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<h2 title="类 RSA" class="title">类 RSA</h2>
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<li>java.lang.Object</li>
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<pre>public class <span class="typeNameLabel">RSA</span>
extends java.lang.Object</pre>
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<h3>字段概要</h3>
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<th class="colFirst" scope="col">限定符和类型</th>
<th class="colLast" scope="col">字段和说明</th>
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<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/alipay/sign/RSA.html#SIGN_ALGORITHMS">SIGN_ALGORITHMS</a></span></code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../com/alipay/sign/RSA.html#RSA--">RSA</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/alipay/sign/RSA.html#decrypt-java.lang.String-java.lang.String-java.lang.String-">decrypt</a></span>(java.lang.String&nbsp;content,
       java.lang.String&nbsp;private_key,
       java.lang.String&nbsp;input_charset)</code>
<div class="block">解密</div>
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<td class="colFirst"><code>static java.security.PrivateKey</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/alipay/sign/RSA.html#getPrivateKey-java.lang.String-">getPrivateKey</a></span>(java.lang.String&nbsp;key)</code>
<div class="block">得到私钥</div>
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<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/alipay/sign/RSA.html#sign-java.lang.String-java.lang.String-java.lang.String-">sign</a></span>(java.lang.String&nbsp;content,
    java.lang.String&nbsp;privateKey,
    java.lang.String&nbsp;input_charset)</code>
<div class="block">RSA签名</div>
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<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../com/alipay/sign/RSA.html#verify-java.lang.String-java.lang.String-java.lang.String-java.lang.String-">verify</a></span>(java.lang.String&nbsp;content,
      java.lang.String&nbsp;sign,
      java.lang.String&nbsp;ali_public_key,
      java.lang.String&nbsp;input_charset)</code>
<div class="block">RSA验签名检查</div>
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<code>equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>SIGN_ALGORITHMS</h4>
<pre>public static final&nbsp;java.lang.String SIGN_ALGORITHMS</pre>
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<dt><span class="seeLabel">另请参阅:</span></dt>
<dd><a href="../../../constant-values.html#com.alipay.sign.RSA.SIGN_ALGORITHMS">常量字段值</a></dd>
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<h4>RSA</h4>
<pre>public&nbsp;RSA()</pre>
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<h4>sign</h4>
<pre>public static&nbsp;java.lang.String&nbsp;sign(java.lang.String&nbsp;content,
                                    java.lang.String&nbsp;privateKey,
                                    java.lang.String&nbsp;input_charset)</pre>
<div class="block">RSA签名</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>content</code> - 待签名数据</dd>
<dd><code>privateKey</code> - 商户私钥</dd>
<dd><code>input_charset</code> - 编码格式</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>签名值</dd>
</dl>
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<h4>verify</h4>
<pre>public static&nbsp;boolean&nbsp;verify(java.lang.String&nbsp;content,
                             java.lang.String&nbsp;sign,
                             java.lang.String&nbsp;ali_public_key,
                             java.lang.String&nbsp;input_charset)</pre>
<div class="block">RSA验签名检查</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>content</code> - 待签名数据</dd>
<dd><code>sign</code> - 签名值</dd>
<dd><code>ali_public_key</code> - 支付宝公钥</dd>
<dd><code>input_charset</code> - 编码格式</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>布尔值</dd>
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<h4>decrypt</h4>
<pre>public static&nbsp;java.lang.String&nbsp;decrypt(java.lang.String&nbsp;content,
                                       java.lang.String&nbsp;private_key,
                                       java.lang.String&nbsp;input_charset)
                                throws java.lang.Exception</pre>
<div class="block">解密</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>content</code> - 密文</dd>
<dd><code>private_key</code> - 商户私钥</dd>
<dd><code>input_charset</code> - 编码格式</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>解密后的字符串</dd>
<dt><span class="throwsLabel">抛出:</span></dt>
<dd><code>java.lang.Exception</code></dd>
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<h4>getPrivateKey</h4>
<pre>public static&nbsp;java.security.PrivateKey&nbsp;getPrivateKey(java.lang.String&nbsp;key)
                                              throws java.lang.Exception</pre>
<div class="block">得到私钥</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>key</code> - 密钥字符串（经过base64编码）</dd>
<dt><span class="throwsLabel">抛出:</span></dt>
<dd><code>java.lang.Exception</code></dd>
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