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class="button-bottom"></span></span></button></div></header><!----><!--]--><!----><div class="toggle-sidebar-wrapper"><span class="arrow left"></span></div><aside class="sidebar"><!--[--><!----><!--]--><ul class="sidebar-links"><li><!--[--><a href="/home.html" class="nav-link sidebar-link sidebar-page" aria-label="一、前言"><!---->一、前言<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">二、Java核心</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">三、Java企业级开发</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.1 开发工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.2 IDE/编辑器</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.3 Spring</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">3.4 SpringBoot</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/springboot/initializr.html" class="nav-link sidebar-link sidebar-page" aria-label="搭建第一个Spring Boot项目"><!---->搭建第一个Spring Boot项目<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/mysql-druid.html" class="nav-link sidebar-link sidebar-page" aria-label="整合MySQL和Druid"><!---->整合MySQL和Druid<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/jpa.html" class="nav-link sidebar-link sidebar-page" aria-label="整合JPA"><!---->整合JPA<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/thymeleaf.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Thymeleaf"><!---->整合Thymeleaf<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/transaction.html" class="nav-link sidebar-link sidebar-page" aria-label="开启事务支持"><!---->开启事务支持<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/Filter-Interceptor-Listener.html" class="nav-link sidebar-link sidebar-page" aria-label="过滤器、拦截器、监听器"><!---->过滤器、拦截器、监听器<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/redis/redis-springboot.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Redis实现缓存"><!---->整合Redis实现缓存<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/springboot/logback.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="整合Logback"><!---->整合Logback<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/logback.html#关于-logback" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="关于 Logback"><!---->关于 Logback<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/logback.html#直接上手" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="直接上手"><!---->直接上手<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/logback.html#编程喵实战项目的日志案例分析" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="编程喵实战项目的日志案例分析"><!---->编程喵实战项目的日志案例分析<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/logback.html#使用-lombok-进行日志记录" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="使用 lombok 进行日志记录"><!---->使用 lombok 进行日志记录<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/springboot/logback.html#源码路径" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="源码路径"><!---->源码路径<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/springboot/swagger.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Swagger-UI"><!---->整合Swagger-UI<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/gongju/knife4j.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Knife4j"><!---->整合Knife4j<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/springtask.html" class="nav-link sidebar-link sidebar-page" aria-label="整合SpringTask"><!---->整合SpringTask<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/kaiyuan/auto-generator.html" class="nav-link sidebar-link sidebar-page" aria-label="整合MyBatis-Plus AutoGenerator"><!---->整合MyBatis-Plus AutoGenerator<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/quartz.html" class="nav-link sidebar-link sidebar-page" aria-label="整合Quartz"><!---->整合Quartz<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/mybatis.html" class="nav-link sidebar-link sidebar-page" aria-label="整合MyBatis"><!---->整合MyBatis<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/docker.html" class="nav-link sidebar-link sidebar-page" aria-label="部署SpringBoot到Docker"><!