log4j使用示例

### set log levels ###
log4j.rootLogger = INFO , D  
#INFO , C , D , E 

### console ###
#log4j.appender.C = org.apache.log4j.ConsoleAppender
#log4j.appender.C.Target = System.out
#log4j.appender.C.layout = org.apache.log4j.PatternLayout
#log4j.appender.C.layout.ConversionPattern = [springmvc_mybatis_demo][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n

### log file ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = app.log
log4j.appender.D.DatePattern='_'yyyy-MM-dd'.log'
log4j.appender.D.Append = true
log4j.appender.D.Threshold = INFO 
log4j.appender.D.MaxFileSize=10240KB  
log4j.appender.D.MaxBackupIndex=1000  
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = [springmvc_mybatis_demo][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n

### exception ###
#log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
#log4j.appender.E.File = ../logs/springmvc-mybatis-demo_error.log 
#log4j.appender.E.Append = true
#log4j.appender.E.Threshold = ERROR 
#log4j.appender.E.layout = org.apache.log4j.PatternLayout
#log4j.appender.E.layout.ConversionPattern = [sspringmvc_mybatis_demo][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n

import org.apache.log4j.Logger;
private static Logger logger = Logger.getLogger(xxxxx.class);