Log4j2-HtmlPatternLayout

Extends log4j2 HTMLLayout with the possibility to format strings using the syntax used in the pattern layout.

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration packages="com.github.kilianB.log4j"
	status="WARN">
	<Appenders>
		<File name="LOGFILE" fileName="logfile.html" append="false">
			<PatternHtmlLayout
				pattern="%p %td %d{HH:mm:ss} %td %c{1} %td %m"
				header="Priority,Time,Sender,Message" omitStyle="true"
				justTable = "true"
				theadCSSClass= "thead-dark"
				tableCSSClass="table table-striped" />
		</File>
	</Appenders>
	<Loggers>
		<Root level="info">
			<AppenderRef ref="LOGFILE" />
		</Root>
	</Loggers>
</Configuration>

log4j2.properties example

packages = com.github.kilianB.log4j

appender.fileAppender.type = File
appender.fileAppender.name = LOGFILE
appender.fileAppender.append = FALSE
appender.fileAppender.layout.type = PatternHtmlLayout
appender.fileAppender.layout.header = Priority,Time,Sender,Message
appender.fileAppender.layout.pattern = %p %td %d{HH:mm:ss} %td %c{1} %td %m
appender.fileAppender.layout.omitStyle = TRUE
appender.fileAppender.layout.tableCSSClass = striped highlight responsive-table

Configuration parameters.

Tags	Description	Default
header	Comma seperated list of table headers. The table will have as many columns as headers supplied	REQUIRED
pattern	The pattern usage as defined by the pattern layout. The new introduced %td% keyword symbolizes the start of a new table cell.	REQUIRED - %m%n
omitStyle	TRUE | FALSE. Ignore the default styling of the original htmlLayout	FALSE
justTable	TRUE | FALSE. Only print the table content to the file without html head/body markup. if true omitStyle is implied to be true	FALSE
tableCSSClass	CSS class attached to the table tag. Useful if embedded into page with external styles
theadCSSClass	CSS class attached to the thead tag. Useful if embedded into page with external styles
title	title of the html page	Log4j Log Messages
contentType	html head tag. default	text/html
charset	charset of the html page	UTF-8
fontSize	fontSize used in the table. Ignored if omitStyle = TRUE	small
fontName	Font used in the table. Ignored if omitStyle = TRUE	arial,sans-serif
fontName	Font used in the table. Ignored if omitStyle = TRUE	arial,sans-serif
alwaysWriteExceptions	Outputs exceptions even if no exception is included in the pattern	TRUE
noConsoleNoAnsi	If true and System.console() is null, do not output ANSI escape codes.	FALSE