log4j.xml简介

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

    <appender name="ERRORFILE" class="org.apache.log4j.ConsoleAppender">
        <param name="Threshold" value="ERROR" />
        <param name="File" value="F:/error.log" />
        <param name="MaxFileSize" value="2000MB"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
        </layout>
    </appender>

    <appender name="WELCOMEFILE" class="org.apache.log4j.RollingFileAppender">
        <param name="Threshold" value="INFO" />
        <param name="File" value="F:/welcome.log" />
        <!-- 日志文件允许的最大字节数（默认是10M） -->
        <param name="MaxFileSize" value="2000MB"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
        </layout>
        <!--过滤器设置输出的级别,只能记录INFO和WARN级别的日志-->  
        <filter class="org.apache.log4j.varia.LevelRangeFilter">  
            <param name="levelMin" value="INFO" />  
            <param name="levelMax" value="WARN" />  
            <param name="AcceptOnMatch" value="true" />  
        </filter>  
    </appender>

    <logger name="org.apache.commons.httpclient">
        <level value="ERROR" />
    </logger>

    <!-- 这里虽然定义了DEBUG级别，但是由于WELCOMEFILE定义的是INFO级别，所以在WELCOMEFILE中我们能看到的也都是INFO级别的日志 -->
    <logger name="com.dan.test">
        <level value="DEBUG" />
        <appender-ref ref="WELCOMEFILE" />
    </logger>
    
    <root>
        <level value="ERROR" />
        <appender-ref ref="ERRORFILE" />
        <appender-ref ref="WELCOMEFILE" />
    </root>

</log4j:configuration>