WT Blog | 创意开发者作品集

参考：https://blog.csdn.net/qq_27706119/article/details/104977666（主要）
https://www.liaoxuefeng.com/wiki/1252599548343744/1264739155914176（廖雪峰）

简介：Commons Logging和Log4j是比较老牌的，随着时代的进步，我们越来越多的人开始用SLF4J和Logback了

首先slf4j已被springboot内部已经集成，无需动pom
启动文件上面加@slf4j
application.yml增加配置，后面要被用到

#输出日志信息
logging:
  level:
    com.oneonline.teaching.admin: debug  #debug(调试 ) < info(消息) < warn(警告) < error(错误) < fatal(严重错误)。
  path: ${LOG_PATH:/Users/wt/work/java/mySpringboot}

resources/增加文件logback-spring.xml，有加载顺序，命名需这样命名，可参考这个
见xml配置

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="true">
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <property resource="application.yml"/>
    <!--定义-日志文件的存储地址 勿在 LogBack 的配置中使用相对路径-->
    <springProperty name="LOG_HOME" scope="context" source="logging.path" defaultValue="/Users/wt/work/java/mySpringboot/log"/>

<span class="token comment">&lt;!-- 控制台输出 --&gt;</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">"</span>STDOUT<span class="token punctuation">"</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">"</span>ch.qos.logback.core.ConsoleAppender<span class="token punctuation">"</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 attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>ch.qos.logback.classic.encoder.PatternLayoutEncoder<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token comment">&lt;!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符--&gt;</span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>pattern</span><span class="token punctuation">&gt;</span></span>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %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 comment">&lt;!-- 按照每天生成日志文件 --&gt;</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">"</span>FILE<span class="token punctuation">"</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">"</span>ch.qos.logback.core.rolling.RollingFileAppender<span class="token punctuation">"</span></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">"</span>ch.qos.logback.core.rolling.TimeBasedRollingPolicy<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token comment">&lt;!--日志文件输出的文件名--&gt;</span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>FileNamePattern</span><span class="token punctuation">&gt;</span></span>${LOG_HOME}/SpringBoot-Slf4j_%d{yyyy-MM-dd}.log<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 comment">&lt;!--日志文件保留天数--&gt;</span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>MaxHistory</span><span class="token punctuation">&gt;</span></span>30<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>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 attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>ch.qos.logback.classic.encoder.PatternLayoutEncoder<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token comment">&lt;!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符--&gt;</span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>pattern</span><span class="token punctuation">&gt;</span></span>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %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 comment">&lt;!--日志文件最大的大小--&gt;</span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>triggeringPolicy</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy<span class="token punctuation">"</span></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>10MB<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>triggeringPolicy</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 comment">&lt;!-- 定义控制台输出 --&gt;</span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>property</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>CONSOLE_LOG_PATTERN<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>%boldMagenta([%d{yyyy-MM-dd HH:mm:ss.SSS}]) %cyan([%X{requestId}]) %cyan([${PID:- }]) %boldMagenta(%-5level) %red([%thread]) %blue(%logger{15}) %blue(%L) %magenta(:) %cyan(%msg%n)<span class="token punctuation">"</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 attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>CONSOLE<span class="token punctuation">"</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">"</span>ch.qos.logback.core.ConsoleAppender<span class="token punctuation">"</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 attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>ch.qos.logback.classic.encoder.PatternLayoutEncoder<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>
        <span class="token comment">&lt;!-- 变量引入  --&gt;</span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>pattern</span><span class="token punctuation">&gt;</span></span>${CONSOLE_LOG_PATTERN}<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>UTF-8<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 comment">&lt;!--格式化输出：%d表示日期，%thread表示线程

        名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符--&gt;</span>
        <span class="token comment">&lt;!-- &lt;pattern&gt;%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg%n&lt;/pattern&gt;--&gt;</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 comment">&lt;!-- 日志输出级别 --&gt;</span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>logger</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>org.springframework<span class="token punctuation">"</span></span> <span class="token attr-name">level</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>INFO<span class="token punctuation">"</span></span><span class="token punctuation">/&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>logger</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>com.example.myspringboot<span class="token punctuation">"</span></span> <span class="token attr-name">level</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>INFO<span class="token punctuation">"</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 attr-name">level</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>INFO<span class="token punctuation">"</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">"</span>CONSOLE<span class="token punctuation">"</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">"</span>FILE<span class="token punctuation">"</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></configuration>

tip：日后会更新结合阿里云日志服务

springboot增加slf4j