springboot 2.1.4 源码默认logback-spring.xml

logback-spring.xml 是由几个文件组成的，整个的一个xml为

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
	<conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter" />
	<conversionRule conversionWord="wex" converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter" />
	<conversionRule conversionWord="wEx" converterClass="org.springframework.boot.logging.logback.ExtendedWhitespaceThrowableProxyConverter" />

	<property name="CONSOLE_LOG_PATTERN" value="${CONSOLE_LOG_PATTERN:-%clr(%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>
	<property name="FILE_LOG_PATTERN" value="${FILE_LOG_PATTERN:-%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}} ${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] %-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>
	<property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}}/spring.log}"/>

	<logger name="org.apache.catalina.startup.DigesterFactory" level="ERROR"/>
	<logger name="org.apache.catalina.util.LifecycleBase" level="ERROR"/>
	<logger name="org.apache.coyote.http11.Http11NioProtocol" level="WARN"/>
	<logger name="org.apache.sshd.common.util.SecurityUtils" level="WARN"/>
	<logger name="org.apache.tomcat.util.net.NioSelectorPool" level="WARN"/>
	<logger name="org.eclipse.jetty.util.component.AbstractLifeCycle" level="ERROR"/>
	<logger name="org.hibernate.validator.internal.util.Version" level="WARN"/>

	<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
		<encoder>
			<pattern>${CONSOLE_LOG_PATTERN}</pattern>
		</encoder>
	</appender>

	<appender name="FILE"
		class="ch.qos.logback.core.rolling.RollingFileAppender">
		<encoder>
			<pattern>${FILE_LOG_PATTERN}</pattern>
		</encoder>
		<file>${LOG_FILE}</file>
		<rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
			<cleanHistoryOnStart>${LOG_FILE_CLEAN_HISTORY_ON_START:-false}</cleanHistoryOnStart>
			<fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.%i.gz</fileNamePattern>
			<maxFileSize>${LOG_FILE_MAX_SIZE:-10MB}</maxFileSize>
			<maxHistory>${LOG_FILE_MAX_HISTORY:-0}</maxHistory>
			<totalSizeCap>${LOG_FILE_TOTAL_SIZE_CAP:-0}</totalSizeCap>
		</rollingPolicy>
	</appender>

	<root level="INFO">
		<appender-ref ref="CONSOLE" />
		<appender-ref ref="FILE" />
	</root>
	<logger name="sample.logback" level="DEBUG" />
	<springProfile name="staging">
		<logger name="sample.logback" level="TRACE" />
	</springProfile>
</configuration>