JAVA高级面试进阶训练营视频教程

admin

说明：这种方式应该算是最通用的，原理是通过判断标签实现。

   <!-- if-then form -->
   <if condition="some conditional expression">
    <then>
      ...
    </then>
  </if>
  
  <!-- if-then-else form -->
  <if condition="some conditional expression">
    <then>
      ...
    </then>
    <else>
      ...
    </else>    
  </if>

不过判断条件需要依赖Janino library

<configuration debug="true">

  <if condition='property("HOSTNAME").contains("torino")'>
    <then>
      <appender name="CON" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
          <pattern>%d %-5level %logger{35} - %msg %n</pattern>
        </encoder>
      </appender>
      <root>
        <appender-ref ref="CON" />
      </root>
    </then>
  </if>

  <appender name="FILE" class="ch.qos.logback.core.FileAppender">
    <file>${randomOutputDir}/conditional.log</file>
    <encoder>
      <pattern>%d %-5level %logger{35} - %msg %n</pattern>
   </encoder>
  </appender>

  <root level="ERROR">
     <appender-ref ref="FILE" />
  </root>
</configuration>

 

参考：

https://logback.qos.ch/manual/configuration.html#conditional（官方参考文档）