---->部署SpringBoot到Docker<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/macos-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="macOS下如何运行编程喵源码"><!---->macOS下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/windows-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="Windows下如何运行编程喵源码"><!---->Windows下如何运行编程喵源码<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/linux-codingmore-run.html" class="nav-link sidebar-link sidebar-page" aria-label="一键部署编程喵到生产环境"><!---->一键部署编程喵到生产环境<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/springboot/validator.html" class="nav-link sidebar-link sidebar-page" aria-label="SpringBoot中如何处理校验逻辑"><!---->SpringBoot中如何处理校验逻辑<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.5 辅助工具</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.6 开源轮子</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.7 分布式</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">3.8 消息队列</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">四、数据库</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">五、计算机基础</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">六、求职面试</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">七、学习资源</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">八、学习建议</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">九、知识库搭建</span><span class="arrow right"></span></button><!----></section><!--]--></li><li><!--[--><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">十、联系作者</span><span class="arrow right"></span></button><!----></section><!--]--></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Spring Boot 整合 Logback 定制日志框架</h1><div class="page-info"><span class="author-info" aria-label="作者🖊" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon author-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="author icon"><path d="M649.6 633.6c86.4-48 147.2-144 147.2-249.6 0-160-128-288-288-288s-288 128-288 288c0 108.8 57.6 201.6 147.2 249.6-121.6 48-214.4 153.6-240 288-3.2 9.6 0 19.2 6.4 25.6 3.2 9.6 12.8 12.8 22.4 12.8h704c9.6 0 19.2-3.2 25.6-12.8 6.4-6.4 9.6-16 6.4-25.6-25.6-134.4-121.6-240-243.2-288z"></path></svg><span><a class="author-item" href="/about-the-author/" target="_blank" rel="noopener noreferrer">沉默王二</a></span><span property="author" content="沉默王二"></span></span><!----><span class="date-info" aria-label="写作日期📅" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span>2022年5月21日</span><meta property="datePublished" content="2022-05-21T00:14:16.000Z"></span><span class="category-info" aria-label="分类🌈" data-balloon-pos="down" isoriginal="false" pageview="false"><svg xmlns="http://www.w3.org/2000/svg" class="icon category-icon" viewbox="0 0 1024 1024" fill="currentColor" aria-label="category icon"><path d="M148.41 106.992h282.176c22.263 0 40.31 18.048 40.31 40.31V429.48c0 22.263-18.047 40.31-40.31 40.31H148.41c-22.263 0-40.311-18.047-40.311-40.31V147.302c0-22.263 18.048-40.31 40.311-40.31zM147.556 553.478H429.73c22.263 0 40.311 18.048 40.311 40.31v282.176c0 22.263-18.048 40.312-40.31 40.312H147.555c-22.263 0-40.311-18.049-40.311-40.312V593.79c0-22.263 18.048-40.311 40.31-40.311zM593.927 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class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#关于-logback" class="router-link-active router-link-exact-active toc-link level2">关于 Logback</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#直接上手" class="router-link-active router-link-exact-active toc-link level2">直接上手</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#编程喵实战项目的日志案例分析" class="router-link-active router-link-exact-active toc-link level2">编程喵实战项目的日志案例分析</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#使用-lombok-进行日志记录" class="router-link-active router-link-exact-active toc-link level2">使用 lombok 进行日志记录</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/springboot/logback.html#源码路径" class="router-link-active router-link-exact-active toc-link level2">源码路径</a></li><!