AI专业者开发社区 1 号成员
  •  0 回帖  •  2 浏览  •  4 个月前
   

[日志] spring boot + logback 日志输出配置

目录

返回目录

一、输出日志到控制台

springboot 有很多 starter（参考starter）方便快速构建项目依赖组件，logback 是 springboot 默认的日志组件，启动即可看到打印在控制台输出的 info 级别的日志：

2018-01-14 20:17:19.831 INFO 32976 --- [main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-01-14 20:17:19.832 INFO 32976 --- [main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-01-14 20:17:19.862 INFO 32976 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-14 20:17:19.862 INFO 32976 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-14 20:17:19.919 INFO 32976 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-01-14 20:17:20.166 INFO 32976 --- [main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-01-14 20:17:20.747 INFO 32976 --- [main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8082 (http)
2018-01-14 20:17:20.754 INFO 32976 --- [main] springboot.log.demo.LogMainApplication : Started LogMainApplication in 4.484 seconds (JVM running for 5.077)

从打印出的日志可以看到，日志输出内容元素具体如下：

  • 时间日期：精确到毫秒
  • 日志级别：ERROR, WARN, INFO, DEBUG or TRACE
  • 进程 ID
  • 分隔符：— 标识实际日志的开始
  • 线程名：方括号括起来（可能会截断控制台输出）
  • Logger 名：通常使用源代码的类名
  • 日志内容

springboot 的 log 一般会包含在其他 starter 里，但也有日志 starter，本例包含在

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
</dependency>

日志级别从高到低：TRACE < DEBUG < INFO < WARN < ERROR < FATAL

如果设置为 WARN ，则低于 WARN 的信息都不会输出。

Spring Boot中默认配置ERROR、WARN和INFO级别的日志输出到控制台。 

您还可以通过启动您的应用程序 --debug 标志来启用“调试”模式（开发的时候推荐开启）, 以下两种方式皆可：

  • 在运行命令后加入--debug标志，如：$ java -jar springTest.jar --debug
  • 在application.properties中配置debug=true，该属性置为true的时候，核心Logger（包含嵌入式容器、hibernate、spring）会输出更多内容，但是你自己应用的日志并不会输出为DEBUG级别。

使用 lombok 简化日志 logger：

@Slf4j
@RestController
@RequestMapping("/log")
public class LogController {
    @RequestMapping("/demo1")
    public void demo1() {
        log.info("测试 {}，输出 {}", "demo1", "info level log");}
}

可以用 {} 占位符来拼接字符串，免去了用 "+" 拼接字符串。输出结果：

2018-01-14 20:37:57.043  INFO 9020 --- [nio-8082-exec-3] s.log.demo.controller.LogController      : 测试 demo1，输出 info level log

返回目录

二、日志节点属性

返回目录

1、根节点 configuration 的属性：

（<configuration scan="true" scanPeriod="60 seconds" debug="false">）

  • 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。
返回目录

2、根节点的子节点 root：

root 节点是必选节点，用来指定最基础的日志输出级别，只有一个 level 属性。

level：用来设置打印级别，大小写无关：TRACE, DEBUG, INFO, WARN, ERROR, ALL 和 OFF，不能设置为 INHERITED 或者同义词 NULL。默认是 DEBUG。 
可以包含零个或多个元素，标识这个 appender 将会添加到这个 loger。

    <!--指定最基础的日志输出级别-->
    <root level="INFO">
        <!--appender 将会添加到这个 loger-->
        <appender-ref ref="consoleLog1"/>
        <appender-ref ref="consoleLog2"/>
    </root>
返回目录

3、根节点的子节点 contextName：设置上下文名称

每个 logger 都关联到 logger 上下文，默认上下文名称为“default”。但可以使用设置成其他名字，用于区分不同应用程序的记录。一旦设置，不能修改, 可以通过%contextName来打印日志上下文名称，一般来说我们不用这个属性，可有可无。

 <contextName>logbackdemo</contextName>

返回目录

4、根节点的子节点property：设置上下文名称

用来定义变量值的标签， 有两个属性，name 和 value；其中 name 的值是变量的名称，value 的值是变量定义的值。通过定义的值会被插入到 logger 上下文中。定义变量后，可以使“${}”来使用变量。

