简介

一份可用的logback.xml配置，可以按日期、文件大小切分文件

生成文件列表效果如下

project-debug-20220519.0.log
project-error-20220519.0.log
project-info-20220519.0.log
project-info-20220519.1.log
project-info-20220519.2.log
project-warn-20220519.0.log
project-debug-20220518.0.log
project-error-20220518.0.log
project-info-20220518.0.log
project-info-20220518.1.log
project-info-20220518.2.log
project-info-20220518.3.log
project-warn-20220518.0.log

可用于SpringBoot项目

部分关键可配配置

坑

注意：使用maxFileSize需要把rollingPolicy设为SizeAndTimeBasedRollingPolicy才行，不然报错

no applicable action for [maxFileSize], current ElementPath  is [[configuration][appender][rollingPolicy][maxFileSize]]

原因是SizeAndTimeBasedRollingPolicy才有maxFileSize这个属性，他继承了TimeBasedRollingPolicy

public class SizeAndTimeBasedRollingPolicy<E> extends TimeBasedRollingPolicy<E> {

    FileSize maxFileSize;

    /**
    * 省略
    */
}

完整xml文件

<?xml version="1.0" encoding="UTF-8"?>
<!-- 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 -->
<!-- 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 scan="true" scanPeriod="10 seconds">
    <!--<include resource="org/springframework/boot/logging/logback/base.xml"
        /> -->
    <!-- name的值是变量的名称，value的值时变量定义的值。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。 -->
    <property name="log.path" value="logs/project" />
    <!-- 日志最大的历史 30天 -->
    <property name="maxHistory" value="30" />
    <!-- 单个日志文件大小 -->
    <property name="totalSizeCap" value="5GB"/>
    <property name="maxFileSize" value="30MB"/>
    

    <!-- 控制台输出日志 -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level -%msg%n</pattern>
            <charset class="java.nio.charset.Charset">UTF-8</charset>
        </encoder>
    </appender>


    <!-- ERROR级别日志 -->
    <appender name="ERROR"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${log.path}\project-error-%d{yyyyMMdd}.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <totalSizeCap>${totalSizeCap}</totalSizeCap>
            <maxFileSize>${maxFileSize}</maxFileSize>
        </rollingPolicy>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level -%msg%n</pattern>
            <charset class="java.nio.charset.Charset">UTF-8</charset>
        </encoder>
        <append>false</append>
        <prudent>false</prudent>
    </appender>

    <!-- WARN级别日志 -->
    <appender name="WARN"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>WARN</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${log.path}\project-warn-%d{yyyyMMdd}.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <totalSizeCap>${totalSizeCap}</totalSizeCap>
            <maxFileSize>${maxFileSize}</maxFileSize>
        </rollingPolicy>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level -%msg%n</pattern>
            <charset class="java.nio.charset.Charset">UTF-8</charset>
        </encoder>
        <append>false</append>
        <prudent>false</prudent>
    </appender>

    <!-- INFO级别日志 -->
    <appender name="INFO"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${log.path}\project-info-%d{yyyyMMdd}.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <totalSizeCap>${totalSizeCap}</totalSizeCap>
            <maxFileSize>${maxFileSize}</maxFileSize>
        </rollingPolicy>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level -%msg%n</pattern>
            <charset class="java.nio.charset.Charset">UTF-8</charset>
        </encoder>
        <append>false</append>
        <prudent>false</prudent>
    </appender>

    <!-- DEBUG级别日志 -->
    <appender name="DEBUG"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>DEBUG</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy
                class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${log.path}\project-debug-%d{yyyyMMdd}.%i.log</fileNamePattern>
            <maxHistory>${maxHistory}</maxHistory>
            <totalSizeCap>${totalSizeCap}</totalSizeCap>
            <maxFileSize>${maxFileSize}</maxFileSize>
        </rollingPolicy>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level -%msg%n</pattern>
            <charset class="java.nio.charset.Charset">UTF-8</charset>
        </encoder>
        <append>false</append>
        <prudent>false</prudent>
    </appender>

    <!-- root级别 DEBUG -->
    <root level="INFO">
        <!-- 控制台输出 -->
        <appender-ref ref="STDOUT" />
        <!-- 文件输出 -->
        <appender-ref ref="ERROR" />
        <appender-ref ref="INFO" />
        <appender-ref ref="WARN" />
        <appender-ref ref="DEBUG" />
    </root>
</configuration>