tests/input/filter/simpleFilter2.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration >

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

  <appender name="A1" class="org.apache.log4j.FileAppender">
    <param name="Append" value="false" />
    <param name="File"   value="temp" />
    <layout class="org.apache.log4j.PatternLayout">
      <param name="ConversionPattern"
             value="%-5p %c{2} - %m\n"/>
    </layout>
    <!-- Reject all LoggingEvents containing the string
         "1" in the message field. -->
    <filter class="org.apache.log4j.filter.StringMatchFilter">
      <param name="StringToMatch" value="1" />
      <param name="AcceptOnMatch" value="false" />
    </filter>
  </appender>
  
  <root>
    <appender-ref ref="A1" />	       
  </root>
</configuration>