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Log4j example using log4j properties file

Let us discuss the use of Log4j with the help of below example. In this example we use log4j.properties file for Log4j configurations.

Example:

Log4jTest.java

import org.apache.log4j.Logger;
 
/**
 * This class is used to show the use of 
 * Log4j with the log4j.properties file.
 * @author codesjava
 */
public class Log4jTest {
	//Get the Logger object.
	private static Logger log = Logger.getLogger(Log4jTest.class);
 
	public static void main(String[] args) {	
		//logger messages
		log.debug("Log4j debug message test.");
		log.info("Log4j info message test.");		
	}
}

log4j.properties

#log4j.rootCategory=INFO,DEBUG,A1,LFS
log4j.rootLogger=DEBUG, CA
 
#Set Console Appender
log4j.appender.CA=org.apache.log4j.ConsoleAppender
#CA uses PatternLayout
log4j.appender.CA.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%m%n

Output:

Log4j debug message test.
Log4j info message test.

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