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104 lines
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javax.crypto
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<h2 class="title" title="Class NullCipher">Class NullCipher</h2>
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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><a href="../../javax/crypto/Cipher.html" title="class in javax.crypto">javax.crypto.Cipher</a></li>
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<li>
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<ul class="inheritance">
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<li>javax.crypto.NullCipher</li>
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<hr/> <br/> <pre>public class <span class="typeNameLabel">NullCipher</span>
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extends <a href="../../javax/crypto/Cipher.html" title="class in javax.crypto">Cipher</a></pre>
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<div class="block">
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<span>NullCipher类是提供“身份密码”的类，不会转换纯文本。</span>
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<span>因此，密文与明文相同。</span>
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<span>所有初始化方法都不执行，而blockize设置为1个字节。</span>
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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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<!-- =========== FIELD SUMMARY =========== -->
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<!-- --> </a> <h3>Field Summary</h3>
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<li class="blockList"><a name="fields.inherited.from.class.javax.crypto.Cipher">
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<!-- --> </a> <h3>Fields inherited from class javax.crypto.<a href="../../javax/crypto/Cipher.html" title="class in javax.crypto">Cipher</a></h3> <code><a href="../../javax/crypto/Cipher.html#DECRYPT_MODE">DECRYPT_MODE</a>, <a href="../../javax/crypto/Cipher.html#ENCRYPT_MODE">ENCRYPT_MODE</a>, <a href="../../javax/crypto/Cipher.html#PRIVATE_KEY">PRIVATE_KEY</a>, <a href="../../javax/crypto/Cipher.html#PUBLIC_KEY">PUBLIC_KEY</a>, <a href="../../javax/crypto/Cipher.html#SECRET_KEY">SECRET_KEY</a>, <a href="../../javax/crypto/Cipher.html#UNWRAP_MODE">UNWRAP_MODE</a>, <a href="../../javax/crypto/Cipher.html#WRAP_MODE">WRAP_MODE</a></code></li>
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<!-- ======== 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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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/crypto/NullCipher.html#NullCipher--">NullCipher</a></span>()</code>
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创建一个NullCipher对象。
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</tr>
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<!-- ========== METHOD SUMMARY =========== -->
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<!-- --> </a> <h3>方法摘要</h3>
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<li class="blockList"><a name="methods.inherited.from.class.javax.crypto.Cipher">
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<!-- --> </a> <h3>Methods inherited from class javax.crypto.<a href="../../javax/crypto/Cipher.html" title="class in javax.crypto">Cipher</a></h3> <code><a href="../../javax/crypto/Cipher.html#doFinal--">doFinal</a>, <a href="../../javax/crypto/Cipher.html#doFinal-byte:A-">doFinal</a>, <a href="../../javax/crypto/Cipher.html#doFinal-byte:A-int-">doFinal</a>, <a href="../../javax/crypto/Cipher.html#doFinal-byte:A-int-int-">doFinal</a>, <a href="../../javax/crypto/Cipher.html#doFinal-byte:A-int-int-byte:A-">doFinal</a>, <a href="../../javax/crypto/Cipher.html#doFinal-byte:A-int-int-byte:A-int-">doFinal</a>, <a href="../../javax/crypto/Cipher.html#doFinal-java.nio.ByteBuffer-java.nio.ByteBuffer-">doFinal</a>, <a href="../../javax/crypto/Cipher.html#getAlgorithm--">getAlgorithm</a>, <a href="../../javax/crypto/Cipher.html#getBlockSize--">getBlockSize</a>, <a href="../../javax/crypto/Cipher.html#getExemptionMechanism--">getExemptionMechanism</a>, <a href="../../javax/crypto/Cipher.html#getInstance-java.lang.String-">getInstance</a>, <a href="../../javax/crypto/Cipher.html#getInstance-java.lang.String-java.security.Provider-">getInstance</a>, <a href="../../javax/crypto/Cipher.html#getInstance-java.lang.String-java.lang.String-">getInstance</a>, <a href="../../javax/crypto/Cipher.html#getIV--">getIV</a>, <a href="../../javax/crypto/Cipher.html#getMaxAllowedKeyLength-java.lang.String-">getMaxAllowedKeyLength</a>, <a href="../../javax/crypto/Cipher.html#getMaxAllowedParameterSpec-java.lang.String-">getMaxAllowedParameterSpec</a>, <a href="../../javax/crypto/Cipher.html#getOutputSize-int-">getOutputSize</a>, <a href="../../javax/crypto/Cipher.html#getParameters--">getParameters</a>, <a href="../../javax/crypto/Cipher.html#getProvider--">getProvider</a>, <a href="../../javax/crypto/Cipher.html#init-int-java.security.cert.Certificate-">init</a>, <a href="../../javax/crypto/Cipher.html#init-int-java.security.cert.Certificate-java.security.SecureRandom-">init</a>, <a href="../../javax/crypto/Cipher.html#init-int-java.security.Key-">init</a>, <a href="../../javax/crypto/Cipher.html#init-int-java.security.Key-java.security.AlgorithmParameters-">init</a>, <a href="../../javax/crypto/Cipher.html#init-int-java.security.Key-java.security.spec.AlgorithmParameterSpec-">init</a>, <a href="../../javax/crypto/Cipher.html#init-int-java.security.Key-java.security.spec.AlgorithmParameterSpec-java.security.SecureRandom-">init</a>, <a href="../../javax/crypto/Cipher.html#init-int-java.security.Key-java.security.AlgorithmParameters-java.security.SecureRandom-">init</a>, <a href="../../javax/crypto/Cipher.html#init-int-java.security.Key-java.security.SecureRandom-">init</a>, <a href="../../javax/crypto/Cipher.html#unwrap-byte:A-java.lang.String-int-">unwrap</a>, <a href="../../javax/crypto/Cipher.html#update-byte:A-">update</a>, <a href="../../javax/crypto/Cipher.html#update-byte:A-int-int-">update</a>, <a href="../../javax/crypto/Cipher.html#update-byte:A-int-int-byte:A-">update</a>, <a href="../../javax/crypto/Cipher.html#update-byte:A-int-int-byte:A-int-">update</a>, <a href="../../javax/crypto/Cipher.html#update-java.nio.ByteBuffer-java.nio.ByteBuffer-">update</a>, <a href="../../javax/crypto/Cipher.html#updateAAD-byte:A-">updateAAD</a>, <a href="../../javax/crypto/Cipher.html#updateAAD-byte:A-int-int-">updateAAD</a>, <a href="../../javax/crypto/Cipher.html#updateAAD-java.nio.ByteBuffer-">updateAAD</a>, <a href="../../javax/crypto/Cipher.html#wrap-java.security.Key-">wrap</a></code></li>
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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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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<!-- --> </a> <h3>构造方法详细信息</h3> <a name="NullCipher--">
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<li class="blockList"> <h4>NullCipher</h4> <pre>public NullCipher()</pre>
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<div class="block">
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创建一个NullCipher对象。
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