanServerFactory.html#getClassLoaderRepository-javax.management.MBeanServer-"><code>MBeanServerFactory.getClassLoaderRepository(javax.management.MBeanServer)</code></a>加载在加载的jar文件中找不到的类。</span> </p>
</div>
<dl>
<dt>
<span class="simpleTagLabel">从以下版本开始：</span>
</dt>
<dd>
1.5
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../serialized-form.html#javax.management.loading.MLet">Serialized Form</a>
</dd>
</dl> </li>
</ul>
</div>
<div class="summary">
<ul class="blockList">
<li class="blockList">
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<ul class="blockList">
<li class="blockList"><a name="constructor.summary">
<!-- --> </a> <h3>构造方法摘要</h3>
<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Constructor Summary table, listing constructors, and an explanation">
<caption>
<span>构造方法</span>
<span class="tabEnd"> </span>
</caption>
<tbody>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#MLet--">MLet</a></span>()</code>
<div class="block">
使用默认委派父类ClassLoader构造新的MLet。
</div> </td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#MLet-java.net.URL:A-">MLet</a></span>(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls)</code>
<div class="block">
使用默认的委派父类ClassLoader构造指定URL的新MLet。
</div> </td>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#MLet-java.net.URL:A-boolean-">MLet</a></span>(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls, boolean delegateToCLR)</code>
<div class="block">
使用默认的委派父类ClassLoader构造指定URL的新MLet。
</div> </td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#MLet-java.net.URL:A-java.lang.ClassLoader-">MLet</a></span>(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls, <a href="../../../java/lang/ClassLoader.html" title="class in java.lang">ClassLoader</a> parent)</code>
<div class="block">
为给定的URL构造一个新的MLet。
</div> </td>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#MLet-java.net.URL:A-java.lang.ClassLoader-boolean-">MLet</a></span>(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls, <a href="../../../java/lang/ClassLoader.html" title="class in java.lang">ClassLoader</a> parent, boolean delegateToCLR)</code>
<div class="block">
为给定的URL构造一个新的MLet。
</div> </td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#MLet-java.net.URL:A-java.lang.ClassLoader-java.net.URLStreamHandlerFactory-">MLet</a></span>(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls, <a href="../../../java/lang/ClassLoader.html" title="class in java.lang">ClassLoader</a> parent, <a href="../../../java/net/URLStreamHandlerFactory.html" title="interface in java.net">URLStreamHandlerFactory</a> factory)</code>
<div class="block">
为指定的URL，父类加载器和URLStreamHandlerFactory构造一个新的MLet。
</div> </td>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#MLet-java.net.URL:A-java.lang.ClassLoader-java.net.URLStreamHandlerFactory-boolean-">MLet</a></span>(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls, <a href="../../../java/lang/ClassLoader.html" title="class in java.lang">ClassLoader</a> parent, <a href="../../../java/net/URLStreamHandlerFactory.html" title="interface in java.net">URLStreamHandlerFactory</a> factory, boolean delegateToCLR)</code>
<div class="block">
为指定的URL，父类加载器和URLStreamHandlerFactory构造一个新的MLet。
</div> </td>
</tr>
</tbody>
</table> </li>
</ul>
<!-- ========== METHOD SUMMARY =========== -->
<ul class="blockList">
<li class="blockList"><a name="method.summary">
<!-- --> </a> <h3>方法摘要</h3>
<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Method Summary table, listing methods, and an explanation">
<caption>
<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>
</caption>
<tbody>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor" id="i0">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#addURL-java.lang.String-">addURL</a></span>(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> url)</code>
<div class="block">
将指定的URL附加到URL列表中以搜索类和资源。
</div> </td>
</tr>
<tr class="rowColor" id="i1">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#addURL-java.net.URL-">addURL</a></span>(<a href="../../../java/net/URL.html" title="class in java.net">URL</a> url)</code>
<div class="block">
将指定的URL附加到URL列表中以搜索类和资源。
</div> </td>
</tr>
<tr class="altColor" id="i2">
<td class="colFirst"><code>protected <a href="../../../java/net/URL.html" title="class in java.net">URL</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#check-java.lang.String-java.net.URL-java.lang.String-javax.management.loading.MLetContent-">check</a></span>(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> version, <a href="../../../java/net/URL.html" title="class in java.net">URL</a> codebase, <a href="../../../java/lang/String.html" title="class in java.lang">String</a> jarfile, <a href="../../../javax/management/loading/MLetContent.html" title="class in javax.management.loading">MLetContent</a> mlet)</code>
