Stop displaying logger output to console from dependencies

问题

I am new to log4j hence asking SOs help.

In my Java project I have couple of Maven dependencies which clutter the console output with redundant log info. I want to disable such logging.

I understand setting additivity property to false might help. But could not use it properly.

I am looking for a log4j.xml config which will only print log output (warn, error ..) from my project and not from any dependencies.

回答1:

Redirect all the third party lib logs in a target appender, use another appender for your app

log4j.rootLogger=debug,thirdPartyLibAppender 
log4j.logger.com.yourapp=debug, yourAppAppender
log4j.additivity.com.yourapp=false

# define where do you want third party lib logs to land : in a file
log4j.appender.thirdPartyLibAppender=org.apache.log4j.FileAppender
log4j.appender.thirdPartyLibAppender.append=true
log4j.appender.thirdPartyLibAppender.file=/tmp/app.log
log4j.appender.thirdPartyLibAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.thirdPartyLibAppender.layout.ConversionPattern=[%p] %c:%m%n

# define where do you want your app logs to land : stdout
log4j.appender.yourAppAppender=org.apache.log4j.ConsoleAppender
log4j.appender.yourAppAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.yourAppAppender.layout.ConversionPattern=[%p] %c:%m%n

Setting additivity to false will prevent that your app logs end in the thirdPartyLibAppender

In those 2 lines, don't forget to replace com.yourapp by the top level package name

log4j.logger.com.yourapp=debug, yourAppAppender
log4j.additivity.com.yourapp=false

回答2:

It looks like the log4j2.xml was overriding all other config. As of now I have switched that dependency off. Maybe log4j2 > log4j hence the issue. Also xml > properties as I have seen somewhere.

来源：https://stackoverflow.com/questions/26280337/stop-displaying-logger-output-to-console-from-dependencies