Using RegExp in Notepad++ to convert all RollingFileAppender to DailyRollingFileAppender in a log4j.properties file

1) Change RollingFileAppender to DailyRollingFileAppender

Search for

log4j.RollingFileAppender

Replace with

log4j.DailyRollingFileAppender


2) To comment out the MaxFileSize line:

Search for

log4j\.appender\.[a-zA-Z]+\.MaxFileSize

Replace with

#$&

This works because $& matches the entire expression matched.
(Commenting out instead of deleting in case you want to go back to Rolling.)

3) To comment out the MaxBackupIndex line:

Search for

log4j\.appender\.[a-zA-Z]+\.MaxBackupIndex

Replace with

#$&


4) To insert the DatePattern='.'yyyy-MM-dd line just before existing log4j.appender.SOMETHING.layout= line:

Search for

(log4j\.appender\.[a-zA-Z]+\.)layout=

Replace with

${1}DatePattern='.'yyyy-MM-dd\n$&

This works because:
The parentheses marking from "log4j" to just before "layout" marks out the part returned by ${1}
Then the "\n" adds a newline
Then the $& restores the beginning of the layout= line.

 

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