log4j2 自定义配置文件，java载入

http://logging.apache.org/log4j/2.x/faq.html#separate_log_files

How do I reconfigure log4j2 in code with a specific configuration file?

See the below example. Be aware that this LoggerContext class is not part of the public API so your code may break with any minor release.

1. // import org.apache.logging.log4j.core.LoggerContext;
2. LoggerContext context = (org.apache.logging.log4j.core.LoggerContext) LogManager.getContext(false);
3. File file = new File("path/to/a/different/log4j2.xml");
4. // this will force a reconfiguration
5. context.setConfigLocation(file.toURI());

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
     status="debug" monitorInterval="1800"
     <properties>
        <property name="LOG_HOME">E://stats_collector_logs</property>
        <!-- 日志备份目录 -->
        <property name="BACKUP_HOME">{LOG_HOME}/backup</property>
        <property name="STAT_NAME">log</property>
    </properties>  

    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
           <PatternLayout pattern="%m%n"/>
        </Console>
        <File name="MyFile" fileName="/stats">
             <PatternLayout pattern="- %msg%n" />
        </File>  

         <!-- STB发来的播放日志 -->
        <RollingRandomAccessFile name="playLogAppender"
            fileName="${LOG_HOME}/play_${STAT_NAME}_"
            filePattern="${LOG_HOME}/play_${STAT_NAME}_%d{yyyy_MM_dd_HH_mm}.log">
            <PatternLayout
                pattern="%msg%n" />
            <Policies>
                <TimeBasedTriggeringPolicy interval="1"
                    modulate="true" />
            </Policies>
        </RollingRandomAccessFile>  

         <!-- STB发来的播放日志 -->
        <RollingRandomAccessFile name="viewLogAppender"
            fileName="${LOG_HOME}/view_${STAT_NAME}_"
            filePattern="${LOG_HOME}/view_${STAT_NAME}_%d{yyyy_MM_dd_HH_mm}.log">
            <PatternLayout
                pattern="%msg%n" />
            <Policies>
                <TimeBasedTriggeringPolicy interval="1"
                    modulate="true" />
            </Policies>
        </RollingRandomAccessFile>  

   <!--interval，integer型，指定两次封存动作之间的时间间隔。单位:以日志的命名精度来确定单位，比如yyyy-MM-dd-HH 单位为小时，yyyy-MM-dd-HH-mm 单位为分钟-->
   <!--modulate，boolean型，说明是否对封存时间进行调制。若modulate=true，则封存时间将以0点为边界进行偏移计算。比如，modulate=true，interval=4hours，那么假设上次封存日志的时间为03:00，则下次封存日志的时间为04:00，之后的封存时间依次为08:00，12:00，16:00，。。。-->
      <!-- 程序员调试日志 -->
        <RollingRandomAccessFile name="DevLog" fileName="${LOG_HOME}/${SERVER_NAME}"
            filePattern="${LOG_HOME}/${SERVER_NAME}.%d{yyyy-MM-dd-HH}.log">
            <PatternLayout pattern="%date{yyyy-MM-dd HH:mm:ss.SSS} %level [%thread][%file:%line] - %msg%n" />
            <Policies>
                <TimeBasedTriggeringPolicy interval="1" modulate="true" />
            </Policies>
        </RollingRandomAccessFile>
        <!-- 游戏产品数据分析日志 -->
        <RollingRandomAccessFile name="ProductLog"
            fileName="${LOG_HOME}/${SERVER_NAME}_${STAT_NAME}"
            filePattern="${LOG_HOME}/${SERVER_NAME}_${STAT_NAME}.%d{yyyy-MM-dd-HH}.log">
            <PatternLayout
                pattern="%date{yyyy-MM-dd HH:mm:ss.SSS} %level [%thread][%file:%line] - %msg%n" />
            <Policies>
                <TimeBasedTriggeringPolicy interval="1"
                    modulate="true" />
            </Policies>
        </RollingRandomAccessFile>  

         <!--文件会打印出所有信息，这个log每次运行程序会自动清空，由append属性决定，这个也挺有用的，适合临时测试用-->
         <File name="log" fileName="log/test.log" append="false">
            <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/>
        </File>

        <!--这个会打印出所有的信息，每次大小超过size，则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩，作为存档-->
        <RollingFile name="RollingFile" fileName="logs/app.log"
                     filePattern="log/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz">
            <PatternLayout pattern="%d{yyyy-MM-dd 'at' HH:mm:ss z} %-5level %class{36} %L %M - %msg%xEx%n"/>
            <SizeBasedTriggeringPolicy size="50MB"/>
        </RollingFile>

          <File name="ERROR" fileName="logs/error.log">
            <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="%d{yyyy.MM.dd 'at' HH:mm:ss z} %-5level %class{36} %L %M - %msg%xEx%n"/>
        </File>

    </Appenders>
    <Loggers>
        <Logger name="PLAY_LOG" level="trace" additivity="false">
            <AppenderRef ref="playLogAppender" />
        </Logger>
        <Logger name="VIEW_LOG" level="trace" additivity="false">
            <AppenderRef ref="viewLogAppender" />
        </Logger>
       <Root level="debug">
                    <AppenderRef ref="Console"/>
            </Root>
    </Loggers>
</Configuration>