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

<log4j:configuration debug="true" xmlns:log4j="http://jakarta.apache.org/log4j/">
    
    <appender name="ApplicationLog"  class ="org.apache.log4j.DailyRollingFileAppender">
        <param name="File" value="logs/kis2.log"/>
        <param name="DatePattern" value="yyyy-MM-dd"/>
        <layout  class ="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d %-5p - %m%n"/>
        </layout>
    </appender>
    
    <category name="kis2"> <!-- это пакет-->
        <priority value="info"/>
    </category>
    
    <root>
        <priority value = "info"/>
        <appender-ref ref = "ApplicationLog"/>
    </root>
</log4j:configuration>

 public   class  LogServlet  extends  HttpServlet {
     private   final  String CONFIGFILE_LOG4J = "WEB-INF/log4j.xml";
    
     public   void  init()  throws  ServletException {
        String prefix = getServletContext().getRealPath("/");
        DOMConfigurator.configure(prefix + CONFIGFILE_LOG4J);
    }
}

log = Logger.getLogger( this .getClass());
log.info("test");