<div class="block">
当扩展此服务以支持缓存和版本控制时，该方法将被覆盖。
</div> </td>
</tr>
<tr class="rowColor" id="i3">
<td class="colFirst"><code>protected <a href="../../../java/lang/Class.html" title="class in java.lang">类</a>&lt;?&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#findClass-java.lang.String-">findClass</a></span>(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> name)</code>
<div class="block">
这是正在重新定义的类加载器的主要方法。
</div> </td>
</tr>
<tr class="altColor" id="i4">
<td class="colFirst"><code>protected <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/management/loading/MLet.html#findLibrary-java.lang.String-">findLibrary</a></span>(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> libname)</code>
<div class="block">
返回本机库的绝对路径名。
</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="../../../javax/management/loading/MLet.html#getLibraryDirectory--">getLibraryDirectory</a></span>()</code>
<div class="block">
获取库加载器用于存储本机库的当前目录，然后再将其加载到内存中。
</div> </td>
</tr>
<tr class="altColor" id="i6">
<td class="colFirst"><code><a href="../../../java/util/Set.html" title="interface in java.util">Set</a>&lt;<a href="../../../java/lang/Object.html" title="class in java.lang">Object</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#getMBeansFromURL-java.lang.String-">getMBeansFromURL</a></span>(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> url)</code>
<div class="block">
加载一个包含定义要添加到MBean服务器的MBean的MLET标签的文本文件。
</div> </td>
</tr>
<tr class="rowColor" id="i7">
<td class="colFirst"><code><a href="../../../java/util/Set.html" title="interface in java.util">Set</a>&lt;<a href="../../../java/lang/Object.html" title="class in java.lang">Object</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#getMBeansFromURL-java.net.URL-">getMBeansFromURL</a></span>(<a href="../../../java/net/URL.html" title="class in java.net">URL</a> url)</code>
<div class="block">
加载一个包含定义要添加到MBean服务器的MBean的MLET标签的文本文件。
</div> </td>
</tr>
<tr class="altColor" id="i8">
<td class="colFirst"><code><a href="../../../java/net/URL.html" title="class in java.net">URL</a>[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#getURLs--">getURLs</a></span>()</code>
<div class="block">
返回加载类和资源的URL的搜索路径。
</div> </td>
</tr>
<tr class="rowColor" id="i9">
<td class="colFirst"><code><a href="../../../java/lang/Class.html" title="class in java.lang">类</a>&lt;?&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#loadClass-java.lang.String-javax.management.loading.ClassLoaderRepository-">loadClass</a></span>(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> name, <a href="../../../javax/management/loading/ClassLoaderRepository.html" title="interface in javax.management.loading">ClassLoaderRepository</a> clr)</code>
<div class="block">
<span>加载一个类，使用给定的<a href="../../../javax/management/loading/ClassLoaderRepository.html" title="javax.management.loading中的接口"><code>ClassLoaderRepository</code></a>如果该类没有在这个MLet的URL中找到。</span>
</div> </td>
</tr>
<tr class="altColor" id="i10">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#postDeregister--">postDeregister</a></span>()</code>
<div class="block">
允许m-let在MBean服务器中取消注册后执行所需的操作。
</div> </td>
</tr>
<tr class="rowColor" id="i11">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#postRegister-java.lang.Boolean-">postRegister</a></span>(<a href="../../../java/lang/Boolean.html" title="class in java.lang">Boolean</a> registrationDone)</code>
<div class="block">
允许m-let在MBean服务器中注册或注册失败后执行所需的操作。
</div> </td>
</tr>
<tr class="altColor" id="i12">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#preDeregister--">preDeregister</a></span>()</code>
<div class="block">
允许m-let在MBean服务器取消注册之前执行所需的任何操作。
</div> </td>
</tr>
<tr class="rowColor" id="i13">
<td class="colFirst"><code><a href="../../../javax/management/ObjectName.html" title="class in javax.management">ObjectName</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#preRegister-javax.management.MBeanServer-javax.management.ObjectName-">preRegister</a></span>(<a href="../../../javax/management/MBeanServer.html" title="interface in javax.management">MBeanServer</a> server, <a href="../../../javax/management/ObjectName.html" title="class in javax.management">ObjectName</a> name)</code>
<div class="block">
允许m-let在MBean服务器注册之前执行所需的任何操作。
</div> </td>
</tr>
<tr class="altColor" id="i14">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#readExternal-java.io.ObjectInput-">readExternal</a></span>(<a href="../../../java/io/ObjectInput.html" title="interface in java.io">ObjectInput</a> in)</code>
<div class="block">
<span>从给定的<a href="../../../java/io/ObjectInput.html" title="java.io中的接口"><code>ObjectInput</code></a>恢复这个MLet的内容。</span>
