html.properties: configuring the custom logger
log4j.logger.com.apress.logging.log4j=DEBUG, FILE log4j.appender.FILE=org.apache.log4j.FileAppender log4j.appender.FILE.File=htmlLayout.html log4j.appender.FILE.layout=org.apache.log4j.HTMLLayout log4j.appender.FILE.layout.Title=HTML Layout Demo log4j.appender.FILE.layout.LocationInfo=true