日志框架的使用配置 log4j

1，要先导包

2，在src下面写一个.xml文件

log4j.xml的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
 <properties>
        <property name="LOG_HOME">D:/logs</property>
        <property name="FILE_NAME">mylog</property>
    </properties>


    <Appenders>
    
        <!--输出到控制台-->
        <Console name="STDOUT" target="SYSTEM_OUT">
            <PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
        </Console>
        
        <!--不停递增内容的文件-->
        <File name="FileAppender" fileName="D:/logs/app.log">  
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />  
        </File>  
     
        
        <!--可滚动的文件-->
        <RollingRandomAccessFile name="RollingRandomAccessFile  fileName="${LOG_HOME}/${FILE_NAME}.log" filePattern="${LOG_HOME}/$${date:yyyy-MM}/${FILE_NAME}-%d{yyyy-MM-dd HH-mm}-%i.log">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
            <Policies>
                <TimeBasedTriggeringPolicy interval="1"/>
                <SizeBasedTriggeringPolicy size="10 MB"/>
            </Policies>
            <DefaultRolloverStrategy max="20"/>
        </RollingRandomAccessFile>
    </Appenders>
    
    
    <Loggers>
        <Logger name="com.opensymphony.xwork2" level="debug"/>
        <Logger name="org.apache.struts2" level="debug"/>
        <Root level="warn">
            <AppenderRef ref="STDOUT"/>
        </Root>
    </Loggers>
</Configuration>