----><!--]--></ul></div></aside></div><!----><div class="theme-hope-content"><h2 id="关于-logback" tabindex="-1"><a class="header-anchor" href="#关于-logback" aria-hidden="true">#</a> 关于 Logback</h2><p>日志系统是一个线上项目必备的素质之一，代表性的日志框架 Log4j、SLF4J、Logback 这哥仨竟然是亲兄弟，他们有一个亲爹，那就是巨佬 Ceki Gulcu。</p><p>由于 Spring Boot 的默认日志框架选用的 Logback，再加上 Log4j2 之前爆过严重的漏洞，所以我们这次就只关注 Logback。</p><p>1）Logback 非常自然地实现了 SLF4J，不需要像 Log4j 和 JUL 那样加一个适配层。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-67c983bf-101d-48cc-80da-3cb031d7407b.png" alt=""></p><p>2）Spring Boot 的默认日志框架使用的是 Logback，启动编程喵项目的时候就可以看到 Logback 记录的日志了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-a2cacfa1-484a-4904-bea3-248d12097387.png" alt=""></p><p>怎么看出来是 logback 呢？</p><p>说实话，看不出来，哈哈哈，不过可以从 Spring Boot 官网找到证据。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-9ac58c2c-e7f9-4df7-aede-ba7d5c69741c.png" alt=""></p><p>还有，通过源码也可以窥见一二。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-7a10bd7b-598a-4c30-9c83-b80689671f41.png" alt=""></p><p>3）logback 分为三个模块：</p><ul><li>logback-core，核心模块，提供了关键的通用机制；</li><li>logback-classic，可以看作是 log4j 的改进版，实现了简单的日志门面 SLF4J；</li><li>logback-access，主要用来和 Servlet 容器交互，比如说 Tomcat，提供了一些 HTTP 访问的功能。</li></ul><p>如果想研究 logback 源码的话，可以按照这三个模块去研究。</p><h2 id="直接上手" tabindex="-1"><a class="header-anchor" href="#直接上手" aria-hidden="true">#</a> 直接上手</h2><p>不废话，直接新建一个空的 Spring Boot 项目，在测试类中加上两行代码。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token annotation punctuation">@SpringBootTest</span>
<span class="token keyword">class</span> <span class="token class-name">CodingmoreLogbackApplicationTests</span> <span class="token punctuation">{</span>
<span class="token keyword">static</span> <span class="token class-name">Logger</span> logger <span class="token operator">=</span> <span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">CodingmoreLogbackApplicationTests</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token annotation punctuation">@Test</span>
<span class="token keyword">void</span> <span class="token function">contextLoads</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
logger<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"logback testing"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<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></div><p>Logger 和 LoggerFactory 都来自 SLF4J，所以如果项目是从 Log4j + SLF4J 切换到 Logback 的话，此时的代码是零改动的。</p><p>其他什么也不用做，运行后就可以看到 logback 已经正常工作了。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-07c6b600-3667-4113-bbd5-5ec25990e9dc.png" alt=""></p><p>在没有配置文件的情况下，一切都是默认的，Logback 的日志信息会输出到控制台。可以通过 StatusPrinter 来打印 Logback 的内部信息：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token class-name">LoggerContext</span> lc <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">LoggerContext</span><span class="token punctuation">)</span><span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getILoggerFactory</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">StatusPrinter</span><span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>lc<span class="token punctuation">)</span><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></div><p>再次运行测试类，可以在控制台看到以下信息：</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-05b134ab-b6e6-4a10-a00c-41b829938618.png" alt=""></p><p>也就是说，Logback 会在 classpath 路径下先寻找 logback-test.xml 文件，没有找到的话，寻找 logback.xml 文件，都找不到的话，就输出到控制台。</p><p>并且，Logger 的默认日志级别是 INFO 级别的，这就意味着如果尝试下面的代码：</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code>logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">"沉默王二是傻 X"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>控制台是看不到这行日志输出的。Logback 的日志级别是这样的：</p><blockquote><p>TRACE < DEBUG < INFO < WARN < ERROR</p></blockquote><p>也就是说小于 INFO 级别的日志都不会记录，只有大于等于 INFO 级别的日志才会被记录。</p><h2 id="编程喵实战项目的日志案例分析" tabindex="-1"><a class="header-anchor" href="#编程喵实战项目的日志案例分析" aria-hidden="true">#</a> 编程喵实战项目的日志案例分析</h2><p>尽管默认配置很有用，但它很可能不能满足我们的实际开发需求，于是我们需要找到一种更优雅的解决方案。</p><p>当 <code>src/main/resources</code> 目录下有以下名称之一的配置文件时，Spring Boot 将自动加载它来作为 Logback 的配置项：</p><ul><li>logback-spring.xml</li><li>logback.xml</li><li>logback-spring.groovy</li><li>logback.groovy</li></ul><p>Spring Boot 建议我们使用 <code>-spring</code> 结尾的配置文件，这样可以使用 Spring Boot 的 Profile 功能（针对不同的环境（开发环境、测试环境、正式环境）提供不同的配置项）。</p><p>编程喵用的是 logback-spring.xml（在 codingmore-admin 项目下可以找得到）：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code><!--
