Spring Logging for Spring 5.1 - All Java Configuration

mylogger.properties

#
# Set the application logging levels
# - For more detailed logs, set leves to FINEST
# - For info on logging levels, see: http://www.vogella.com/tutorials/Logging/article.html
#
root.logger.level=FINE
printed.logger.level=FINE

MyLoggerConfig.java

package com.luv2code.springdemo;

import java.util.logging.ConsoleHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.logging.SimpleFormatter;

import javax.annotation.PostConstruct;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

@Configuration
@PropertySource("classpath:mylogger.properties")
public class MyLoggerConfig {

	@Value("${root.logger.level}")
	private String rootLoggerLevel;

	@Value("${printed.logger.level}")
	private String printedLoggerLevel;
	
	@PostConstruct
	public void initLogger() {

		// parse levels
		Level rootLevel = Level.parse(rootLoggerLevel);
		Level printedLevel = Level.parse(printedLoggerLevel);
		
		// get logger for app context
		Logger applicationContextLogger = Logger.getLogger(AnnotationConfigApplicationContext.class.getName());

		// get parent logger
		Logger loggerParent = applicationContextLogger.getParent();

		// set root logging level
		loggerParent.setLevel(rootLevel);
		
		// set up console handler
		ConsoleHandler consoleHandler = new ConsoleHandler();
		consoleHandler.setLevel(printedLevel);
		consoleHandler.setFormatter(new SimpleFormatter());
		
		// add handler to the logger
		loggerParent.addHandler(consoleHandler);
	}
	
}