Log4j using XML configuration.

Please follow the following program to understand log4j implementation using xml file.

Here I have used console appender to log the events.

Java : XMLConfigurationDemo

import org.apache.log4j.Logger;

import org.apache.log4j.xml.DOMConfigurator;

public class XMLConfigurationDemo {

      private static final Logger logger = Logger.getLogger(XMLConfigurationDemo.class);

      public static void main(String[] args) {

            DOMConfigurator.configure("log.xml");

            logger.trace("Trace Message.");// Point to Point.

            logger.debug("Debug Message.");// Method to Method.

      }

}

XML:log.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="Console" class="org.apache.log4j.ConsoleAppender">

            <layout class="org.apache.log4j.PatternLayout">

                  <param name="ConversionPattern" value="%p %c - %m%n" />

            </layout>

      </appender>

      <root>

            <level value="trace" />

            <appender-ref ref="Console" />

      </root>

</log4j:configuration>