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411 lines
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411 lines
22 KiB
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<div class="header">
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<div class="subTitle">
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javax.crypto
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</div>
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<h2 class="title" title="Class SealedObject">Class SealedObject</h2>
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</div><div class="contentContainer">
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<ul class="inheritance">
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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>
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<ul class="inheritance">
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<li>javax.crypto.SealedObject</li>
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</ul> </li>
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</ul>
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<div class="description">
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<ul class="blockList">
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<li class="blockList">
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<dl>
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<dt>
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All Implemented Interfaces:
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</dt>
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<dd>
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<span><a href="../../java/io/Serializable.html" title="java.io中的接口">Serializable</a></span>
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</dd>
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</dl>
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<hr/> <br/> <pre>public class <span class="typeNameLabel">SealedObject</span>
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extends <a href="../../java/lang/Object.html" title="class in java.lang">Object</a>
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implements <a href="../../java/io/Serializable.html" title="interface in java.io">Serializable</a></pre>
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<div class="block">
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<span>该类使程序员能够使用加密算法创建对象并保护其机密性。</span>
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<p> <span>给定任何可序列化对象，可以创建一个SealedObject，以序列化格式（即“深度拷贝”）封装原始对象，并使用DES等加密算法对其序列化内容进行封装（加密），以保护其机密性。</span> <span>加密的内容可以随后被解密（使用相应的算法使用正确的解密密钥）并解串行化，产生原始对象。</span> </p>
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<p> <span>请注意，在应用于SealedObject之前，必须使用正确的算法，密钥，填充方案等将密码对象完全初始化。</span> </p>
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<p> <span>密封的原始物体可以通过两种不同的方法进行回收：</span> </p>
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<ul>
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<li> <span>通过使用<code>Cipher</code>对象的<a href="../../javax/crypto/SealedObject.html#getObject-javax.crypto.Cipher-"><code>getObject</code></a>方法。</span> <p> <span>该方法需要完全初始化<code>Cipher</code>对象，用与<code>Cipher</code>对象相同的算法，密钥，填充方案等进行初始化。</span> </p><p> <span>这种方法的优点在于，开封密封对象的一方不需要知道解密密钥。</span> <span>例如，在一方已经用所需的解密密钥初始化密码对象之后，它可以将密码对象交给另一方，然后该密码对象就开封密封对象。</span> </p></li>
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<li> <span>通过使用<code>Key</code>对象的<a href="../../javax/crypto/SealedObject.html#getObject-java.security.Key-"><code>getObject</code></a>方法之一。</span> <p> <span>在这种方法中， <code>getObject</code>方法为<code>getObject</code>算法创建一个密码对象，并使用给定的解密密钥和存储在密封对象中的算法参数（如果有的话）进行初始化。</span> </p><p> <span>这种方法的优点在于，开封对象的方不需要跟踪用于密封对象的参数（例如，IV）。</span> </p></li>
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</ul>
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</div>
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<dl>
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<dt>
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<span class="simpleTagLabel">从以下版本开始：</span>
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</dt>
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<dd>
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1.4
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</dd>
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<dt>
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<span class="seeLabel">另请参见：</span>
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</dt>
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<dd>
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<span><a href="../../javax/crypto/Cipher.html" title="javax.crypto中的类"><code>Cipher</code></a> ， <a href="../../serialized-form.html#javax.crypto.SealedObject">Serialized Form</a></span>
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</dd>
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</dl> </li>
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</ul>
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</div>
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<div class="summary">
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<!-- =========== FIELD SUMMARY =========== -->
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<ul class="blockList">
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<li class="blockList"><a name="field.summary">
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<!-- --> </a> <h3>Field Summary</h3>
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<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Field Summary table, listing fields, and an explanation">
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<caption>
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<span>Fields</span>
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<span class="tabEnd"> </span>
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</caption>
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<tbody>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Field and Description</th>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>protected byte[]</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/SealedObject.html#encodedParams">encodedParams</a></span></code>
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<div class="block">
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密码密码使用的密码参数，以默认格式编码。
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</div> </td>
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</tr>
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</tbody>
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</table> </li>
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</ul>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<ul class="blockList">
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<li class="blockList"><a name="constructor.summary">
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<!-- --> </a> <h3>构造方法摘要</h3>
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<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Constructor Summary table, listing constructors, and an explanation">
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<caption>
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<span>构造方法</span>
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<span class="tabEnd"> </span>
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</caption>
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<tbody>
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<tr>
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<th class="colFirst" scope="col">Modifier</th>
