logger.level = DEBUG appender.console = com.example.ConsoleAppender appender.console.layout = com.example.SimpleLayout appender.file = com.example.FileAppender appender.file.layout = com.example.PatternLayout appender.database = com.example.DatabaseAppender appender.database.layout = com.example.JsonLayout import com.example.Logger; import com.example.LoggerFactory; public class MyApp { private static final Logger logger = LoggerFactory.getLogger(MyApp.class); public static void main(String[] args) { logger.debug("This is a debug message."); logger.info("This is an info message."); logger.warn("This is a warning message."); logger.error("This is an error message."); } }