</div> </td>
</tr>
<tr class="rowColor" id="i15">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#setLibraryDirectory-java.lang.String-">setLibraryDirectory</a></span>(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> libdir)</code>
<div class="block">
设置用于存储本机库的库加载器使用的目录，然后将其加载到内存中。
</div> </td>
</tr>
<tr class="altColor" id="i16">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/management/loading/MLet.html#writeExternal-java.io.ObjectOutput-">writeExternal</a></span>(<a href="../../../java/io/ObjectOutput.html" title="interface in java.io">ObjectOutput</a> out)</code>
<div class="block">
<span>将此MLet的内容保存到给定的<a href="../../../java/io/ObjectOutput.html" title="java.io中的接口"><code>ObjectOutput</code></a> 。</span>
</div> </td>
</tr>
</tbody>
</table>
<ul class="blockList">
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<!-- --> </a> <h3>Methods inherited from interface javax.management.loading.<a href="../../../javax/management/loading/MLetMBean.html" title="interface in javax.management.loading">MLetMBean</a></h3> <code><a href="../../../javax/management/loading/MLetMBean.html#getResource-java.lang.String-">getResource</a>, <a href="../../../javax/management/loading/MLetMBean.html#getResourceAsStream-java.lang.String-">getResourceAsStream</a>, <a href="../../../javax/management/loading/MLetMBean.html#getResources-java.lang.String-">getResources</a></code></li>
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</ul>
</div>
<div class="details">
<ul class="blockList">
<li class="blockList">
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<ul class="blockList">
<li class="blockList"><a name="constructor.detail">
<!-- --> </a> <h3>构造方法详细信息</h3> <a name="MLet--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>MLet</h4> <pre>public MLet()</pre>
<div class="block">
使用默认委派父类ClassLoader构造新的MLet。
</div> </li>
</ul> <a name="MLet-java.net.URL:A-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>MLet</h4> <pre>public MLet(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls)</pre>
<div class="block">
<span>使用默认的委派父类ClassLoader构造指定URL的新MLet。</span>
<span>在首次搜索父类加载器后，将按照为类和资源指定的顺序搜索URL。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>urls</code> - 加载类和资源的URL。
</dd>
</dl> </li>
</ul> <a name="MLet-java.net.URL:A-java.lang.ClassLoader-">
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<ul class="blockList">
<li class="blockList"> <h4>MLet</h4> <pre>public MLet(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls,
<a href="../../../java/lang/ClassLoader.html" title="class in java.lang">ClassLoader</a> parent)</pre>
<div class="block">
<span>为给定的URL构造一个新的MLet。</span>
<span>在首次搜索指定的父类加载器后，将按照为类和资源指定的顺序搜索URL。</span>
<span>父参数将被用作委托的父类加载器。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>urls</code> - 加载类和资源的URL。
</dd>
<dd>
<code>parent</code> - 用于委派的父类加载器。
</dd>
</dl> </li>
</ul> <a name="MLet-java.net.URL:A-java.lang.ClassLoader-java.net.URLStreamHandlerFactory-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>MLet</h4> <pre>public MLet(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls,
<a href="../../../java/lang/ClassLoader.html" title="class in java.lang">ClassLoader</a> parent,
<a href="../../../java/net/URLStreamHandlerFactory.html" title="interface in java.net">URLStreamHandlerFactory</a> factory)</pre>
<div class="block">
<span>为指定的URL，父类加载器和URLStreamHandlerFactory构造一个新的MLet。</span>
<span>父参数将被用作委托的父类加载器。</span>
<span>工厂参数将用作流处理程序工厂，以在创建新URL时获取协议处理程序。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>urls</code> - 加载类和资源的URL。
</dd>
<dd>
<code>parent</code> - 用于委派的父类加载器。
</dd>
<dd>
<code>factory</code> - 创建URL时要使用的URLStreamHandlerFactory。
</dd>
</dl> </li>
</ul> <a name="MLet-java.net.URL:A-boolean-">
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<ul class="blockList">
<li class="blockList"> <h4>MLet</h4> <pre>public MLet(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls,
boolean delegateToCLR)</pre>
<div class="block">
<span>使用默认的委派父类ClassLoader构造指定URL的新MLet。</span>
<span>在首次搜索父类加载器后，将按照为类和资源指定的顺序搜索URL。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>urls</code> - 加载类和资源的URL。
</dd>
<dd>
<span><code>delegateToCLR</code> - 如果在父类ClassLoader或URL中找不到类的话，则MLet应该委托给其包含的<a href="../../../javax/management/loading/ClassLoaderRepository.html" title="javax.management.loading中的接口">MBeanServer <code>ClassLoaderRepository</code></a> 。</span>
</dd>
</dl> </li>
</ul> <a name="MLet-java.net.URL:A-java.lang.ClassLoader-boolean-">
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<ul class="blockList">
<li class="blockList"> <h4>MLet</h4> <pre>public MLet(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls,