返回目录

5、根节点的子节点 appender

appender 用来格式化日志输出节点，有俩个属性 name 和 class，class 用来指定哪种输出策略，常用就是控制台输出策略和文件输出策略。

返回目录

控制台配置示例一：

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">

<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">contextName</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>logbackdemo<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">contextName</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">输出到控制台 ConsoleAppender</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog1"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.core.ConsoleAppender"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">展示格式 layout</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">layout </span><span style="color: rgba(255, 0, 0, 1)">class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.classic.PatternLayout"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>%d -1 %msg%n<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">layout</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">appender</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">输出到控制台 ConsoleAppender</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog2"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.core.ConsoleAppender"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">encoder</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>%d -2 %msg%n<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">encoder</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">appender</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">指定最基础的日志输出级别</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">root </span><span style="color: rgba(255, 0, 0, 1)">level</span><span style="color: rgba(0, 0, 255, 1)">="INFO"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">appender将会添加到这个loger</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog1"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog2"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">root</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>



</configuration>

View Code

控制台输出日志：

2018-01-14 21:58:00,800 -1 测试 demo1，输出 info level log
2018-01-14 21:58:00,800 -2 测试 demo1，输出 info level log

可以看到layout和encoder，都可以将事件转换为格式化后的日志记录，但是控制台输出使用layout，文件输出使用encoder，具体原因可以看http://blog.csdn.net/cw_hello1/article/details/51969554

返回目录

控制台输出示例二：

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">

<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">contextName</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>logbackdemo<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">contextName</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">输出到控制台 ConsoleAppender</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog1"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.core.ConsoleAppender"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">展示格式 layout</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">layout </span><span style="color: rgba(255, 0, 0, 1)">class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.classic.PatternLayout"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
            <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>%d{HH🇲🇲ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">layout</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!-- 过滤掉Error级别的日志，此appender仅筛选Error级别日志并输出到控制台</span><span style="color: rgba(0, 128, 0, 1)">
    &lt;filter class="ch.qos.logback.classic.filter.ThresholdFilter"&gt;
         &lt;level&gt;ERROR&lt;/level&gt;
    &lt;/filter&gt;
     </span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">appender</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">指定最基础的日志输出级别</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">root </span><span style="color: rgba(255, 0, 0, 1)">level</span><span style="color: rgba(0, 0, 255, 1)">="INFO"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">appender将会添加到这个loger</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog1"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">root</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>



</configuration>

控制台输出日志：

22:04:41.276 logbackdemo [http-nio-8082-exec-4] INFO  s.log.demo.controller.LogController - 测试 demo1，输出 info level log

<encoder>表示对日志进行编码：

  • %d{HH: mm:ss.SSS}——日志输出时间
  • %thread——输出日志的进程名字，这在 Web 应用以及异步任务处理中很有用
  • %-5level——日志级别，并且使用 5 个字符靠左对齐
  • %logger{36}——日志输出者的名字
  • %msg——日志消息
  • %n——平台的换行符 
  • ThresholdFilter 为系统定义的拦截器，例如：我们用 ThresholdFilter 来过滤掉 ERROR 级别以下的日志不输出到文件中，可以保证文件里只有 Error 级别日志。
返回目录

输出到文件的示例（RollingFileAppender）：

另一种常见的日志输出到文件，随着应用的运行时间越来越长，日志也会增长的越来越多，将他们输出到同一个文件并非一个好办法。RollingFileAppender用于切分文件日志：

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">

<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">contextName</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>logbackdemo<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">contextName</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="logback.logdir"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="I:\\xxx\\xxx\\logs"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">property </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="logback.appname"</span><span style="color: rgba(255, 0, 0, 1)"> value</span><span style="color: rgba(0, 0, 255, 1)">="logDemo"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>

