how to make log4j to write to the console as well

user_169150 0
Viewed 179496

Is there any way to tell to log4j to write its log to the file and to the console? thanks there are my properties:

log4j.rootLogger=DEBUG,console,R
log4j.rootLogger=INFO, FILE

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p - %m%n

log4j.appender.FILE=org.apache.log4j.RollingFileAppender
log4j.appender.FILE.File=log4j.log
log4j.appender.FILE.MaxFileSize=512KB
log4j.appender.FILE.MaxBackupIndex=3
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p - %m%n
log4j logging apache java
5 Answers

Write the root logger as below for logging on both console and FILE

log4j.rootLogger=ERROR,console,FILE

And write the respective definitions like Target, Layout, and ConversionPattern (MaxFileSize for file etc).

user_12110170

Thats the exact usecase I was looking for my command line based tool. Wanted to show INFO on console but wanted to log more detailed info to log file. After various suggestion, finally go this solved by using 'log4j.appender.FILE.Threshold' Something like below.:

log4j.rootLogger=DEBUG,CONSOLE,FILE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.FILE=org.apache.log4j.RollingFileAppender
log4j.appender.FILE.File=output/log.log
log4j.appender.CONSOLE.Threshold=INFO
log4j.appender.FILE.Threshold=DEBUG
user_12877300
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