Log4j vs. JSR47
 

 
Log4j
JSR47
Required JDK
1.1 or above
1.4 or above
Authorship
actual users
closed committee
License
Apache Public License
Sun Community Source License
Logger
configuration order
order independent
order independent (as of spec. version 0.75)
Support for API extensions
pervasive
none
Appender inheritance
cumulative
cumulative (as of spec. version 0.75)
Support for object rendering
yes
no
Configuration file formats
XML and key=value formats
key=value format only with very limited syntax
Support for ErrorHandlers
Yes
yes (as of version 0.75)
Filter logic
à la Linux ipchains
boolean
Part of JDK
no
yes

 
 

Log4j
Log4j Features
Log4j Loggers
Log4j Appenders
Log4j Layouts
Log4j Levels
Log4j Installation
Log4j vs. JSR47
Pros & Cons of Log4j

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