<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="fileInfoLog"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.core.rolling.RollingFileAppender"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">如果只是想要 Info 级别的日志，只是过滤 info 还是会输出 Error 日志，因为 Error 的级别高，
        所以我们使用下面的策略，可以避免输出 Error 的日志</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">filter </span><span style="color: rgba(255, 0, 0, 1)">class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.classic.filter.LevelFilter"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">过滤 Error</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">level</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>ERROR<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">level</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">匹配到就禁止</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">onMatch</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>DENY<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">onMatch</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">没有匹配到就允许</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">onMismatch</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>ACCEPT<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">onMismatch</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">filter</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">日志名称，如果没有File 属性，那么只会使用FileNamePattern的文件路径规则
        如果同时有&lt;File&gt;和&lt;FileNamePattern&gt;，那么当天日志是&lt;File&gt;，明天会自动把今天
        的日志改名为今天的日期。即，&lt;File&gt; 的日志都是当天的。
    </span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">File</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>${logback.logdir}/info.${logback.appname}.log<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">File</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">滚动策略，按照时间滚动 TimeBasedRollingPolicy</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">rollingPolicy </span><span style="color: rgba(255, 0, 0, 1)">class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">文件路径,定义了日志的切分方式——把每一天的日志归档到一个文件中,以防止日志填满整个磁盘空间</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">FileNamePattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>${logback.logdir}/info.${logback.appname}.%d{yyyy-MM-dd}.log<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">FileNamePattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">只保留最近90天的日志</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">maxHistory</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>90<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">maxHistory</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">用来指定日志文件的上限大小，那么到了这个值，就会删除旧的日志</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">&lt;totalSizeCap&gt;1GB&lt;/totalSizeCap&gt;</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">rollingPolicy</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">日志输出编码格式化</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">encoder</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">charset</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>UTF-8<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">charset</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>%d [%thread] %-5level %logger{36} %line - %msg%n<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">encoder</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">appender</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="fileErrorLog"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.core.rolling.RollingFileAppender"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">如果只是想要 Error 级别的日志，那么需要过滤一下，默认是 info 级别的，ThresholdFilter</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">filter </span><span style="color: rgba(255, 0, 0, 1)">class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.classic.filter.ThresholdFilter"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">level</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>Error<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">level</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">filter</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">日志名称，如果没有File 属性，那么只会使用FileNamePattern的文件路径规则
        如果同时有&lt;File&gt;和&lt;FileNamePattern&gt;，那么当天日志是&lt;File&gt;，明天会自动把今天
        的日志改名为今天的日期。即，&lt;File&gt; 的日志都是当天的。
    </span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">File</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>${logback.logdir}/error.${logback.appname}.log<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">File</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">滚动策略，按照时间滚动 TimeBasedRollingPolicy</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">rollingPolicy </span><span style="color: rgba(255, 0, 0, 1)">class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">文件路径,定义了日志的切分方式——把每一天的日志归档到一个文件中,以防止日志填满整个磁盘空间</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">FileNamePattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>${logback.logdir}/error.${logback.appname}.%d{yyyy-MM-dd}.log<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">FileNamePattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">只保留最近90天的日志</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">maxHistory</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>90<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">maxHistory</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">用来指定日志文件的上限大小，那么到了这个值，就会删除旧的日志</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
        <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">&lt;totalSizeCap&gt;1GB&lt;/totalSizeCap&gt;</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">rollingPolicy</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">日志输出编码格式化</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">encoder</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">charset</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>UTF-8<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">charset</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>%d [%thread] %-5level %logger{36} %line - %msg%n<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">encoder</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">appender</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">指定最基础的日志输出级别</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">root </span><span style="color: rgba(255, 0, 0, 1)">level</span><span style="color: rgba(0, 0, 255, 1)">="INFO"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">appender将会添加到这个loger</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="fileInfoLog"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="fileErrorLog"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">root</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>



</configuration>

View Code

测试 log：

@Slf4j
@RestController
@RequestMapping("/log")
public class LogController {
    @RequestMapping("/demo1")
    public void demo1() {log.info("测试 {}，日志级别 {}，输出 {}", "demo1", "info", "info level log");

    log.error("测试{}，日志级别{}，输出{}", "error", "error", "error level log"<span>);
}



}

可以看到控制台不输出任何 log，并且在指定的路径 logback.logdir 下生成了两个文件：

error.logDemo.log

info.logDemo.log

error 级别的日志：

2018-01-14 22:25:40,921 [http-nio-8082-exec-1] ERROR s.log.demo.controller.LogController 18 - 测试 error，日志级别 error，输出 error level log