<a href="../../../java/lang/ClassLoader.html" title="class in java.lang">ClassLoader</a> parent,
boolean delegateToCLR)</pre>
<div class="block">
<span>为给定的URL构造一个新的MLet。</span>
<span>在首次搜索指定的父类加载器后，将按照为类和资源指定的顺序搜索URL。</span>
<span>父参数将被用作委托的父类加载器。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>urls</code> - 加载类和资源的URL。
</dd>
<dd>
<code>parent</code> - 用于委派的父类加载器。
</dd>
<dd>
<span><code>delegateToCLR</code> - 如果在父类ClassLoader或URL中找不到类时，则MLet应委托其包含的<a href="../../../javax/management/loading/ClassLoaderRepository.html" title="javax.management.loading中的接口">MBeanServer <code>ClassLoaderRepository</code></a> 。</span>
</dd>
</dl> </li>
</ul> <a name="MLet-java.net.URL:A-java.lang.ClassLoader-java.net.URLStreamHandlerFactory-boolean-">
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<ul class="blockListLast">
<li class="blockList"> <h4>MLet</h4> <pre>public MLet(<a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] urls,
<a href="../../../java/lang/ClassLoader.html" title="class in java.lang">ClassLoader</a> parent,
<a href="../../../java/net/URLStreamHandlerFactory.html" title="interface in java.net">URLStreamHandlerFactory</a> factory,
boolean delegateToCLR)</pre>
<div class="block">
<span>为指定的URL，父类加载器和URLStreamHandlerFactory构造一个新的MLet。</span>
<span>父参数将被用作委托的父类加载器。</span>
<span>工厂参数将用作流处理程序工厂，以在创建新URL时获取协议处理程序。</span>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>urls</code> - 加载类和资源的URL。
</dd>
<dd>
<code>parent</code> - 用于委派的父类加载器。
</dd>
<dd>
<code>factory</code> - 创建URL时要使用的URLStreamHandlerFactory。
</dd>
<dd>
<span><code>delegateToCLR</code> - 如果在父类ClassLoader或URL中找不到类时，则MLet应委托其包含的<a href="../../../javax/management/loading/ClassLoaderRepository.html" title="javax.management.loading中的接口">MBeanServer <code>ClassLoaderRepository</code></a> 。</span>
</dd>
</dl> </li>
</ul> </li>
</ul>
<!-- ============ METHOD DETAIL ========== -->
<ul class="blockList">
<li class="blockList"><a name="method.detail">
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<ul class="blockList">
<li class="blockList"> <h4>addURL</h4> <pre>public void addURL(<a href="../../../java/net/URL.html" title="class in java.net">URL</a> url)</pre>
<div class="block">
将指定的URL附加到URL列表中以搜索类和资源。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/loading/MLetMBean.html#addURL-java.net.URL-">addURL</a></code>在界面
<code><a href="../../../javax/management/loading/MLetMBean.html" title="interface in javax.management.loading">MLetMBean</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../java/net/URLClassLoader.html#addURL-java.net.URL-">addURL</a></code>在
<code><a href="../../../java/net/URLClassLoader.html" title="class in java.net">URLClassLoader</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>url</code> - 要添加到URL搜索路径的URL
</dd>
</dl> </li>
</ul> <a name="addURL-java.lang.String-">
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<ul class="blockList">
<li class="blockList"> <h4>addURL</h4> <pre>public void addURL(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> url)
throws <a href="../../../javax/management/ServiceNotFoundException.html" title="class in javax.management">ServiceNotFoundException</a></pre>
<div class="block">
将指定的URL附加到URL列表中以搜索类和资源。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/loading/MLetMBean.html#addURL-java.lang.String-">addURL</a></code>中的
<code><a href="../../../javax/management/loading/MLetMBean.html" title="interface in javax.management.loading">MLetMBean</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>url</code> - 要添加的URL。
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../javax/management/ServiceNotFoundException.html" title="class in javax.management">ServiceNotFoundException</a></code> - 指定的网址格式错误。
</dd>
</dl> </li>
</ul> <a name="getURLs--">
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<ul class="blockList">
<li class="blockList"> <h4>getURLs</h4> <pre>public <a href="../../../java/net/URL.html" title="class in java.net">URL</a>[] getURLs()</pre>
<div class="block">
<span>返回加载类和资源的URL的搜索路径。</span>
<span>这包括为构造函数指定的URL的原始列表，以及随后由addURL（）方法附加的任何URL。</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/loading/MLetMBean.html#getURLs--">getURLs</a></code>在接口
<code><a href="../../../javax/management/loading/MLetMBean.html" title="interface in javax.management.loading">MLetMBean</a></code>
</dd>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../java/net/URLClassLoader.html#getURLs--">getURLs</a></code>在类别
<code><a href="../../../java/net/URLClassLoader.html" title="class in java.net">URLClassLoader</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
用于加载类和资源的URL的搜索路径。
</dd>
</dl> </li>
</ul> <a name="getMBeansFromURL-java.net.URL-">
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<ul class="blockList">
