Question

请在下面找到我的log4.xml配置，用于滚动文件appender

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

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


    <appender name="instrumentationAppender" class="org.apache.log4j.RollingFileAppender">
       <param name="file" value="C:\\Users\\Test\\Downloads\\Testlogs\\instrumentation.log"/>
        <param name="Append" value="true" />
        <param name="Encoding" value="UTF-8" />
        <param name="MaxFileSize" value="100KB"/>
        <param name="MaxBackupIndex" value="10"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d %-5p [%t] (%C:%L) - %m%n"/>
        </layout>
          <filter class="org.apache.log4j.varia.LevelRangeFilter">
            <param name="LevelMin" value="INFO" />
            <param name="LevelMax" value="INFO" />
            <param name="AcceptOnMatch" value="true" />
        </filter>
    </appender>


    <appender name="debugAppender" class="org.apache.log4j.RollingFileAppender">
       <param name="file" value="C:\\Users\\Test\\Downloads\\Testlogs\\Test.log"/>
        <param name="Append" value="true" />
        <param name="Encoding" value="UTF-8" />
        <param name="MaxFileSize" value="100KB"/>
        <param name="MaxBackupIndex" value="10"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d %-5p [%t] (%C:%L) - %m%n"/>
        </layout>
        <param name="ImmediateFlush" value="true" />
          <filter class="org.apache.log4j.varia.LevelRangeFilter">
            <param name="LevelMin" value="DEBUG" />
            <param name="LevelMax" value="DEBUG" />
            <param name="AcceptOnMatch" value="true" />
        </filter>
    </appender>

      <appender name="errorAppender" class="org.apache.log4j.RollingFileAppender">
       <param name="file" value="C:\\Users\\Test\\Downloads\\Testlogs\\Test.log"/>
        <param name="Append" value="true" />
        <param name="Encoding" value="UTF-8" />
        <param name="MaxFileSize" value="100KB"/>
        <param name="MaxBackupIndex" value="10"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d %-5p [%t] (%C:%L) - %m%n"/>
        </layout>
          <filter class="org.apache.log4j.varia.LevelRangeFilter">
            <param name="LevelMin" value="ERROR" />
            <param name="LevelMax" value="FATAL" />
            <param name="AcceptOnMatch" value="true" />
        </filter>
    </appender>

    <category name="com.practice.Test" additivity="false">
        <priority value="DEBUG"/>
        <appender-ref ref="instrumentationAppender" />
        <appender-ref ref="debugAppender" />
        <appender-ref ref="errorAppender" />
    </category>

问题是instrumentationAppender，debugAppender和errorAppender由com.practice pakaage引用，如上面所定义。在所有appender中，maxFileSize为100kb并配置为Test.log文件。问题Test.log文件在100kb大小后不会翻转。所有日志都会附加到同一个Test.log文件中。如何根据大小配置RollingAppender？

提前感谢您的帮助。

Answer 1

特此回答我自己的问题。希望它会有用。

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

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


  <appender name="instrumentationAppender" class="org.apache.log4j.RollingFileAppender">
       <param name="file" value="C:\\Users\\Test\\Downloads\\Testlogs\\instrumentation.log"/>
        <param name="Append" value="true" />
        <param name="Encoding" value="UTF-8" />
        <param name="MaxFileSize" value="100KB"/>
        <param name="MaxBackupIndex" value="10"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d %-5p [%t] (%C:%L) - %m%n"/>
        </layout>
         <filter class="org.apache.log4j.varia.LevelMatchFilter">
            <param name="LevelToMatch" value="INFO" />
            <param name="AcceptOnMatch" value="true" />
        </filter>
        <filter class="org.apache.log4j.varia.DenyAllFilter" />  
    </appender>


    <appender name="debugAppender" class="org.apache.log4j.RollingFileAppender">
       <param name="file" value="C:\\Users\\Test\\Downloads\\Testlogs\\Test.log"/>
        <param name="Append" value="true" />
        <param name="Encoding" value="UTF-8" />
        <param name="MaxFileSize" value="100KB"/>
        <param name="MaxBackupIndex" value="10"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d %-5p [%t] (%C:%L) - %m%n"/>
        </layout>
        <param name="ImmediateFlush" value="true" />
          <filter class="org.apache.log4j.varia.LevelMatchFilter">
              <param name="LevelToMatch" value="DEBUG" />
             <param name="AcceptOnMatch" value="true" />
        </filter>
        <filter class="org.apache.log4j.varia.LevelMatchFilter">
              <param name="LevelToMatch" value="ERROR" />
             <param name="AcceptOnMatch" value="true" />
        </filter>
         <filter class="org.apache.log4j.varia.LevelMatchFilter">
              <param name="LevelToMatch" value="WARN" />
             <param name="AcceptOnMatch" value="true" />
        </filter>
        <filter class="org.apache.log4j.varia.LevelMatchFilter">
              <param name="LevelToMatch" value="FATAL" />
             <param name="AcceptOnMatch" value="true" />
        </filter>
        <filter class="org.apache.log4j.varia.DenyAllFilter" />     
    </appender>


    <category name="com.practice.Test" additivity="false">
        <priority value="DEBUG"/>
        <appender-ref ref="instrumentationAppender" />
        <appender-ref ref="debugAppender" />
     </category>

    </log4j:configuration>

解决方案是代替不同日志级别的多个appender映射到同一个文件，添加LevelMatchFilter，如上所述，以匹配不同的日志级别到同一个文件。

Answer 2

# Set the maximum file size before rollover
log4j.appender.FILE.MaxFileSize=100KB

# Set the the backup index
log4j.appender.FILE.MaxBackupIndex=2

如果你设置它将保留备份文件，直到你在该属性中提到的。

log4j.xml基于大小滚动Appender

2 个答案: