Multi-level filters

<Configuration>    <Appendername= "STDOUT"class= "Ch.qos.logback.core.ConsoleAppender">        <!--Encoders is assigned the type Ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -        <Encoder>            <pattern>%D{HH:MM:SS} [%thread]%-5level%logger{36}-%msg%n</pattern>        </Encoder>    </Appender>    <Loggername= "Cn.zno" Level= "WARN" />    <Root Level= "INFO">        <Appender-refref= "STDOUT" />    </Root></Configuration>

1. <logger name= "Cn.zno" level= "WARN"/>

The role is to configure the Logger class to intercept when A. Trace. Debug message is called.

class testlogback {    privatefinal Logger Logger = Loggerfactory.getlogger (getclass ());     publicvoid  Printlog () {        logger.trace ("It is Trace");        Logger.debug ("It is Debug");        Logger.info ("It is info");        Logger.warn ("It is warn");        Logger.error ("It is Error");}    }

Based on the following code in Ch.qos.logback.classic.Logger.class:

if (Effectivelevelint > level.levelint) {        return;      }

Effectivelevelint possible values are 5000, 10000, 20000, 30000, 40000

Corresponds to 5 levels: Trace, debug, info, warn, error

<logger name= "Cn.zno" level= "WARN"/> such as WARN value of 30000, greater than info debug trace, will only output WARN error

2. <root level= ""/>

Can only have one root, can be inherited by multiple appender, can affect the value of effectivelevelint, to <logger-based

If <root is considered a parent class, then <logger is the subclass

If the subclass does not specify this value, the parent class will prevail

If the child class specifies the value, the subclass is the subject of the

Multi-level filters