<li class="blockList"> <h4>getMBeansFromURL</h4> <pre>public <a href="../../../java/util/Set.html" title="interface in java.util">Set</a>&lt;<a href="../../../java/lang/Object.html" title="class in java.lang">Object</a>&gt; getMBeansFromURL(<a href="../../../java/net/URL.html" title="class in java.net">URL</a> url)
throws <a href="../../../javax/management/ServiceNotFoundException.html" title="class in javax.management">ServiceNotFoundException</a></pre>
<div class="block">
<span>加载一个包含定义要添加到MBean服务器的MBean的MLET标签的文本文件。</span>
<span>文本文件的位置由URL指定。</span>
<span>在MLET文件中指定的MBean将被实例化并注册到MBean服务器中。</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/loading/MLetMBean.html#getMBeansFromURL-java.net.URL-">getMBeansFromURL</a></code>在界面
<code><a href="../../../javax/management/loading/MLetMBean.html" title="interface in javax.management.loading">MLetMBean</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>url</code> - 要作为URL对象加载的文本文件的URL。
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<span>一个包含m-let文本文件中每个MLET标签一个条目的集合。</span>
<span>如果无法创建MBean，则每个条目都指定创建的MBean的ObjectInstance或抛出的对象（即错误或异常）。</span>
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../javax/management/ServiceNotFoundException.html" title="class in javax.management">ServiceNotFoundException</a></code> - 发生以下错误之一：m-let文本文件不包含MLET标记，未找到m-let文本文件，未指定MLET标记的强制属性，url的值为null 。
</dd>
<dd>
<code><a href="../../../java/lang/IllegalStateException.html" title="class in java.lang">IllegalStateException</a></code> - MLet MBean未注册到MBeanServer。
</dd>
</dl> </li>
</ul> <a name="getMBeansFromURL-java.lang.String-">
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<ul class="blockList">
<li class="blockList"> <h4>getMBeansFromURL</h4> <pre>public <a href="../../../java/util/Set.html" title="interface in java.util">Set</a>&lt;<a href="../../../java/lang/Object.html" title="class in java.lang">Object</a>&gt; getMBeansFromURL(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> url)
throws <a href="../../../javax/management/ServiceNotFoundException.html" title="class in javax.management">ServiceNotFoundException</a></pre>
<div class="block">
<span>加载一个包含定义要添加到MBean服务器的MBean的MLET标签的文本文件。</span>
<span>文本文件的位置由URL指定。</span>
<span>在MLET文件中指定的MBean将被实例化并注册到MBean服务器中。</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/loading/MLetMBean.html#getMBeansFromURL-java.lang.String-">getMBeansFromURL</a></code>在界面
<code><a href="../../../javax/management/loading/MLetMBean.html" title="interface in javax.management.loading">MLetMBean</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>url</code> - 要作为String对象加载的文本文件的URL。
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<span>一个包含m-let文本文件中每个MLET标签一个条目的集合。</span>
<span>如果无法创建MBean，则每个条目都指定创建的MBean的ObjectInstance或抛出的对象（即错误或异常）。</span>
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../javax/management/ServiceNotFoundException.html" title="class in javax.management">ServiceNotFoundException</a></code> - 发生以下错误之一：m-let文本文件不包含MLET标记，未找到m-let文本文件，未指定MLET标记的强制属性，URL格式错误。
</dd>
<dd>
<code><a href="../../../java/lang/IllegalStateException.html" title="class in java.lang">IllegalStateException</a></code> - MLet MBean未向MBeanServer注册。
</dd>
</dl> </li>
</ul> <a name="getLibraryDirectory--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>getLibraryDirectory</h4> <pre>public <a href="../../../java/lang/String.html" title="class in java.lang">String</a> getLibraryDirectory()</pre>
<div class="block">
获取库加载器用于存储本机库的当前目录，然后再将其加载到内存中。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/loading/MLetMBean.html#getLibraryDirectory--">getLibraryDirectory</a></code>在界面
<code><a href="../../../javax/management/loading/MLetMBean.html" title="interface in javax.management.loading">MLetMBean</a></code>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
库加载器使用的当前目录。
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/lang/UnsupportedOperationException.html" title="class in java.lang">UnsupportedOperationException</a></code> - 如果此实现不支持以这种方式存储本机库。
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../javax/management/loading/MLet.html#setLibraryDirectory-java.lang.String-"><code>setLibraryDirectory(java.lang.String)</code></a>
</dd>
</dl> </li>
</ul> <a name="setLibraryDirectory-java.lang.String-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>setLibraryDirectory</h4> <pre>public void setLibraryDirectory(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> libdir)</pre>
<div class="block">
设置用于存储本机库的库加载器使用的目录，然后将其加载到内存中。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/loading/MLetMBean.html#setLibraryDirectory-java.lang.String-">setLibraryDirectory</a></code>在界面
