log4j.rootLogger=DEBUG, R #Output to the file, and a new file is generated when the file size reaches the specified size log4j.appender.R=org.apache.log4j.RollingFileAppender #Output to the console #log4j.appender.stdout=org.apache.log4j.ConsoleAppender #log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.R.File=./log/logger1.log log4j.appender.R.MaxBackupIndex=20 log4j.appender.R.layout=org.apache.log4j.PatternLayout log4j.appender.R.layout.ConversionPattern=[%d][%p][%c] %m%n