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log4j.properties配置：
log4j.rootLogger=INFO,flume,stdout
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=%m%n
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=spider.log
log4j.appender.R.MaxFileSize=500KB
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n
log4j.appender.flume =org.apache.flume.clients.log4jappender.Log4jAppender
log4j.appender.flume.Hostname = hadoop01
log4j.appender.flume.Port = 44444
log4j.appender.flume.UnsafeMode = true
log4j.appender.flume.layout=org.apache.log4j.PatternLayout
log4j.appender.flume.layout.ConversionPattern=%m%n
log4j.appender.socket=org.apache.log4j.net.SocketAppender
log4j.appender.socket.RemoteHost=hadoop192
log4j.appender.socket.port=4560
log4j.appender.socket.application=localclient