Spring Boot使用Logback将某些日志输出到单独的文件

缘起

重构了某个接口，想监控下新接口各个处理过程的时间，从而评估和监控日常性能。监控使用Spring自带的StopWatch，日志使用Logback

配置

先拷贝一份infoAppender配置过来改个名

  <!-- 监控日志 --><appender name="monitorAppender"class="ch.qos.logback.core.rolling.RollingFileAppender"><file>${log.dir}/logs/${project_name}_monitor.log</file><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><fileNamePattern>${log.dir}/logs/${project_name}_monitor_%d{yyyy-MM-dd}.log</fileNamePattern><maxHistory>7</maxHistory></rollingPolicy><encoder charset="UTF-8"><pattern>${MONITOR_PATTERN}</pattern></encoder></appender>

添加单独的logger配置

    <logger name="monitorLogger"><appender-ref ref="monitorAppender" /></logger>

代码里面获取一下这个monitorLogger，然后输出就好了

//获取
private static Logger monitorLogger = LoggerFactory.getLogger("monitorLogger");
//使用
monitorLogger.info(stopWatch.prettyPrint(TimeUnit.MILLISECONDS));

完整配置参考

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false" scan="false"><property name="project_name" value="xxx"/><property name="log.dir" value="/log/xxx"/> <property name="MONITOR_PATTERN"value="[%d{yyyy-MM-dd HH:mm:ss.SSS}]-[%X{EagleEye-TraceID}][%thread]-[%-5level]-[%logger{50}:%L] - %msg%n"/><appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"><target>System.out</target><encoder charset="UTF-8"><pattern>${MONITOR_PATTERN}</pattern></encoder></appender><appender name="infoAppender"class="ch.qos.logback.core.rolling.RollingFileAppender"><file>${log.dir}/logs/${project_name}_info.log</file><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><fileNamePattern>${log.dir}/logs/${project_name}_info_%d{yyyy-MM-dd}.log</fileNamePattern><maxHistory>7</maxHistory></rollingPolicy><encoder charset="UTF-8"><pattern>${MONITOR_PATTERN}</pattern></encoder></appender><!-- 监控日志 --><appender name="monitorAppender"class="ch.qos.logback.core.rolling.RollingFileAppender"><file>${log.dir}/logs/${project_name}_monitor.log</file><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><fileNamePattern>${log.dir}/logs/${project_name}_monitor_%d{yyyy-MM-dd}.log</fileNamePattern><maxHistory>7</maxHistory></rollingPolicy><encoder charset="UTF-8"><pattern>${MONITOR_PATTERN}</pattern></encoder></appender><appender name="errorAppender"class="ch.qos.logback.core.rolling.RollingFileAppender"><file>${log.dir}/logs/${project_name}_error.log</file><filter class="ch.qos.logback.classic.filter.ThresholdFilter"><level>ERROR</level></filter><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><fileNamePattern>${log.dir}/logs/${project_name}_error_%d{yyyy-MM-dd}.log</fileNamePattern><maxHistory>7</maxHistory></rollingPolicy><encoder charset="UTF-8"><pattern>${MONITOR_PATTERN}</pattern></encoder></appender><logger name="monitorLogger"><appender-ref ref="monitorAppender" /></logger><root><level value="INFO"/>
<!--        <appender-ref ref="STDOUT"/>--><appender-ref ref="infoAppender"/><appender-ref ref="errorAppender"/></root></configuration>