<code><a href="../../../javax/management/loading/MLetMBean.html" title="interface in javax.management.loading">MLetMBean</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>libdir</code> - 库加载器使用的目录。
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/lang/UnsupportedOperationException.html" title="class in java.lang">UnsupportedOperationException</a></code> - 如果此实现不支持以这种方式存储本机库。
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../javax/management/loading/MLet.html#getLibraryDirectory--"><code>getLibraryDirectory()</code></a>
</dd>
</dl> </li>
</ul> <a name="preRegister-javax.management.MBeanServer-javax.management.ObjectName-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>preRegister</h4> <pre>public <a href="../../../javax/management/ObjectName.html" title="class in javax.management">ObjectName</a> preRegister(<a href="../../../javax/management/MBeanServer.html" title="interface in javax.management">MBeanServer</a> server,
<a href="../../../javax/management/ObjectName.html" title="class in javax.management">ObjectName</a> name)
throws <a href="../../../java/lang/Exception.html" title="class in java.lang">异常</a></pre>
<div class="block">
<span>允许m-let在MBean服务器注册之前执行所需的任何操作。</span>
<span>如果ObjectName为空，则m-let为其注册&lt;defaultDomain&gt;提供默认名称：type = MLet</span>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/MBeanRegistration.html#preRegister-javax.management.MBeanServer-javax.management.ObjectName-">preRegister</a></code>在界面
<code><a href="../../../javax/management/MBeanRegistration.html" title="interface in javax.management">MBeanRegistration</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>server</code> - 将在其中注册m-let的MBean服务器。
</dd>
<dd>
<code>name</code> - m-let的对象名。
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
m-let注册的名称。
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/lang/Exception.html" title="class in java.lang">异常</a></code> - MBean服务器应该捕获此异常，并重新抛出MBeanRegistrationException异常。
</dd>
</dl> </li>
</ul> <a name="postRegister-java.lang.Boolean-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>postRegister</h4> <pre>public void postRegister(<a href="../../../java/lang/Boolean.html" title="class in java.lang">Boolean</a> registrationDone)</pre>
<div class="block">
允许m-let在MBean服务器中注册或注册失败后执行所需的操作。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/MBeanRegistration.html#postRegister-java.lang.Boolean-">postRegister</a></code>在接口
<code><a href="../../../javax/management/MBeanRegistration.html" title="interface in javax.management">MBeanRegistration</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<span><code>registrationDone</code> - 指示m-let是否已在MBean服务器中成功注册。</span>
<span>值false表示注册阶段失败。</span>
</dd>
</dl> </li>
</ul> <a name="preDeregister--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>preDeregister</h4> <pre>public void preDeregister()
throws <a href="../../../java/lang/Exception.html" title="class in java.lang">异常</a></pre>
<div class="block">
允许m-let在MBean服务器取消注册之前执行所需的任何操作。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/MBeanRegistration.html#preDeregister--">preDeregister</a></code>在界面
<code><a href="../../../javax/management/MBeanRegistration.html" title="interface in javax.management">MBeanRegistration</a></code>
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/lang/Exception.html" title="class in java.lang">异常</a></code> - 这个异常应该被MBean服务器捕获，并重新抛出为MBeanRegistrationException。
</dd>
</dl> </li>
</ul> <a name="postDeregister--">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>postDeregister</h4> <pre>public void postDeregister()</pre>
<div class="block">
允许m-let在MBean服务器中取消注册后执行所需的操作。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../javax/management/MBeanRegistration.html#postDeregister--">postDeregister</a></code>在界面
<code><a href="../../../javax/management/MBeanRegistration.html" title="interface in javax.management">MBeanRegistration</a></code>
</dd>
</dl> </li>
</ul> <a name="writeExternal-java.io.ObjectOutput-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>writeExternal</h4> <pre>public void writeExternal(<a href="../../../java/io/ObjectOutput.html" title="interface in java.io">ObjectOutput</a> out)
throws <a href="../../../java/io/IOException.html" title="class in java.io">IOException</a>,
<a href="../../../java/lang/UnsupportedOperationException.html" title="class in java.lang">UnsupportedOperationException</a></pre>
<div class="block">
<p> <span>将此MLet的内容保存到给定的<a href="../../../java/io/ObjectOutput.html" title="java.io中的接口"><code>ObjectOutput</code></a> 。</span> <span>并不是所有的实现都支持这种方法。</span> <span>那些不抛出<a href="../../../java/lang/UnsupportedOperationException.html" title="java.lang中的类"><code>UnsupportedOperationException</code></a> 。</span> <span>子类可以覆盖此方法来支持它或更改写入的数据的格式。</span> </p>
