<div class="htmledit\_views" id="content\_views"> <p>在项目开发过程中，因为重装系统，安装了Java10版本，发现sun.misc.Base64Encoder和sun.misc.Base64Decoder无法使用。</p><p><br></p><p><strong>原因：</strong></p><p>查看官网发现，JDK中的/lib/tool.jar和/lib/rt.jar已经从Java SE 9中删除，（我估计是因为java从sun换到oracle导致）。</p><p><br></p><p><strong>处理办法：</strong></p><p>直接用 java.util.Base64.Encoder 和 java.util.Base64.Decoder 替代使用。可以直接使用以下方法：</p><pre><code class="language-java hljs"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-keyword">import</span> java.util.Base64.Encoder</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-keyword">import</span> java.util.Base64.Decoder</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">Encoder encoder = Base64.getEncoder();</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">String result = encoder.encodeToString(byteArray);</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">Decoder decoder = Base64.getDecoder();</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-keyword">byte</span>\[\] result = decoder.decode(str);</div></div></li></ol></code><div class="hljs-button {2}" data-title="复制" onclick="hljs.copyCode(event)"></div></pre><br> </div> 原文地址：https://blog.csdn.net/xie\_sining/article/details/80777164