如果希望将debug、info等写入日志文件的信息同时打印到控制台，
需要在log4j中配置控制台，并且在为log4j.rootLogger赋值时，最后一个添加控制台信息，
我目前的配置结果如下：
log4j.rootLogger=debug,infofile,errorlogfile,D,stdout
log4j.appender.infofile =
org.apache.log4j.DailyRollingFileAppender
log4j.appender.infofile.Threshold =
INFO
log4j.appender.infofile.File = E/://logs//20101222//loginfo
log4j.appender.infofile.Append =
true
log4j.appender.infofile.ImmediateFlush = true
log4j.appender.infofile.DatePattern = '_'yyyyMMdd'.log '
log4j.appender.infofile.layout =
org.apache.log4j.PatternLayout
log4j.appender.infofile.layout.ConversionPattern
= /#ARCHIVEINFO/#%d{yyyy-MM-dd HH/:mm/:ss}%m%n
log4j.appender.D =
org.apache.log4j.RollingFileAppender
log4j.appender.D.File =
E/://logs//20101222//logdebug.log
log4j.appender.D.MaxFileSize=1024KB
log4j.appender.D.MaxBackupIndex
= 10000
log4j.appender.D.Append = true
log4j.appender.D.Threshold =
DEBUG
log4j.appender.D.layout =
org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern =
[%d{yyyy-MM-dd HH/:mm/:ss}]%-5p %c(line/:%L) %x-%m%n
log4j.appender.errorlogfile =
org.apache.log4j.RollingFileAppender
log4j.appender.errorlogfile.Threshold =
ERROR
log4j.appender.errorlogfile.File =
E/://logs//20101222//logerror.log
log4j.appender.errorlogfile.Append = true
log4j.appender.errorlogfile.layout =
org.apache.log4j.PatternLayout
log4j.appender.errorlogfile.layout.ConversionPattern
=%d{yyyy-MM-dd HH:mm:ss} [%c] %m -(:%L)%n
log4j.appender.stdout =
org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target =
System.out
log4j.appender.stdout.layout =
org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern
= [%d{yyyy-MM-dd HH/:mm/:ss}]%-5p %c(line/:%L) %x-%m%n
