log4j不打印日志文件到tomcat日志中
如有以下log4j配置：

log4j.rootLogger=INFO, stdoutlog4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.Threshold = INFOlog4j.appender.stdout.encoding=UTF-8log4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%p %d [%t] %c.%M(%L) | %m%nlog4j.logger.com.packagename = INFO, seldefappenderlog4j.appender.seldefappender=org.apache.log4j.DailyRollingFileAppenderlog4j.appender.seldefappender.File=/a8root/app/logs/client/clientfee.loglog4j.appender.seldefappender.DatePattern='.'yyyyMMddlog4j.appender.seldefappender.Threshold = INFOlog4j.appender.seldefappender.encoding=UTF-8log4j.appender.seldefappender.layout=org.apache.log4j.PatternLayoutlog4j.appender.seldefappender.layout.ConversionPattern=%p %d [%t] %c.%M(%L) | %m%nlog4j.additivity.com.packagename = true

log4j.additivity.com.packagename = true
此处配置含义是：
com.packagename包的日志不追加到根目录的stdout输出对象中；