logback中appender继承

实例：

<?xml version="1.0" encoding="UTF-8"?>

<configuration debug="true" scan="true">

    <!-- 定义日志文件名称,与工程名一致 -->
    <property name="APP_NAME" value="PAS_Backstage3" />

    <!-- 定义日志的根目录 -->
    <property name="LOG_HOME" value="logs3" />

    <!-- 控制台输出设置 -->
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
            <layout class="ch.qos.logback.classic.PatternLayout">
                <pattern>
                    %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level
                    %logger{50}-%msg%n
                </pattern>
            </layout>
        </encoder>
    </appender>

    <!-- 正常文件输出设置 -->
    <appender name="FILE"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <File>${LOG_HOME}/${APP_NAME}.log</File>
        <rollingPolicy
            class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <FileNamePattern>${LOG_HOME}/${APP_NAME}/${APP_NAME}-%d{yyyy-MM-dd}-%i.zip
            </FileNamePattern>
            <maxFileSize>50MB</maxFileSize>
            <maxHistory>365</maxHistory>
            <totalSizeCap>20GB</totalSizeCap>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} -
                %msg%n</pattern>
        </encoder>
    </appender>

    <!-- 异常文件输出设置，将异常堆栈另外保存一份到单独的文件中，方便查找 -->
    <appender name="FILE_ERROR"
        class="ch.qos.logback.core.rolling.RollingFileAppender">
        <File>${LOG_HOME}/${APP_NAME}.error.log</File>
        <rollingPolicy
            class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <FileNamePattern>${LOG_HOME}/${APP_NAME}/${APP_NAME}.error-%d{yyyy-MM-dd}-%i.zip
            </FileNamePattern>
            <maxFileSize>50MB</maxFileSize>
            <maxHistory>365</maxHistory>
            <totalSizeCap>20GB</totalSizeCap>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} -
                %msg%n</pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter"><!-- 只打印错误日志 -->
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <filter class="ch.qos.logback.classic.filter.LevelFilter"><!-- 只打印警告日志 -->
            <level>WARN</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <!-- Spring framework logger -->
    <logger name="org.springframework" level="info">
        <appender-ref ref="CONSOLE" />
        <appender-ref ref="FILE" />
        <appender-ref ref="FILE_ERROR" />
    </logger>
    <!-- com.ceiec -->
    <logger name="com.ceiec" level="info">

    </logger>

    <logger name="dao" level="debug"/>

    <root level="info">
        <appender-ref ref="CONSOLE" />
        <appender-ref ref="FILE" />
        <appender-ref ref="FILE_ERROR" />
    </root>

</configuration>

可以看到，在root中配置的appender同样出现在了

org.springframework这个logger中，日志输出如下：

logback的继承体系：

不过如果加上如下配置（additivity="false"）：

则该logger不继承父logger的appender。

效果如下：