configuration 有三个属性：
scan：当此属性设置为true时，配置文件如果发生改变，将会被重新加载，默认值为true。
scanPeriod：设置监测配置文件是否有修改的时间间隔，如果没有给出时间单位，默认单位是毫秒当scan为true时，此属性生效。默认的时间间隔为1分钟。
debug：当此属性设置为true时，将打印出logback内部日志信息，实时查看logback运行状态。默认值为false。
-->
<configuration>
<include resource="org/springframework/boot/logging/logback/defaults.xml" />
<!-- 定义日志文件名称 -->
<property name="APP_NAME" value="codingmore-admin" />
<!-- 定义日志文件的路径 -->
<property name="LOG_PATH" value="${user.home}/${APP_NAME}/logs" />
<!-- 定义日志的文件名 -->
<property name="LOG_FILE" value="${LOG_PATH}/codingmore-admin.log" />
<!-- 滚动记录日志，先将日志记录到指定文件，当符合某个条件时，将日志记录到其他文件 -->
<appender name="APPLICATION"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<!-- 指定日志文件的名称 -->
<file>${LOG_FILE}</file>
<!--
当发生滚动时，决定 RollingFileAppender 的行为，涉及文件移动和重命名
TimeBasedRollingPolicy： 最常用的滚动策略，它根据时间来制定滚动策略，既负责滚动也负责触发滚动。
-->
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<!--
滚动时产生的文件的存放位置及文件名称
%d{yyyy-MM-dd}：按天进行日志滚动
%i：当文件大小超过maxFileSize时，按照i进行文件滚动
-->
<fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
<!--
可选节点，控制保留的归档文件的最大数量，超出数量就删除旧文件。假设设置每天滚动，
且maxHistory是7，则只保存最近7天的文件，删除之前的旧文件。
注意，删除旧文件时，那些为了归档而创建的目录也会被删除。
-->
<maxHistory>7</maxHistory>
<!--
当日志文件超过maxFileSize指定的大小时，根据上面提到的%i进行日志文件滚动
注意此处配置SizeBasedTriggeringPolicy是无法实现按文件大小进行滚动的，
必须配置timeBasedFileNamingAndTriggeringPolicy
-->
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>50MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<!-- 日志输出格式： -->
<layout class="ch.qos.logback.classic.PatternLayout">
<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [ %thread ] - [ %-5level ] [ %logger{50} : %line ] - %msg%n</pattern>
</layout>
</appender>
<!-- ch.qos.logback.core.ConsoleAppender 表示控制台输出 -->
<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
<!--
日志输出格式：
%d表示日期时间，%green 绿色
%thread表示线程名，%magenta 洋红色
%-5level：级别从左显示5个字符宽度 %highlight 高亮色
%logger{36} 表示logger名字最长36个字符，否则按照句点分割 %yellow 黄色
%msg：日志消息
%n是换行符
-->
<layout class="ch.qos.logback.classic.PatternLayout">
<pattern>%green(%d{yyyy-MM-dd HH:mm:ss.SSS}) [%magenta(%thread)] %highlight(%-5level) %yellow(%logger{36}): %msg%n</pattern>
</layout>
</appender>
<!--
root与logger是父子关系，没有特别定义则默认为root，任何一个类只会和一个logger对应，
要么是定义的logger，要么是root，判断的关键在于找到这个logger，然后判断这个logger的appender和level。
-->
<root level="info">
<appender-ref ref="CONSOLE" />
<appender-ref ref="APPLICATION" />
</root>
</configuration>
</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 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 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>具体含义都写在了注释里，大家可以细致看一下，了解即可。基本上生产环境下的 Logback 配置就是这样的，可微调。</p><p>也可以使用下面这份 logback-spring.xml。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code><?xml version="1.0" encoding="UTF-8"?>
<configuration >
<include resource="org/springframework/boot/logging/logback/defaults.xml" />
<property name="APP_NAME" value="codingmore-admin" />
<property name="LOG_PATH" value="${user.home}/${APP_NAME}/logs" />
<property name="LOG_FILE" value="${LOG_PATH}/codingmore-admin.log" />
<appender name="APPLICATION"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${LOG_FILE}</file>
<encoder>
<pattern>${FILE_LOG_PATTERN}</pattern>
</encoder>
<rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
<fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
<maxHistory>7</maxHistory>
<maxFileSize>50MB</maxFileSize>
<totalSizeCap>2GB</totalSizeCap>
</rollingPolicy>
</appender>