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<th class="colLast" scope="col">Constructor and Description</th>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>protected </code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/SealedObject.html#SealedObject-javax.crypto.SealedObject-">SealedObject</a></span>(<a href="../../javax/crypto/SealedObject.html" title="class in javax.crypto">SealedObject</a> so)</code>
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<div class="block">
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从传入的SealedObject构造一个SealedObject对象。
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</div> </td>
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</tr>
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<tr class="rowColor">
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<td class="colFirst"><code> </code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/SealedObject.html#SealedObject-java.io.Serializable-javax.crypto.Cipher-">SealedObject</a></span>(<a href="../../java/io/Serializable.html" title="interface in java.io">Serializable</a> object, <a href="../../javax/crypto/Cipher.html" title="class in javax.crypto">Cipher</a> c)</code>
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<div class="block">
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从任何可序列化对象构造一个SealedObject。
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</div> </td>
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</tr>
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</tbody>
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</table> </li>
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</ul>
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<!-- ========== METHOD SUMMARY =========== -->
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<ul class="blockList">
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<li class="blockList"><a name="method.summary">
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<!-- --> </a> <h3>方法摘要</h3>
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<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Method Summary table, listing methods, and an explanation">
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<caption>
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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="t2"><span><a href="javascript:show(2);">接口方法</a></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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</caption>
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<tbody>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Method and Description</th>
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</tr>
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<tr class="altColor" id="i0">
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<td class="colFirst"><code><a href="../../java/lang/String.html" title="class in java.lang">String</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/SealedObject.html#getAlgorithm--">getAlgorithm</a></span>()</code>
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<div class="block">
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返回用于密封此对象的算法。
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</div> </td>
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</tr>
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<tr class="rowColor" id="i1">
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<td class="colFirst"><code><a href="../../java/lang/Object.html" title="class in java.lang">Object</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/SealedObject.html#getObject-javax.crypto.Cipher-">getObject</a></span>(<a href="../../javax/crypto/Cipher.html" title="class in javax.crypto">Cipher</a> c)</code>
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<div class="block">
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检索原始（封装）对象。
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</div> </td>
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</tr>
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<tr class="altColor" id="i2">
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<td class="colFirst"><code><a href="../../java/lang/Object.html" title="class in java.lang">Object</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/SealedObject.html#getObject-java.security.Key-">getObject</a></span>(<a href="../../java/security/Key.html" title="interface in java.security">Key</a> key)</code>
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<div class="block">
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检索原始（封装）对象。
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</div> </td>
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</tr>
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<tr class="rowColor" id="i3">
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<td class="colFirst"><code><a href="../../java/lang/Object.html" title="class in java.lang">Object</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/SealedObject.html#getObject-java.security.Key-java.lang.String-">getObject</a></span>(<a href="../../java/security/Key.html" title="interface in java.security">Key</a> key, <a href="../../java/lang/String.html" title="class in java.lang">String</a> provider)</code>
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<div class="block">
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检索原始（封装）对象。
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</div> </td>
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</tr>
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</tbody>
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</table>
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<ul class="blockList">
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<li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
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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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</ul> </li>
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</ul> </li>
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</ul>
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</div>
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<div class="details">
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<ul class="blockList">
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<li class="blockList">
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<!-- ============ FIELD DETAIL =========== -->
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<ul class="blockList">
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<li class="blockList"><a name="field.detail">
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<!-- --> </a> <h3>字段详细信息</h3> <a name="encodedParams">
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<!-- --> </a>
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<ul class="blockListLast">
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<li class="blockList"> <h4>encodedParams</h4> <pre>protected byte[] encodedParams</pre>
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<div class="block">
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<span>密码密码使用的密码参数，以默认格式编码。</span>
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<p> <span>也就是<code>cipher.getParameters().getEncoded()</code> 。</span> </p>
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</div> </li>
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</ul> </li>
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</ul>
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<ul class="blockList">
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<li class="blockList"><a name="constructor.detail">
