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aria-label="批处理功能"><!--[--><!--]--> 批处理功能 <!--[--><!--]--></a><!----></li><li><p tabindex="0" class="sidebar-item">ognl 表达式用法 <!----></p><ul style="display:none;" class="sidebar-item-children"><!--[--><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/issues/11" rel="noopener noreferrer" target="_blank" aria-label="活用ognl表达式"><!--[--><!--]--><span>活用ognl表达式</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span><!--[--><!--]--></a><!----></li><li><a class="external-link sidebar-item" 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points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span><!--[--><!--]--></a><!----></li><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/releases" rel="noopener noreferrer" target="_blank" aria-label="Release Notes"><!--[--><!--]--><span>Release Notes</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span><!--[--><!--]--></a><!----></li><li><a href="/doc/contact-us.md" class="sidebar-item" aria-label="QQ群/钉钉群"><!--[--><!--]--> QQ群/钉钉群 <!--[--><!--]--></a><!----></li><!--]--></ul></li><!--]--></ul><!--[--><!--]--></aside><!--]--><!--[--><main class="page" data-v-e0e60120><!--[--><!--]--><div class="theme-default-content" data-v-e0e60120><!--[--><!--]--><!----><div data-v-e0e60120><h1 id="logger" tabindex="-1"><a class="header-anchor" href="#logger" aria-hidden="true">#</a> logger</h1><p><a href="https://arthas.aliyun.com/doc/arthas-tutorials?language=cn&amp;id=command-logger" target="_blank" rel="noopener noreferrer"><code>logger</code>在线教程<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span></a></p><div class="custom-container tip"><p class="custom-container-title">提示</p><p>查看 logger 信息，更新 logger level</p></div><h3 id="使用参考" tabindex="-1"><a class="header-anchor" href="#使用参考" aria-hidden="true">#</a> 使用参考</h3><h4 id="查看所有-logger-信息" tabindex="-1"><a class="header-anchor" href="#查看所有-logger-信息" aria-hidden="true">#</a> 查看所有 logger 信息</h4><p>以下面的<code>logback.xml</code>为例：</p><div class="language-xml ext-xml line-numbers-mode"><pre class="language-xml"><code><span class="token prolog">&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;</span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>configuration</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>appender</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>APPLICATION<span class="token punctuation">&quot;</span></span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>ch.qos.logback.core.rolling.RollingFileAppender<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>file</span><span class="token punctuation">&gt;</span></span>app.log<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>file</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>rollingPolicy</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>fileNamePattern</span><span class="token punctuation">&gt;</span></span>mylog-%d{yyyy-MM-dd}.%i.txt<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>fileNamePattern</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>maxFileSize</span><span class="token punctuation">&gt;</span></span>100MB<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>maxFileSize</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>maxHistory</span><span class="token punctuation">&gt;</span></span>60<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>maxHistory</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>totalSizeCap</span><span class="token punctuation">&gt;</span></span>2GB<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>totalSizeCap</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>rollingPolicy</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>encoder</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>pattern</span><span class="token punctuation">&gt;</span></span>%logger{35} - %msg%n<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>pattern</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>encoder</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>appender</span><span class="token punctuation">&gt;</span></span>

    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>appender</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>ASYNC<span class="token punctuation">&quot;</span></span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>ch.qos.logback.classic.AsyncAppender<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>appender-ref</span> <span class="token attr-name">ref</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>APPLICATION<span class="token punctuation">&quot;</span></span> <span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>appender</span><span class="token punctuation">&gt;</span></span>

    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>appender</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>CONSOLE<span class="token punctuation">&quot;</span></span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>ch.qos.logback.core.ConsoleAppender<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>encoder</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>pattern</span><span class="token punctuation">&gt;</span></span>%-4relative [%thread] %-5level %logger{35} - %msg %n
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>pattern</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>charset</span><span class="token punctuation">&gt;</span></span>utf8<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>charset</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>encoder</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>appender</span><span class="token punctuation">&gt;</span></span>