<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>${CONSOLE_LOG_PATTERN}</pattern>
<charset>utf8</charset>
</encoder>
</appender>
<root level="info">
<appender-ref ref="CONSOLE" />
<appender-ref ref="APPLICATION" />
</root>
</configuration>
</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 class="line-number"></div><div class="line-number"></div></div></div><p>只说几个不同的点。</p><p><code>FILE_LOG_PATTERN</code> 和 <code>CONSOLE_LOG_PATTERN</code> 是在 Spring Boot 中默认定义的。</p><blockquote><p><a href="https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java" target="_blank" rel="noopener noreferrer">https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java<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">open in new window</span></span></a></p></blockquote><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-87217069-b756-4c0c-945e-06ecc5785b81.png" alt=""></p><p>SizeAndTimeBasedRollingPolicy 比 TimeBasedRollingPolicy 多了一个日志文件大小设定的属性：maxFileSize，其他完全一样。</p><p>totalSizeCap，所有日志文件的大小（可选项）。超出这个大小时，旧的日志文件将会被异步删除。需要配合 maxHistory 属性一起使用，并且是第二条件。</p><p>在Intellij IDEA 中启动项目，我们来查看一下配置后的日志效果（控制台中）。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-1a849206-617e-45d5-b199-50787c12e9bc.png" alt=""></p><p>由于我们加了颜色配置，所以控制台日志看起来对眼睛更友好了一些。</p><p>那配置的日志文件在哪里呢？在 <code>user.home</code> 下，如果不确定具体值是什么的话，可以通过 <code>System.getProperty("user.home")</code> 获取到。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-bdb8558e-2fd0-488e-9a0a-7c78234eae7a.png" alt=""></p><p>顺着这个路径就可以找到生成的日志文件了，并且日志的生成策略也是符合我们的预期的。</p><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-3e5c5534-470b-4ec4-b5fa-cb2a6fbbaee4.png" alt=""></p><h2 id="使用-lombok-进行日志记录" tabindex="-1"><a class="header-anchor" href="#使用-lombok-进行日志记录" aria-hidden="true">#</a> 使用 lombok 进行日志记录</h2><p>在上面的例子中，我们必须在类中声明一个静态的 Logger 对象才能在需要记录日志的地方使用它。</p><div class="language-java ext-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">static</span> <span class="token class-name">Logger</span> logger <span class="token operator">=</span> <span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">CodingmoreLogbackApplicationTests</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>这样的样板代码令人生厌！</p><p>我们可以通过 lombok 的方式来解决这个问题，在 pom.xml 文件中加入依赖。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code><dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
</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></div><p>然后在类上加上 <code>@Slf4j</code> 注解，之后就可以直接使用 log（添加<code>@Slf4j</code> 注解后会自动添加一个 log 字段）来记录日志了。</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>@SpringBootTest
@Slf4j
class CodingmoreLogbackApplicationTests {
@Test
void testSlf4j() {
log.info("沉默王二是个大煞笔");
}
}
</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><hr><p>更多内容，只针对《Java 程序员进阶之路》星球用户开放，需要的小伙伴可以<a href="https://tobebetterjavaer.com/zhishixingqiu/" target="_blank" rel="noopener noreferrer">戳链接🔗<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">open in new window</span></span></a>加入我们的星球，一起学习，一起卷。。<strong>编程喵</strong>🐱是一个 Spring Boot+Vue 的前后端分离项目，融合了市面上绝大多数流行的技术要点。通过学习实战项目，你可以将所学的知识通过实践进行检验、你可以拓宽自己的技术边界，你可以掌握一个真正的实战项目是如何从 0 到 1 的。</p><hr><p><img src="http://cdn.tobebetterjavaer.com/tobebetterjavaer/images/springboot/logback-cd491159-e48e-4c74-a67f-7962a45e847f.png" alt=""></p><h2 id="源码路径" tabindex="-1"><a class="header-anchor" href="#源码路径" aria-hidden="true">#</a> 源码路径</h2><blockquote><ul><li>编程喵：<a href="https://github.com/itwanger/coding-more" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<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">open in new window</span></span></a></li><li>Logback 详细配置专用：<a href="https://github.com/itwanger/codingmore-learning/tree/main/codingmore-logback" target="_blank" rel="noopener noreferrer">https://github.com/itwanger/coding-more<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">open in new window</span></span></a></li></ul></blockquote><p><img 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