info 级别日志：

2018-01-14 22:25:29,041 [main] INFO o.a.coyote.http11.Http11NioProtocol 179 - Initializing ProtocolHandler ["http-nio-8082"]
2018-01-14 22:25:29,057 [main] INFO o.a.coyote.http11.Http11NioProtocol 179 - Starting ProtocolHandler ["http-nio-8082"]
2018-01-14 22:25:29,282 [main] INFO o.a.tomcat.util.net.NioSelectorPool 179 - Using a shared selector for servlet write/read
2018-01-14 22:25:29,653 [main] INFO o.s.b.c.e.t.TomcatEmbeddedServletContainer 198 - Tomcat started on port(s): 8082 (http)
2018-01-14 22:25:29,661 [main] INFO s.log.demo.LogMainApplication 57 - Started LogMainApplication in 4.743 seconds (JVM running for 5.28)
2018-01-14 22:25:40,870 [http-nio-8082-exec-1] INFO o.a.c.c.C.[Tomcat].[localhost].[/] 179 - Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-01-14 22:25:40,871 [http-nio-8082-exec-1] INFO o.s.web.servlet.DispatcherServlet 489 - FrameworkServlet 'dispatcherServlet': initialization started
2018-01-14 22:25:40,892 [http-nio-8082-exec-1] INFO o.s.web.servlet.DispatcherServlet 508 - FrameworkServlet 'dispatcherServlet': initialization completed in 21 ms
2018-01-14 22:25:40,921 [http-nio-8082-exec-1] INFO s.log.demo.controller.LogController 16 - 测试 demo1，日志级别 info，输出 info level log

通过配置 fileInfoLog 与 fileErrorLog 可以实现 info 级别日志与 error 级别日志分开记录。

将本机时间调到明天，再次执行程序：

info 已经归档了（日志配置的 info 级别的归档），info.logDemo.log 的永远是当天的日志文件。

返回目录

6、根节点的子节点 logger

<logger>用来设置某一个包或者具体的某一个类的日志打印级别、以及指定<appender>。<logger>仅有一个name属性，一个可选的level和一个可选的addtivity属性。

  • name: 用来指定受此 loger 约束的某一个包或者具体的某一个类。
  • level: 用来设置打印级别，大小写无关：TRACE, DEBUG, INFO, WARN, ERROR, ALL 和 OFF，还有一个特俗值 INHERITED 或者同义词 NULL，代表强制执行上级的级别。如果未设置此属性，那么当前 loger 将会继承上级的级别。
  • addtivity: 是否向上级 logger 传递打印信息。默认是 true(当为 true 时，还会被匹配到的 root 再次输出一次 log)。

示例记录了 trace、debug、info、warn、error 级别日志：

@Slf4j
@RestController
@RequestMapping("/log")
public class LogController {
    @RequestMapping("/demo1")
    public void demo1() {
        //日志级别从低到高分为 TRACE < DEBUG < INFO < WARN < ERROR < FATAL，如果设置为 WARN，则低于 WARN 的信息都不会输出。
        log.trace("测试 {}，日志级别 {}，输出 {}", "demo1", "trace", "trace level log");

    log.debug(</span>"测试{}，日志级别{}，输出{}", "demo1", "debug", "debug level log"<span style="color: rgba(0, 0, 0, 1)">);

    log.info(</span>"测试{}，日志级别{}，输出{}", "demo1", "info", "info level log"<span style="color: rgba(0, 0, 0, 1)">);

    log.warn(</span>"测试{}，日志级别{}，输出{}", "demo1", "warn", "warn level log"<span style="color: rgba(0, 0, 0, 1)">);

    log.error(</span>"测试{}，日志级别{}，输出{}", "demo1", "error", "error level log"<span style="color: rgba(0, 0, 0, 1)">);
}



}

返回目录

a、只指定 name

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">

<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">contextName</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>logbackdemo<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">contextName</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">输出到控制台 ConsoleAppender</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog1"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.core.ConsoleAppender"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">展示格式 layout</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">layout </span><span style="color: rgba(255, 0, 0, 1)">class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.classic.PatternLayout"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
            <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>%d{HH🇲🇲ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">layout</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">appender</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">logger </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="springboot.log.demo.controller.LogController"</span> <span style="color: rgba(0, 0, 255, 1)">/&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">指定最基础的日志输出级别</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">root </span><span style="color: rgba(255, 0, 0, 1)">level</span><span style="color: rgba(0, 0, 255, 1)">="INFO"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">appender将会添加到这个loger</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog1"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">root</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>



