Log4j Simple xml configuration example

1. Add below dependency in your project

<dependency>
 <groupid>log4j</groupid>
 <artifactid>log4j</artifactid>
 <version>1.2.17</version>
</dependency>

2. Create a log4j.xml file

<log4j:configuration debug="true" xmlns:log4j="http://jakarta.apache.org/log4j/">
 
   <appender name="consoleAppender" class="org.apache.log4j.ConsoleAppender">
      <layout class="org.apache.log4j.PatternLayout">
         <param name="ConversionPattern" value="%d{dd MMM yyyy HH:mm:ss} %5p %c{1} - %m%n">
      </layout>
   </appender>
 
   <appender name="fileAppender" class="org.apache.log4j.RollingFileAppender">
      <param name="append" value="false">
      <param name="file" value="mylog.log">
      <layout class="org.apache.log4j.PatternLayout">
         <param name="ConversionPattern" value="%d{ABSOLUTE} %-5p [%c{1}] %m%n">
      </layout>
   </appender>
 
   <root>
      <level value="INFO">
      <appender-ref ref="consoleAppender">
      <appender-ref ref="fileAppender">
   </appender-ref></appender-ref></level></root>
  </log4j:configuration>

This should place in your resource folder

3. Create a main class to test

package com.vinod.test;

import org.apache.log4j.Logger;
public class Log4jTest {
  static Logger logger = Logger
             .getLogger(Log4jTest.class.getName());
 public static void main(String[] args) {
        logger.info("Info test");
        logger.debug("Debug test");
 }

}

4. Ouput - mylog.log

 23:32:01,101 INFO [Log4jTest] Info test