struts关于log4j有关问题

struts关于log4j问题
我的log4j.properties文件内容如下
log4j.rootLogger=info,A1

log4j.logger.index=info,index
log4j.logger.admin=info,admin

log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd   HH:mm:ss}   [%c]-[%p]   %m%n
log4j.appender.A1.DatePattern   =   '. 'yyyy-MM-dd
log4j.appender.A1.File=C:/logger/A1.log


log4j.appender.index   =org.apache.log4j.RollingFileAppender
log4j.appender.index.File=C:/logger/index.log
log4j.appender.index.maxFileSize=60000KB
log4j.appender.index.maxBackupIndex=1
log4j.appender.index.layout=org.apache.log4j.PatternLayout
log4j.appender.index.layout.ConversionPattern=%d{yyyy-MM-dd   HH:mm:ss}method:%l%m%n


log4j.appender.admin   =org.apache.log4j.RollingFileAppender
log4j.appender.admin.File=C:/logger/admin.log
log4j.appender.admin.maxFileSize=60000KB
log4j.appender.admin.maxBackupIndex=1
log4j.appender.admin.layout=org.apache.log4j.PatternLayout
log4j.appender.admin.layout.ConversionPattern=%d{yyyy-MM-dd   HH:mm:ss}method:%l%m%n

为什么执行这个
import   org.apache.log4j.Logger;

public   class   HelloWorld   {

public   static   Logger   log=Logger.getLogger( "index ");
public   static   void   main(String[]   args)   {
System.out.println( "yjx--> test: ");
log.info( "HelloWorld! ");

}

}
控制台打印出如下信息：
yjx--> test:
log4j:WARN   No   appenders   could   be   found   for   logger   (index).
log4j:WARN   Please   initialize   the   log4j   system   properly.




------解决方案--------------------
将log4j。properties靠到classes下即可