package com.baeldung.extensions; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class SpringBootLogbackExtensionsApplication { private static final Logger logger = LoggerFactory.getLogger(SpringBootLogbackExtensionsApplication.class); public static void main(String[] args) { SpringApplication.run(SpringBootLogbackExtensionsApplication.class, args); logger.debug("Debug log message"); logger.info("Info log message"); logger.error("Error log message"); logger.warn("Warn log message"); logger.trace("Trace log message"); } }