Configure Log4j in Java by using properties/xml file

Put log4j.xml or log4j.xml file in the resource folder

2019-07-30 16:00:09 DEBUG Log4jXmlConfigurationExample:18 - Log4j appender configuration is successful !!

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	# Root logger option
	log4j.rootLogger=DEBUG, stdout, file
	# Redirect log messages to console
	log4j.appender.stdout=org.apache.log4j.ConsoleAppender
	log4j.appender.stdout.Target=System.out
	log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
	log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
	# Redirect log messages to a log file, support file rolling.
	log4j.appender.file=org.apache.log4j.RollingFileAppender
	log4j.appender.file.File=C:\\Users\\diya-mutturajh\\test123\\Logs\\log4j-application.log
	log4j.appender.file.MaxFileSize=5MB
	log4j.appender.file.MaxBackupIndex=10
	log4j.appender.file.layout=org.apache.log4j.PatternLayout
	log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n

view raw log4j.proparties hosted with ❤ by GitHub

	<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
	<log4j:configuration debug="true"
	xmlns:log4j='http://jakarta.apache.org/log4j/'>
	<appender name="console"
	class="org.apache.log4j.ConsoleAppender">
	<param name="Target" value="System.out" />
	<layout class="org.apache.log4j.PatternLayout">
	<param name="ConversionPattern"
	value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n" />
	</layout>
	</appender>
	<appender name="fileAppender"
	class="org.apache.log4j.RollingFileAppender">
	<param name="File" value="demoApplication.log" />
	<layout class="org.apache.log4j.PatternLayout">
	<param name="ConversionPattern"
	value="%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n" />
	</layout>
	</appender>
	<root>
	<priority value="debug"></priority>
	<appender-ref ref="console"></appender-ref>
	<appender-ref ref="fileAppender"></appender-ref>
	</root>
	</log4j:configuration>

view raw log4j.xml hosted with ❤ by GitHub

	package test1231;
	import org.apache.log4j.Logger;
	import org.apache.log4j.xml.DOMConfigurator;
	public class Log4JExample
	{
	static Logger logger = Logger.getLogger(Log4JExample.class);
	public static void main(String[] args)
	{
	//DOMConfigurator is used to configure logger from xml configuration file
	DOMConfigurator.configure("C:\\Users\\mutturajh\\test123\\src\\test\\java\\test1231\\log4j.xml");
	//Log in console in and log file
	logger.debug("Log4j appender configuration is successful !!");
	}
	}

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