6、log4j.xml 文件说明

1、优先级

     和  log4j.properties 同时存在的情况下，log'日志执行 依据 以 xml 文件 为准（log4j.xml  优先于  log4j.properties ）

 

2、优势

     filter精确匹配，避免往后靠的大于等于，可以 OnlyOne过滤出我需要的

　　additivity="false"精确匹配，停止传播

 

3、log4j.xml

　　

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

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

     <appender name="log.console" class="org.apache.log4j.ConsoleAppender" >
           <layout class= "org.apache.log4j.PatternLayout" >
               <param name= "ConversionPattern" value="%d{HH:mm:ss,SSS} %5p (%C:%M) - %m%n" />
           </layout>
          
        <!-- 打印时 根据 最小范围 到 最大 范围  -->
           <filter class="org.apache.log4j.varia.LevelRangeFilter" >
                    <param name= "levelMin"       value ="debug" />
                    <param name= "levelMax"       value ="warn" />
                    <param name= "AcceptOnMatch" value="true" />
           </filter>
          
     </appender >

     <appender name="log.file" class="org.apache.log4j.DailyRollingFileAppender" >
           <param name= "File"           value="D:\\xiaozhi4XML.log" />
           <param name= "Append"         value="true" />
           <param name= "DatePattern"      value ="'.'yyyy-MM-dd" />
           <layout class= "org.apache.log4j.PatternLayout" >
               <param name= "ConversionPattern" value="%d{HH:mm:ss,SSS} %5p (%C{1}:%M) - %m%n" />
           </layout>
     </appender >
     
     <!--additivity="false"  防止传递，比如 多个数据源，输出的日志会是多余设定的，有重复的-->
     <logger name="com.xiaozhi" additivity="false" >
           <level value= "debug" />
           <appender-ref ref= "log.console" />
           <appender-ref ref= "log.file" />
     </logger >
     
      <!--
     <logger name="com.xiaozhi.dao" additivity="false">
          <level value="error" />
          <appender- ref ref ="log.console" />
          <appender- ref ref ="log.file" />
     </logger>-->
     
     
     <root >
           <level value= "debug" />
           <appender-ref ref= "log.console" />
           <appender-ref ref= "log.file" />
     </root >   
 

</log4j:configuration>