log4j2日志配置实例

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- 共有8个级别，按照从低到高为：ALL < TRACE < DEBUG < INFO < WARN < ERROR < FATAL < OFF -->
<!-- status指定log4j本身的打印日志的级别 -->
<Configuration status="WARN">

	<Properties>
		<Property name="base.package">com.example.demo</Property>
		<Property name="log.level">${sys:log4j.log.level:-DEBUG}</Property>
		<Property name="logfile.path">${sys:log4j.logfile.path:-/data/logs/access}/@artifactId@</Property>
		<Property name="logfile.arch.path">${sys:log4j.logfile.path:-/data/logs/access}/@artifactId@/${date:yyyy-MM}</Property>
		<Property name="logfile.arch.suffix">%d{yyyy-MM-dd}-%i.log.gz</Property>
		<Property name="logout.pattern">%d{yyyy-MM-dd HH:mm:ss.SSS} %highlight{%5p} ${sys:PID} --- [%15.15t] %-40.40c{1.} : %m%n</Property>
		<Property name="logfile.pattern">%d{yyyy-MM-dd HH:mm:ss.SSS} %5p [%t] &lt;%c&gt; : %m%n</Property>
		<Property name="timestamp.pattern">%d{yyyy-MM-dd HH:mm:ss.SSS}{GMT+0}</Property>
	</Properties>

	<Appenders>
		<Console name="STDOUT" target="SYSTEM_OUT">
			<ThresholdFilter level="ERROR" onMatch="DENY" onMismatch="ACCEPT" />
			<PatternLayout pattern="${logout.pattern}"/>
		</Console>
		<Console name="STDERR" target="SYSTEM_ERR">
			<ThresholdFilter level="ERROR" onMatch="ACCEPT" onMismatch="DENY" />
			<PatternLayout pattern="${logout.pattern}"/>
		</Console>

		<RollingRandomAccessFile name="SERVICE_LOG_FILE" fileName="${logfile.path}/service.log"
								 filePattern="${logfile.arch.path}/service-${logfile.arch.suffix}">
			<PatternLayout pattern="${logfile.pattern}"/>
			<Policies>
				<!-- 基于时间的滚动策略(interval属性). The default value is 1. -->
				<TimeBasedTriggeringPolicy />
				<!-- 基于文件大小的滚动策略(size属性)：SizeBasedTriggeringPolicy -->
			</Policies>
			<!-- 用来指定同一个文件夹下最多有几个日志文件时开始删除最旧的，创建新的(通过max属性). The default value is 7. -->
			<DefaultRolloverStrategy />
		</RollingRandomAccessFile>

	</Appenders>

	<Loggers>
		<!-- Root Logger -->
		<Root level="INFO">
			<AppenderRef ref="STDOUT"/>
			<AppenderRef ref="STDERR"/>
			<AppenderRef ref="SERVICE_LOG_FILE" />
		</Root>

		<!-- additivity="false"只在自定义的Appender中进行输出 -->
		<!-- Base Logger -->
		<Logger name="${base.package}" level="${log.level}"></Logger>

		<!-- 可通过该配置输出到单独的文件 -->
		<!-- 可通过 LoggerFactory.getLogger("syncGuestInfoLog"); 直接获取该日志对象 -->
		<Logger name="syncGuestInfoLog" level="${log.level}" additivity="false">
			<AppenderRef ref="" />
		</Logger>

	</Loggers>
	
</Configuration>