<p> <span>写入数据的格式没有指定，但是如果一个实现支持<a href="../../../javax/management/loading/MLet.html#writeExternal-java.io.ObjectOutput-"><code>writeExternal(java.io.ObjectOutput)</code>，</a>那么它也必须支持<a href="../../../javax/management/loading/MLet.html#readExternal-java.io.ObjectInput-"><code>readExternal(java.io.ObjectInput)</code></a> ，这样一来，后者可以读取由前者写的内容。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../java/io/Externalizable.html#writeExternal-java.io.ObjectOutput-">writeExternal</a></code>在接口
<code><a href="../../../java/io/Externalizable.html" title="interface in java.io">Externalizable</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>out</code> - 要写入的对象输出流。
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果在写作时出现问题。
</dd>
<dd>
<code><a href="../../../java/lang/UnsupportedOperationException.html" title="class in java.lang">UnsupportedOperationException</a></code> - 如果此实现不支持此操作。
</dd>
</dl> </li>
</ul> <a name="readExternal-java.io.ObjectInput-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>readExternal</h4> <pre>public void readExternal(<a href="../../../java/io/ObjectInput.html" title="interface in java.io">ObjectInput</a> in)
throws <a href="../../../java/io/IOException.html" title="class in java.io">IOException</a>,
<a href="../../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a>,
<a href="../../../java/lang/UnsupportedOperationException.html" title="class in java.lang">UnsupportedOperationException</a></pre>
<div class="block">
<p> <span>从给定的<a href="../../../java/io/ObjectInput.html" title="java.io中的接口"><code>ObjectInput</code></a>恢复这个MLet的内容。</span> <span>并不是所有的实现都支持这种方法。</span> <span>那些没有抛出<a href="../../../java/lang/UnsupportedOperationException.html" title="java.lang中的类"><code>UnsupportedOperationException</code></a> 。</span> <span>子类可以覆盖此方法来支持它或更改读取数据的格式。</span> </p>
<p> <span>未指定读取数据的格式，但是如果一个实现支持<a href="../../../javax/management/loading/MLet.html#readExternal-java.io.ObjectInput-"><code>readExternal(java.io.ObjectInput)</code>，</a>那么它也必须支持<a href="../../../javax/management/loading/MLet.html#writeExternal-java.io.ObjectOutput-"><code>writeExternal(java.io.ObjectOutput)</code></a> ，以便后者可以读取后者的内容。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">Specified by:</span>
</dt>
<dd>
<code><a href="../../../java/io/Externalizable.html#readExternal-java.io.ObjectInput-">readExternal</a></code>在接口
<code><a href="../../../java/io/Externalizable.html" title="interface in java.io">Externalizable</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>in</code> - 要读取的对象输入流。
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果阅读时出现问题。
</dd>
<dd>
<code><a href="../../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a></code> - 如果找不到正在恢复的对象的类。
</dd>
<dd>
<code><a href="../../../java/lang/UnsupportedOperationException.html" title="class in java.lang">UnsupportedOperationException</a></code> - 如果此实现不支持此操作。
</dd>
</dl> </li>
</ul> <a name="loadClass-java.lang.String-javax.management.loading.ClassLoaderRepository-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>loadClass</h4> <pre>public <a href="../../../java/lang/Class.html" title="class in java.lang">类</a>&lt;?&gt; loadClass(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> name,
<a href="../../../javax/management/loading/ClassLoaderRepository.html" title="interface in javax.management.loading">ClassLoaderRepository</a> clr)
throws <a href="../../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a></pre>
<div class="block">
<p> <span>加载一个类，使用给定的<a href="../../../javax/management/loading/ClassLoaderRepository.html" title="javax.management.loading中的接口"><code>ClassLoaderRepository</code></a>如果该类没有在这个MLet的URL中找到。</span> <span>给定的ClassLoaderRepository可以为null，在这种情况下，如果在该MLet的URL中找不到该类，则会立即发生一个<a href="../../../java/lang/ClassNotFoundException.html" title="java.lang中的类"><code>ClassNotFoundException</code></a> 。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>name</code> - 我们要加载的类的名称。
</dd>
<dd>
<span><code>clr</code> - 将用于搜索给定类的ClassLoaderRepository，如果在此ClassLoader中未找到该类。</span>
<span>可能为null。</span>
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
生成的Class对象。
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a></code> - 在此ClassLoader或给定的ClassLoaderRepository中找不到指定的类。
</dd>
</dl> </li>
</ul> <a name="findClass-java.lang.String-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>findClass</h4> <pre>protected <a href="../../../java/lang/Class.html" title="class in java.lang">类</a>&lt;?&gt; findClass(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> name)
throws <a href="../../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a></pre>
<div class="block">
这是正在重新定义的类加载器的主要方法。
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../java/net/URLClassLoader.html#findClass-java.lang.String-">findClass</a></code>在
