log4j2使用

Step-by-step guide

1.  配置mavn依賴（要兼容以前的版本需要添加額外橋接器）

   <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-api</artifactId>
      <version>2.7</version>
     </dependency>
     <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-core</artifactId>
      <version>2.7</version>
     </dependency>

2. 配置log4j2.xml

   <?xml version="1.0" encoding="UTF-8"?>
   <configuration status="off">
    <Properties>
     <Property name="logDataDir">${deploy.dir}/logData</Property>
     <Property name="unite">unite</Property>
     <Property name="root">root</Property>
    </Properties>
    <appenders>

    <!--控制檯輸出-->
     <Console name="console" target="SYSTEM_OUT">
      <PatternLayout>
       <Pattern>%d{yyyy-MM-dd HH:mm:ss} %level %l %t [%msg]%n</Pattern>
      </PatternLayout>
     </Console>
        <RollingRandomAccessFile name="uniteAppender" fileName="${logDataDir}/${unite}.txt"
                    filePattern="${logDataDir}/${unite}.%d{yyyy-MM-dd}.%i.bk.txt">
           <PatternLayout>
             <Pattern>%msg%n</Pattern>
           </PatternLayout>
           <Policies>
             <TimeBasedTriggeringPolicy />//按時間切分
             <SizeBasedTriggeringPolicy size="512 MB"/>//按大小切分
           </Policies>
           <DefaultRolloverStrategy>
       <Delete basePath="${logDataDir}" maxDepth="1">
          <IfFileName glob="${common}.*.bk.txt" /> //glob模式匹配
          <IfLastModified age="7d" /> //刪除七天前日誌
         </Delete>
        </DefaultRolloverStrategy>
        </RollingRandomAccessFile>
    </appenders>
    <loggers>
        <Logger level="info" name="uniteLogger" additivity="false">
      <appender-ref ref="uniteAppender" />
     </Logger>
     <root level="info">
      <appender-ref ref="console" />
     </root>
    </loggers>
   </configuration>

3. 使用

          private Logger logger = LogManager.getLogger(DataReceiveController.class);