Log4j Format Specification

External

• http://logging.apache.org/log4j/2.x/manual/layouts.html

Internal

• log4j

Overview

log4j calls its output format layout. Most commonly used is the pattern layout:

http://logging.apache.org/log4j/2.x/manual/layouts.html#PatternLayout

Format Modifier

A format modifier modifies how the data generated by the pattern layout element