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<!-- --> </a> <h3>构造方法详细信息</h3> <a name="SealedObject-java.io.Serializable-javax.crypto.Cipher-">
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<!-- --> </a>
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<ul class="blockList">
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<li class="blockList"> <h4>SealedObject</h4> <pre>public SealedObject(<a href="../../java/io/Serializable.html" title="interface in java.io">Serializable</a> object,
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<a href="../../javax/crypto/Cipher.html" title="class in javax.crypto">Cipher</a> c)
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throws <a href="../../java/io/IOException.html" title="class in java.io">IOException</a>,
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<a href="../../javax/crypto/IllegalBlockSizeException.html" title="class in javax.crypto">IllegalBlockSizeException</a></pre>
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<div class="block">
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<span>从任何可序列化对象构造一个SealedObject。</span>
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<p> <span>给定的对象被序列化，并且其序列化内容使用给定的密码进行加密，该密码必须被完全初始化。</span> </p>
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<p> <span>可能在加密操作中使用的任何算法参数都存储在新的<code>SealedObject</code> 。</span> </p>
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</div>
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<dl>
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<dt>
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<span class="paramLabel">参数</span>
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</dt>
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<dd>
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<span><code>object</code> - 要密封的物体;</span>
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<span>可以为空。</span>
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</dd>
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<dd>
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<code>c</code> - 用于密封对象的密码。
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</dd>
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<dt>
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<span class="throwsLabel">异常</span>
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</dt>
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<dd>
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<code><a href="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果给定的密码为空。
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</dd>
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<dd>
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<code><a href="../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果在序列化期间发生错误
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</dd>
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<dd>
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<code><a href="../../javax/crypto/IllegalBlockSizeException.html" title="class in javax.crypto">IllegalBlockSizeException</a></code> - 如果给定的密码是块密码，则不会请求填充，并且总输入长度（即，序列化对象内容的长度）不是密码块大小的倍数
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</dd>
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</dl> </li>
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</ul> <a name="SealedObject-javax.crypto.SealedObject-">
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<ul class="blockListLast">
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<li class="blockList"> <h4>SealedObject</h4> <pre>protected SealedObject(<a href="../../javax/crypto/SealedObject.html" title="class in javax.crypto">SealedObject</a> so)</pre>
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<div class="block">
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从传入的SealedObject构造一个SealedObject对象。
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</div>
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<dl>
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<dt>
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<span class="paramLabel">参数</span>
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</dt>
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<dd>
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<code>so</code> - 一个SealedObject对象
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</dd>
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<dt>
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<span class="throwsLabel">异常</span>
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</dt>
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<dd>
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<code><a href="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果给定的密封对象为空。
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</dd>
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</dl> </li>
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</ul> </li>
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</ul>
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<!-- ============ METHOD DETAIL ========== -->
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<ul class="blockList">
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<li class="blockList"><a name="method.detail">
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<!-- --> </a> <h3>方法详细信息</h3> <a name="getAlgorithm--">
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<ul class="blockList">
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<li class="blockList"> <h4>getAlgorithm</h4> <pre>public final <a href="../../java/lang/String.html" title="class in java.lang">String</a> getAlgorithm()</pre>
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<div class="block">
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返回用于密封此对象的算法。
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</div>
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<dl>
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<dt>
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<span class="returnLabel">结果</span>
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</dt>
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<dd>
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用于密封该对象的算法。
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</dd>
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</dl> </li>
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</ul> <a name="getObject-java.security.Key-">
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<!-- --> </a>
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<ul class="blockList">
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<li class="blockList"> <h4>getObject</h4> <pre>public final <a href="../../java/lang/Object.html" title="class in java.lang">Object</a> getObject(<a href="../../java/security/Key.html" title="interface in java.security">Key</a> key)
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throws <a href="../../java/io/IOException.html" title="class in java.io">IOException</a>,
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<a href="../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a>,
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<a href="../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a>,
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<a href="../../java/security/InvalidKeyException.html" title="class in java.security">InvalidKeyException</a></pre>
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<div class="block">
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<span>检索原始（封装）对象。</span>
