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logback配置

一、例子

<?xml version="1.0" encoding="UTF-8"?><configuration debug="false" scan="false">    <property name="appName" value="phystrixDemo" />       <property name="logbase" value="./logs" />       <contextName>${appName}</contextName>         <appender name="console" class="ch.qos.logback.core.ConsoleAppender">        <encoder>            <pattern>                %d{yyyy-MM-dd HH:mm:ss.SSS},%-5level,%logger{72} - %msg%n            </pattern>        </encoder>    </appender>    <appender name="error" class="ch.qos.logback.core.rolling.RollingFileAppender">        <Encoding>UTF-8</Encoding>        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">            <level>ERROR</level>        </filter>        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">            <fileNamePattern>${logbase}/${appName}/error_%d{yyyy-MM-dd}.%i.log            </fileNamePattern>            <maxHistory>10</maxHistory>            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">                <maxFileSize>5MB</maxFileSize>            </timeBasedFileNamingAndTriggeringPolicy>        </rollingPolicy>        <encoder>            <pattern>                %d{yyyy-MM-dd HH:mm:ss.SSS},%-5level,%logger{72} - %msg%n            </pattern>        </encoder>    </appender>    <appender name="phstrix" class="ch.qos.logback.core.rolling.RollingFileAppender">        <Encoding>UTF-8</Encoding>        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">            <fileNamePattern>${logbase}/${appName}/phstrix_%d{yyyy-MM-dd}.%i.log            </fileNamePattern>            <maxHistory>10</maxHistory>            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">                <maxFileSize>5MB</maxFileSize>            </timeBasedFileNamingAndTriggeringPolicy>        </rollingPolicy>        <encoder>            <pattern>                %d{yyyy-MM-dd HH:mm:ss.SSS},%-5level,%logger{72} - %msg%n            </pattern>        </encoder>    </appender>            <root level="info">        <appender-ref ref="console" />    </root>    <logger name="com.phystrix" level="INFO" additivity="false">        <appender-ref ref="console" />        <appender-ref ref="phstrix" />        <appender-ref ref="error" />    </logger>    <logger name="com.guard.phystrix" level="INFO" additivity="false">        <appender-ref ref="console" />        <appender-ref ref="phstrix" />        <appender-ref ref="error" />    </logger></configuration>

 

二、日志路径

1. logback默认路径为“启动进程”的目录下面,如果程序直接在eclipse里跑,就会输出到eclipse.exe所在的目录下,如果是在tomcat中跑,就会输出到%TOMCAT_HOME%/bin目录下 

2. 配置绝对路径的话,日志就输出到对应的路径,配置相对路径(如:./logs)会输出到默认路径。

 

三、第三方jar包中日志问题

1.logback的上下文环境是一个web应用,且一个应用只有一个日志上下文环境,即应用里的logback起作用,jar包中如果也同时配置了logback,则jar包中的日志不起作用,可通过下面两种方法解决:

a. 可在war包中的logback中添加jar包相应的logger。

b. 或者在jar包中获得root logger:

Logger log = LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);

并且在war包中设置root lever到相应的输出地方

 

2. war包中没配置logback,jar包中配置了logback,则jar包中日志起作用。

 

logback配置