</configuration>

<logger name="springboot.log.demo.controller.LogController" /> 将控制 LogController 包下的所有类的日志的打印，但是并没用设置打印级别，所以继承他的上级的日志级别“info”； 

没有设置addtivity，默认为 true，将此loger的打印信息向上级传递； 
没有设置appender，此logger本身不打印任何信息。
运行程序时，LogController 的 log 会将默认级别为 log 或大于 log 级别的日志信息传递给 root，root 接收到 log 后传递给配置好的 consoleLog1 处理 consoleLog1 的 appender 将日志格式化输出到控制台。输出日志：

22:58:05.047 logbackdemo [http-nio-8082-exec-1] INFO s.log.demo.controller.LogController - 测试 demo1，日志级别 info，输出 info level log
22:58:05.047 logbackdemo [http-nio-8082-exec-1] WARN s.log.demo.controller.LogController - 测试 demo1，日志级别 warn，输出 warn level log
22:58:05.047 logbackdemo [http-nio-8082-exec-1] ERROR s.log.demo.controller.LogController - 测试 demo1，日志级别 error，输出 error level log

返回目录

b、指定级别，指定 appender

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">

<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">contextName</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>logbackdemo<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">contextName</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">输出到控制台 ConsoleAppender</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog1"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.core.ConsoleAppender"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">展示格式 layout</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">layout </span><span style="color: rgba(255, 0, 0, 1)">class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.classic.PatternLayout"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
            <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>%d{HH🇲🇲ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">layout</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">appender</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">输出到控制台 ConsoleAppender</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog2"</span><span style="color: rgba(255, 0, 0, 1)"> class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.core.ConsoleAppender"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">展示格式 layout</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">layout </span><span style="color: rgba(255, 0, 0, 1)">class</span><span style="color: rgba(0, 0, 255, 1)">="ch.qos.logback.classic.PatternLayout"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
            <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>%d{HH🇲🇲ss.SSS} %-5level %logger{36} - %msg%n<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">pattern</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">layout</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">appender</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">&lt;logger name="springboot.log.demo.controller.LogController" /&gt;</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)"> 类的全路径 </span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">logger </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="springboot.log.demo.controller.LogController"</span><span style="color: rgba(255, 0, 0, 1)"> level</span><span style="color: rgba(0, 0, 255, 1)">="WARN"</span><span style="color: rgba(255, 0, 0, 1)"> additivity</span><span style="color: rgba(0, 0, 255, 1)">="false"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog2"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">logger</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">指定最基础的日志输出级别</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">root </span><span style="color: rgba(255, 0, 0, 1)">level</span><span style="color: rgba(0, 0, 255, 1)">="INFO"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)">appender将会添加到这个loger</span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog1"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">root</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>



</configuration>

运行程序时，LogController 将 log 级别大于等于 WARN 的日志交给 logger 指定的名为 consoleLog2 的 appender 来处理。并且配置了 additivity=false，日志不再向上级传递，打印结果：

23:11:20.576 WARN s.log.demo.controller.LogController - 测试 demo1，日志级别 warn，输出 warn level log
23:11:20.577 ERROR s.log.demo.controller.LogController - 测试 demo1，日志级别 error，输出 error level log

当然如果你把additivity="false"改成additivity="true"的话，就会打印两次，因为打印信息向上级传递，logger 本身打印一次，root 接到后又打印一次。

不要配置多个相同的 logger。如果配置多个 logger，范围小的有效：

    <logger name="springboot.log.demo.controller.LogController" />

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)"> 类的全路径 </span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">logger </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="springboot.log.demo.controller.LogController"</span><span style="color: rgba(255, 0, 0, 1)"> level</span><span style="color: rgba(0, 0, 255, 1)">="DEBUG"</span><span style="color: rgba(255, 0, 0, 1)"> additivity</span><span style="color: rgba(0, 0, 255, 1)">="false"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog2"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">logger</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span></pre>

控制台输出：

23:17:00.100 DEBUG s.log.demo.controller.LogController - 测试 demo1，日志级别 debug，输出 debug level log
23:17:00.100 INFO  s.log.demo.controller.LogController - 测试 demo1，日志级别 info，输出 info level log
23:17:00.100 WARN  s.log.demo.controller.LogController - 测试 demo1，日志级别 warn，输出 warn level log
23:17:00.100 ERROR s.log.demo.controller.LogController - 测试 demo1，日志级别 error，输出 error level log
返回目录

三、多环境日志输出

<configuration>
    ...

