logback配置实例

<configuration>

	<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
		<encoder>
			<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level - %msg%n</pattern>
		</encoder>
	</appender>


	<appender name="INFOOUT"
		class="ch.qos.logback.core.rolling.RollingFileAppender">
		<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
			<level>INFO</level>
		</filter>
		<file>../log/umap_info.log</file>
		<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
			<!-- Daily rollover -->
			<fileNamePattern>../log/umap_info.%d{yyyy-MM-dd}.log
			</fileNamePattern>
			<!-- Keep 7 days' worth of history
			<maxHistory>7</maxHistory> -->
		</rollingPolicy>

		<encoder>
			<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level - %msg%n</pattern>
		</encoder>
	</appender>

	<appender name="DEBUGOUT"
		class="ch.qos.logback.core.rolling.RollingFileAppender">
		<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
			<level>DEBUG</level>
		</filter>

		<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
			<!-- Daily rollover -->
			<fileNamePattern>../log/umap_debug.%d{yyyy-MM-dd}.log
			</fileNamePattern>
			<!-- Keep 7 days' worth of history
			<maxHistory>7</maxHistory> -->
		</rollingPolicy>

		<encoder>
			<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level - %msg%n</pattern>
		</encoder>
	</appender>

  	<logger name="org.springframework" level="info" />

	<!-- Configure so that it outputs to both console and log file -->
	<root level="DEBUG">
		<appender-ref ref="STDOUT" /> 
		<appender-ref ref="INFOOUT" />
		<appender-ref ref="DEBUGOUT" />
	</root>
</configuration>   

教程：http://www.cnblogs.com/mailingfeng/p/3499436.html