<code><a href="../../../java/net/URLClassLoader.html" title="class in java.net">URLClassLoader</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>name</code> - 类的名称。
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
生成的Class对象。
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<code><a href="../../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a></code> - 找不到指定的类。
</dd>
</dl> </li>
</ul> <a name="findLibrary-java.lang.String-">
<!-- --> </a>
<ul class="blockList">
<li class="blockList"> <h4>findLibrary</h4> <pre>protected <a href="../../../java/lang/String.html" title="class in java.lang">String</a> findLibrary(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> libname)</pre>
<div class="block">
<span>返回本机库的绝对路径名。</span>
<span>VM调用此方法来查找属于此类加载器加载的类的本机库。</span>
<span>在JAR文件中搜索库，首先使用本机库名称，如果没有找到本机库名称以及特定于体系结构的路径名（ <code>OSName/OSArch/OSVersion/lib/nativelibname</code> ），即</span>
<p> <span>将在JAR文件中搜索Solaris SPARC 5.7上的库统计信息：</span> </p>
<ol>
<li> <span>libstat.so</span> </li>
<li> <span>SunOS / sparc / 5.7 / lib / libstat.so</span> </li>
</ol>
<span>将在JAR文件中搜索Windows NT 4.0上的库统计信息：</span>
<ol>
<li> <span>stat.dll</span> </li>
<li> <span>WindowsNT / x86 / 4.0 / lib / stat.dll</span> </li>
</ol>
<p> <span>更具体地说，让<em><code>nativelibname</code></em>是<a href="../../../java/lang/System.html#mapLibraryName-java.lang.String-"><code>System.mapLibraryName</code></a> <code>(libname)</code>的结果。</span> <span>然后按照以下顺序在JAR文件中搜索以下名称：</span> <br/> <em><code>nativelibname</code></em> <br/> <span><code>&lt;os.name&gt;/&lt;os.arch&gt;/&lt;os.version&gt;/lib/</code> <em><code>nativelibname</code></em></span> <br/> <span>其中<code>&lt;X&gt;</code>装置<code>System.getProperty(X)</code>与结果除去任何空格，和<code>/</code>代表文件分隔符（ <a href="../../../java/io/File.html#separator"><code>File.separator</code></a> ）。</span> </p>
<p> <span>如果此方法返回<code>null</code> ，即在加载此类加载器的任何JAR文件中找不到库，VM将沿着指定为<code>java.library.path</code>属性的路径搜索库。</span> </p>
</div>
<dl>
<dt>
<span class="overrideSpecifyLabel">重写：</span>
</dt>
<dd>
<code><a href="../../../java/lang/ClassLoader.html#findLibrary-java.lang.String-">findLibrary</a></code>在
<code><a href="../../../java/lang/ClassLoader.html" title="class in java.lang">ClassLoader</a></code>
</dd>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>libname</code> - 图书馆名称。
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
本土图书馆的绝对路径。
</dd>
<dt>
<span class="seeLabel">另请参见：</span>
</dt>
<dd>
<a href="../../../java/lang/System.html#loadLibrary-java.lang.String-"><code>System.loadLibrary(String)</code></a> ，
<a href="../../../java/lang/System.html#mapLibraryName-java.lang.String-"><code>System.mapLibraryName(String)</code></a>
</dd>
</dl> </li>
</ul> <a name="check-java.lang.String-java.net.URL-java.lang.String-javax.management.loading.MLetContent-">
<!-- --> </a>
<ul class="blockListLast">
<li class="blockList"> <h4>check</h4> <pre>protected <a href="../../../java/net/URL.html" title="class in java.net">URL</a> check(<a href="../../../java/lang/String.html" title="class in java.lang">String</a> version,
<a href="../../../java/net/URL.html" title="class in java.net">URL</a> codebase,
<a href="../../../java/lang/String.html" title="class in java.lang">String</a> jarfile,
<a href="../../../javax/management/loading/MLetContent.html" title="class in javax.management.loading">MLetContent</a> mlet)
throws <a href="../../../java/lang/Exception.html" title="class in java.lang">异常</a></pre>
<div class="block">
<p> <span>当扩展此服务以支持缓存和版本控制时，该方法将被覆盖。</span> <span>当从MLet文件中提取版本，代码库和jarfile时，它被从<a href="../../../javax/management/loading/MLet.html#getMBeansFromURL-java.net.URL-"><code>getMBeansFromURL</code></a>调用，可用于验证是否正确加载给定的MBean，或者用不同的替换来替换给定的URL。</span> </p>
<p> <span>此方法的默认实现返回<code>codebase</code>不变。</span> </p>
</div>
<dl>
<dt>
<span class="paramLabel">参数</span>
</dt>
<dd>
<code>version</code> - 本地存储的
<code>.jar</code>文件的版本号。
</dd>
<dd>
<code>codebase</code> - 远程
<code>.jar</code>文件的基址。
</dd>
<dd>
<code>jarfile</code> - 要加载的
<code>.jar</code>文件的名称。
</dd>
<dd>
<code>mlet</code> - 表示
<code>MLET</code>标签的
<code>MLetContent</code>实例。
</dd>
<dt>
<span class="returnLabel">结果</span>
</dt>
<dd>
<span>用于加载MBean的代码库。</span>
<span>返回值不能为空。</span>
</dd>
<dt>
<span class="throwsLabel">异常</span>
</dt>
<dd>
<span><code><a href="../../../java/lang/Exception.html" title="class in java.lang">异常</a></code> - 如果由于某种原因MBean不被加载</span>
<span>该异常将被添加到<a href="../../../javax/management/loading/MLet.html#getMBeansFromURL-java.net.URL-"><code>getMBeansFromURL</code></a>返回的<a href="../../../javax/management/loading/MLet.html#getMBeansFromURL-java.net.URL-">集合中</a> 。</span>
</dd>
</dl> </li>
</ul> </li>
</ul> </li>
</ul>
</div>
</div>
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