SpringBoot Logback配置文件引入子配置文件

主项目Logback

logback-spring-dev.xml

<configuration>
	<include resource="org/springframework/boot/logging/logback/defaults.xml" />
	<include resource="logback-child-log.xml" />

	<springProperty scope="context" name="SYSLOG_FILE" source="logging.file" defaultValue="/opt/app.log" />
	<appender name="console" class="ch.qos.logback.core.ConsoleAppender">
		<!-- log pattern -->
		<encoder>
			<pattern>%date{yyyy-MM-dd HH:mm:ss.SSS} @project.name@ ${MY_POD_NAME} %thread %logger{36} %-5level %msg%n</pattern>
		</encoder>
	</appender>
	
	<root level="${logging.level.root}">
		<appender-ref ref="console" />
	</root>
</configuration>

子项目Logback

logback-child-log.xml

<?xml version="1.0" encoding="UTF-8"?>
<included>
    <!-- 演示按时间滚动的策略 -->
    <appender name="logicFile" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>/opt/logic_app.log</file>

        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>/opt/logs/@project.name@/logic_app.${MY_POD_NAME}.%d{yyyy-MM-dd}.log</fileNamePattern>
            <!-- 保留 7 天数据，默认无限-->
            <maxHistory>14</maxHistory>
        </rollingPolicy>

        <encoder>
            <pattern>%date{yyyy-MM-dd HH:mm:ss.SSS} @project.name@ ${MY_POD_NAME} %thread %logger{36} %-5level %msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>

    <logger name="com.common.LogPrint" additivity="false" level="INFO">
        <appender-ref ref="logicFile"/>
    </logger>

</included>

根据子项目中Logback的配置，通过LogPrint类打印的日志，都会打印到指定的文件中，不会打印到主项目的日志文件。

核心需要注意的是，子项目的Logback.xml中的配置，需要使用<included> 标签才可以被主项目引入成功。