SpringBoot的logback日志分级、读取外部logback配置

1. 最近需要独立记录各个级别的日志，以下是个人SpringBoot的Logback.xml的配置

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds">
    <!--定义日志文件的存储地址 勿在 LogBack 的配置中使用相对路径-->
    <property name="log.home" value="logs"/>

    <!-- 控制台输出 -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%boldYellow(%thread)] %highlight(%-5level) %boldGreen(%logger{50}) - %msg%n
            </pattern>
        </layout>
    </appender>
    <!--输出DEBUG日志-->
    <appender name="DEBUG" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.home}/debug/project-name-debug.%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n</pattern>
            <charset>utf-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter"><!-- 只打印DEBUG日志 -->
            <level>DEBUG</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!--输出INFO日志-->
    <appender name="INFO" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.home}/info/project-name-info.%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n</pattern>
            <charset>utf-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter"><!-- 只打印INFO日志 -->
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!--输出ERROR日志-->
    <appender name="ERROR" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.home}/error/project-name-error.%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n</pattern>
            <charset>utf-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter"><!-- 只打印ERROR日志 -->
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!--输出WARN日志-->
    <appender name="WARN" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.home}/warn/project-name-warn.%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
        <append>true</append>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n</pattern>
            <charset>utf-8</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter"><!-- 只打印WARN日志 -->
            <level>WARN</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!-- 日志输出级别 ERROR/WARN/INFO/DEBUG 推荐使用INFO-->
    <root level="INFO">
        <appender-ref ref="STDOUT"/>
        <appender-ref ref="DEBUG"/>
        <appender-ref ref="INFO"/>
        <appender-ref ref="ERROR"/>
        <appender-ref ref="WARN"/>
    </root>
</configuration>

2. 我这个项目Logback.xml配置在项目外的config文件夹中，SpringBoot的默认读取机制是读取不到的，需要在启动命令中加入以下参数

java -jar -Dlogging.config=./config/logback.xml ./包名.jar &