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<div class="section" id="getstatic">
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<h1>getstatic<a class="headerlink" href="#getstatic" title="永久链接至标题">¶</a></h1>
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<ul class="simple">
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<li><p>推荐直接使用<a class="reference internal" href="ognl.html"><span class="doc">ognl</span></a>命令，更加灵活。</p></li>
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</ul>
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<p>通过getstatic命令可以方便的查看类的静态属性。使用方法为<code class="docutils literal notranslate"><span class="pre">getstatic</span> <span class="pre">class_name</span> <span class="pre">field_name</span></code></p>
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<div class="highlight-bash notranslate"><div class="highlight hljs"><pre class="bash">$ getstatic demo.MathGame random
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field: random
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@Random[
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serialVersionUID=@Long[3905348978240129619],
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seed=@AtomicLong[120955813885284],
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multiplier=@Long[25214903917],
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addend=@Long[11],
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mask=@Long[281474976710655],
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DOUBLE_UNIT=@Double[1.1102230246251565E-16],
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BadBound=@String[bound must be positive],
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BadRange=@String[bound must be greater than origin],
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BadSize=@String[size must be non-negative],
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seedUniquifier=@AtomicLong[-3282039941672302964],
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nextNextGaussian=@Double[0.0],
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haveNextNextGaussian=@Boolean[false],
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serialPersistentFields=@ObjectStreamField[][isEmpty=false;size=3],
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unsafe=@Unsafe[sun.misc.Unsafe@2eaa1027],
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seedOffset=@Long[24],
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]</pre></div>
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</div>
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<p>如果该静态属性是一个复杂对象，还可以支持在该属性上通过ognl表示进行遍历，过滤，访问对象的内部属性等操作。</p>
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<ul class="simple">
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<li><p>OGNL特殊用法请参考：<a class="reference external" href="https://github.com/alibaba/arthas/issues/71">https://github.com/alibaba/arthas/issues/71</a></p></li>
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<li><p>OGNL表达式官方指南：<a class="reference external" href="https://commons.apache.org/proper/commons-ognl/language-guide.html">https://commons.apache.org/proper/commons-ognl/language-guide.html</a></p></li>
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</ul>
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<p>例如，假设n是一个Map，Map的Key是一个Enum，我们想过滤出Map中Key为某个Enum的值，可以写如下命令</p>
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<div class="highlight-default notranslate"><pre class="literal-block">$ getstatic com.alibaba.arthas.Test n 'entrySet().iterator.{? #this.key.name()=="STOP"}'
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field: n
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@ArrayList[
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@Node[STOP=bbb],
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]
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Affect(row-cnt:1) cost in 68 ms.
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$ getstatic com.alibaba.arthas.Test m 'entrySet().iterator.{? #this.key=="a"}'
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field: m
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@ArrayList[
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@Node[a=aaa],
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]</pre>
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