    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>root</span> <span class="token attr-name">level</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>INFO<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>appender-ref</span> <span class="token attr-name">ref</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>CONSOLE<span class="token punctuation">&quot;</span></span> <span class="token punctuation">/&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>appender-ref</span> <span class="token attr-name">ref</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>ASYNC<span class="token punctuation">&quot;</span></span> <span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>root</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>configuration</span><span class="token punctuation">&gt;</span></span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>使用<code>logger</code>命令打印的结果是：</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token punctuation">[</span>arthas@2062<span class="token punctuation">]</span>$ logger
 name                                   ROOT
 class                                  ch.qos.logback.classic.Logger
 classLoader                            sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
 classLoaderHash                        2a139a55
 level                                  INFO
 effectiveLevel                         INFO
 additivity                             <span class="token boolean">true</span>
 codeSource                             file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
 appenders                              name            CONSOLE
                                        class           ch.qos.logback.core.ConsoleAppender
                                        classLoader     sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
                                        classLoaderHash 2a139a55
                                        target          System.out
                                        name            APPLICATION
                                        class           ch.qos.logback.core.rolling.RollingFileAppender
                                        classLoader     sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
                                        classLoaderHash 2a139a55
                                        <span class="token function">file</span>            app.log
                                        name            ASYNC
                                        class           ch.qos.logback.classic.AsyncAppender
                                        classLoader     sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
                                        classLoaderHash 2a139a55
                                        appenderRef     <span class="token punctuation">[</span>APPLICATION<span class="token punctuation">]</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>从<code>appenders</code>的信息里，可以看到</p><ul><li><code>CONSOLE</code> logger 的 target 是<code>System.out</code></li><li><code>APPLICATION</code> logger 是<code>RollingFileAppender</code>，它的 file 是<code>app.log</code></li><li><code>ASYNC</code>它的<code>appenderRef</code>是<code>APPLICATION</code>，即异步输出到文件里</li></ul><h4 id="查看指定名字的-logger-信息" tabindex="-1"><a class="header-anchor" href="#查看指定名字的-logger-信息" aria-hidden="true">#</a> 查看指定名字的 logger 信息</h4><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token punctuation">[</span>arthas@2062<span class="token punctuation">]</span>$ logger -n org.springframework.web
 name                                   org.springframework.web
 class                                  ch.qos.logback.classic.Logger
 classLoader                            sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
 classLoaderHash                        2a139a55
 level                                  null
 effectiveLevel                         INFO
 additivity                             <span class="token boolean">true</span>
 codeSource                             file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="查看指定-classloader-的-logger-信息" tabindex="-1"><a class="header-anchor" href="#查看指定-classloader-的-logger-信息" aria-hidden="true">#</a> 查看指定 classloader 的 logger 信息</h4><p>注意 hashcode 是变化的，需要先查看当前的 ClassLoader 信息，提取对应 ClassLoader 的 hashcode。</p><p>如果你使用<code>-c</code>，你需要手动输入 hashcode：<code>-c &lt;hashcode&gt;</code></p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token punctuation">[</span>arthas@2062<span class="token punctuation">]</span>$ logger -c 2a139a55
 name                                   ROOT
 class                                  ch.qos.logback.classic.Logger
 classLoader                            sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
 classLoaderHash                        2a139a55
 level                                  DEBUG
 effectiveLevel                         DEBUG
 additivity                             <span class="token boolean">true</span>
 codeSource                             file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
 appenders                              name            CONSOLE
                                        class           ch.qos.logback.core.ConsoleAppender
                                        classLoader     sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
                                        classLoaderHash 2a139a55
                                        target          System.out
                                        name            APPLICATION
                                        class           ch.qos.logback.core.rolling.RollingFileAppender
                                        classLoader     sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