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<p> <span>该方法为密封操作中使用的算法创建一个密码。</span> <span>如果默认提供程序包提供了该算法的实现，则使用包含该实现的Cipher的实例。</span> <span>如果算法在默认包中不可用，则会搜索其他包。</span> <span>使用给定的<code>key</code>和密封操作中使用的参数（如果有），将密码对象初始化以进行解密。</span> </p>
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<p> <span>封装的对象在被返回之前是未密封的并被解除序列化的。</span> </p>
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</div>
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<dl>
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<dt>
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<span class="paramLabel">参数</span>
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</dt>
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<dd>
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<code>key</code> - 用于开封对象的键。
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</dd>
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<dt>
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<span class="returnLabel">结果</span>
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</dt>
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<dd>
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原来的对象。
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</dd>
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<dt>
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<span class="throwsLabel">异常</span>
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</dt>
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<dd>
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<code><a href="../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果在排序期间发生错误。
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</dd>
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<dd>
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<code><a href="../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a></code> - 如果在排序期间发生错误。
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</dd>
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<dd>
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<code><a href="../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></code> - 如果解封对象的算法不可用。
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</dd>
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<dd>
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<code><a href="../../java/security/InvalidKeyException.html" title="class in java.security">InvalidKeyException</a></code> - 如果给定的键不能用于解封对象（例如，它有错误的算法）。
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</dd>
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<dd>
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<code><a href="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果
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<code>key</code>为空。
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</dd>
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</dl> </li>
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</ul> <a name="getObject-javax.crypto.Cipher-">
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<!-- --> </a>
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<ul class="blockList">
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<li class="blockList"> <h4>getObject</h4> <pre>public final <a href="../../java/lang/Object.html" title="class in java.lang">Object</a> getObject(<a href="../../javax/crypto/Cipher.html" title="class in javax.crypto">Cipher</a> c)
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throws <a href="../../java/io/IOException.html" title="class in java.io">IOException</a>,
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<a href="../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a>,
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<a href="../../javax/crypto/IllegalBlockSizeException.html" title="class in javax.crypto">IllegalBlockSizeException</a>,
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<a href="../../javax/crypto/BadPaddingException.html" title="class in javax.crypto">BadPaddingException</a></pre>
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<div class="block">
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<span>检索原始（封装）对象。</span>
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<p> <span>封装的对象是未密封的（使用给定的Cipher，假设密码已被正确初始化）并被取消序列化，然后返回。</span> </p>
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="paramLabel">参数</span>
|
||
</dt>
|
||
<dd>
|
||
<code>c</code> - 用于解密对象的密码
|
||
</dd>
|
||
<dt>
|
||
<span class="returnLabel">结果</span>
|
||
</dt>
|
||
<dd>
|
||
原来的对象。
|
||
</dd>
|
||
<dt>
|
||
<span class="throwsLabel">异常</span>
|
||
</dt>
|
||
<dd>
|
||
<code><a href="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果给定的密码为空。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果在排序期间发生错误
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a></code> - 如果在排序期间发生错误
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../javax/crypto/IllegalBlockSizeException.html" title="class in javax.crypto">IllegalBlockSizeException</a></code> - 如果给定的密码是块密码，则不会请求填充，总输入长度不是密码块大小的倍数
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../javax/crypto/BadPaddingException.html" title="class in javax.crypto">BadPaddingException</a></code> - 如果给定的密码已被初始化用于解密，并且已经指定了填充，但是输入数据没有适当的预期填充字节
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> <a name="getObject-java.security.Key-java.lang.String-">
|
||
<!-- --> </a>
|
||
<ul class="blockListLast">
|
||
<li class="blockList"> <h4>getObject</h4> <pre>public final <a href="../../java/lang/Object.html" title="class in java.lang">Object</a> getObject(<a href="../../java/security/Key.html" title="interface in java.security">Key</a> key,
|
||
<a href="../../java/lang/String.html" title="class in java.lang">String</a> provider)
|
||
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/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a>,
|
||
<a href="../../java/security/NoSuchProviderException.html" title="class in java.security">NoSuchProviderException</a>,
|
||
<a href="../../java/security/InvalidKeyException.html" title="class in java.security">InvalidKeyException</a></pre>
|
||
<div class="block">
|
||
<span>检索原始（封装）对象。</span>
|
||
<p> <span>该方法为密封操作中使用的算法创建一个密码，使用从给定的provider中的该算法的<code>provider</code> 。</span> <span>使用给定的<code>key</code>和密封操作中使用的参数（如果有），将密码对象初始化以进行解密。</span> </p>
|
||
<p> <span>封装的对象在被返回之前是未密封的并被解除序列化的。</span> </p>
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="paramLabel">参数</span>
|
||
</dt>
|
||
<dd>
|
||
<code>key</code> - 用于打开对象的密钥。
|
||
</dd>
|
||
<dd>
|
||
<code>provider</code> - 打开对象的算法提供者的名称。
|
||
</dd>
|
||
<dt>
|
||
<span class="returnLabel">结果</span>
|
||
</dt>
|
||
<dd>
|
||
原来的对象。
|
||
</dd>
|
||
<dt>
|
||
<span class="throwsLabel">异常</span>
|
||
</dt>
|
||
<dd>
|
||
<code><a href="../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 如果给定的提供者为空或为空。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/io/IOException.html" title="class in java.io">IOException</a></code> - 如果在排序期间发生错误。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/lang/ClassNotFoundException.html" title="class in java.lang">ClassNotFoundException</a></code> - 如果在排序期间发生错误。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></code> - 如果解封对象的算法不可用。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/security/NoSuchProviderException.html" title="class in java.security">NoSuchProviderException</a></code> - 如果给定的提供程序未配置。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/security/InvalidKeyException.html" title="class in java.security">InvalidKeyException</a></code> - 如果给定的键不能用于解封对象（例如，它有错误的算法）。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果
|
||
<code>key</code>为空。
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> </li>
|
||
</ul> </li>
|
||
</ul>
|
||
</div>
|
||
</div> |