log4j.properties文件放到WEB-INF文件夹下:
log4j.rootLogger=warn, A1

# A1 is set to be a ConsoleAppender (writes to system console).
#log4j.appender.A1=org.apache.log4j.FileAppender
log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender

# A1 uses PatternLayout.
log4j.appender.A1.File=${webapp.root}/WEB-INF/logs.txt
log4j.appender.A1.DatePattern=yyyy-MM-dd'.txt'
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%d %p [%c] - %m%n
log4j.appender.logfile.MaxFileSize=1024KB
#log4j.logger.org.hibernate.cache=debug