                                        classLoaderHash 2a139a55
                                        <span class="token function">file</span>            app.log
                                        name            ASYNC
                                        class           ch.qos.logback.classic.AsyncAppender
                                        classLoader     sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
                                        classLoaderHash 2a139a55
                                        appenderRef     <span class="token punctuation">[</span>APPLICATION<span class="token punctuation">]</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>对于只有唯一实例的 ClassLoader 可以通过<code>--classLoaderClass</code>指定 class name，使用起来更加方便：</p><p><code>logger --classLoaderClass sun.misc.Launcher$AppClassLoader</code></p><ul><li>注: 这里 classLoaderClass 在 java 8 是 sun.misc.Launcher$AppClassLoader，而java 11的classloader是jdk.internal.loader.ClassLoaders$AppClassLoader。</li></ul><p><code>--classLoaderClass</code> 的值是 ClassLoader 的类名，只有匹配到唯一的 ClassLoader 实例时才能工作，目的是方便输入通用命令，而<code>-c &lt;hashcode&gt;</code>是动态变化的。</p><h4 id="更新-logger-level" tabindex="-1"><a class="header-anchor" href="#更新-logger-level" aria-hidden="true">#</a> 更新 logger level</h4><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token punctuation">[</span>arthas@2062<span class="token punctuation">]</span>$ logger --name ROOT --level debug
update logger level success.
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="指定-classloader-更新-logger-level" tabindex="-1"><a class="header-anchor" href="#指定-classloader-更新-logger-level" aria-hidden="true">#</a> 指定 classloader 更新 logger level</h4><p>默认情况下，logger 命令会在 SystemClassloader 下执行，如果应用是传统的<code>war</code>应用，或者 spring boot fat jar 启动的应用，那么需要指定 classloader。</p><p>可以先用 <code>sc -d yourClassName</code> 来查看具体的 classloader hashcode，然后在更新 level 时指定 classloader：</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token punctuation">[</span>arthas@2062<span class="token punctuation">]</span>$ logger -c 2a139a55 --name ROOT --level debug
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="查看没有-appender-的-logger-的信息" tabindex="-1"><a class="header-anchor" href="#查看没有-appender-的-logger-的信息" aria-hidden="true">#</a> 查看没有 appender 的 logger 的信息</h4><p>默认情况下，<code>logger</code>命令只打印有 appender 的 logger 的信息。如果想查看没有<code>appender</code>的 logger 的信息，可以加上参数<code>--include-no-appender</code>。</p><p>注意，通常输出结果会很长。</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token punctuation">[</span>arthas@2062<span class="token punctuation">]</span>$ logger --include-no-appender
 name                                   ROOT
 class                                  ch.qos.logback.classic.Logger
 classLoader                            sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
 classLoaderHash                        2a139a55
 level                                  DEBUG
 effectiveLevel                         DEBUG
 additivity                             <span class="token boolean">true</span>
 codeSource                             file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
 appenders                              name            CONSOLE
                                        class           ch.qos.logback.core.ConsoleAppender
                                        classLoader     sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
                                        classLoaderHash 2a139a55
                                        target          System.out
                                        name            APPLICATION
                                        class           ch.qos.logback.core.rolling.RollingFileAppender
                                        classLoader     sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
                                        classLoaderHash 2a139a55
                                        <span class="token function">file</span>            app.log
                                        name            ASYNC
                                        class           ch.qos.logback.classic.AsyncAppender
                                        classLoader     sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
                                        classLoaderHash 2a139a55
                                        appenderRef     <span class="token punctuation">[</span>APPLICATION<span class="token punctuation">]</span>

 name                                   com
 class                                  ch.qos.logback.classic.Logger
 classLoader                            sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
 classLoaderHash                        2a139a55
 level                                  null
 effectiveLevel                         DEBUG
 additivity                             <span class="token boolean">true</span>
 codeSource                             file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar

 name                                   com.alibaba
 class                                  ch.qos.logback.classic.Logger
 classLoader                            sun.misc.Launcher<span class="token variable">$AppClassLoader</span>@2a139a55
 classLoaderHash                        2a139a55
 level                                  null
 effectiveLevel                         DEBUG
 additivity                             <span class="token boolean">true</span>
 codeSource                             file:/Users/hengyunabc/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar
<span class="token punctuation">..</span>.
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