</span><span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)"> 测试环境+开发环境. 多个使用逗号隔开. </span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">springProfile </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="test,dev"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">logger </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="springboot.log.demo.controller"</span><span style="color: rgba(255, 0, 0, 1)"> level</span><span style="color: rgba(0, 0, 255, 1)">="DEBUG"</span><span style="color: rgba(255, 0, 0, 1)"> additivity</span><span style="color: rgba(0, 0, 255, 1)">="false"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">logger</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">springProfile</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>

<span style="color: rgba(0, 128, 0, 1)">&lt;!--</span><span style="color: rgba(0, 128, 0, 1)"> 生产环境. </span><span style="color: rgba(0, 128, 0, 1)">--&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">springProfile </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="prod"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">logger </span><span style="color: rgba(255, 0, 0, 1)">name</span><span style="color: rgba(0, 0, 255, 1)">="springboot.log.demo.controller"</span><span style="color: rgba(255, 0, 0, 1)"> level</span><span style="color: rgba(0, 0, 255, 1)">="INFO"</span><span style="color: rgba(255, 0, 0, 1)"> additivity</span><span style="color: rgba(0, 0, 255, 1)">="false"</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
        <span style="color: rgba(0, 0, 255, 1)">&lt;</span><span style="color: rgba(128, 0, 0, 1)">appender-ref </span><span style="color: rgba(255, 0, 0, 1)">ref</span><span style="color: rgba(0, 0, 255, 1)">="consoleLog"</span><span style="color: rgba(0, 0, 255, 1)">/&gt;</span>
    <span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">logger</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>
<span style="color: rgba(0, 0, 255, 1)">&lt;/</span><span style="color: rgba(128, 0, 0, 1)">springProfile</span><span style="color: rgba(0, 0, 255, 1)">&gt;</span>



</configuration>

当 application.yml 设置环境为 test 时，激活 log 为 test 配置；设置为 prod 时，激活 log 配置为 prod 配置：

spring:
profiles:
active: test
返回目录

四、自定义日志配置

开发调试中输出到控制台可以利于排错和调试，但是测试环境和生产环境要查看日志就需要保留日志到指定存储的地方，这时候就需要使用自定义日志输出格式和保存路径了。

根据不同的日志系统，你可以按如下规则组织配置文件名，就能被正确加载：

  • Logback：logback-spring.xml, logback-spring.groovy, logback.xml, logback.groovy
  • Log4j：log4j-spring.properties, log4j-spring.xml, log4j.properties, log4j.xml
  • Log4j2：log4j2-spring.xml, log4j2.xml
  • JDK (Java Util Logging)：logging.properties

 Spring Boot官方推荐优先使用带有-spring的文件名作为你的日志配置（如使用logback-spring.xml，而不是logback.xml），命名为logback-spring.xml的日志配置文件，spring boot可以为它添加一些spring boot特有的配置项。 

默认的命名规则，并且放在 src/main/resources 下面即可。如果你即想完全掌控日志配置，但又不想用logback.xml作为Logback配置的名字，application.yml可以通过logging.config属性指定自定义的名字：

logging.config=classpath:logging-config.xml

返回目录

五：输出 mybatis 执行 sql 的 log

开发中常常需要将 mybatis 执行的 sql 输出到控制台，但 mybatis 的 sql 输出级别是 debug，可以利用 logger 的属性针对 mapper 包设置输出 log 级别，如下所示：

    <springProfile name="dev">
        <root>
            <level value="info"/>
            <appender-ref ref="STDOUT"/>
        </root>
        <logger name="com.demo.mapper" level="DEBUG" additivity="false">
            <appender-ref ref="STDOUT" />
        </logger>
    </springProfile>
返回目录

六：参考

http://blog.csdn.net/inke88/article/details/75007649

http://blog.csdn.net/vitech/article/details/53812137

https://juejin.im/post/58f86981b123db0062363203