Tomcat Log4j配置 不同情况解析

http://www.cnblogs.com/alipayhutu/archive/2012/06/21/2558249.html  配置步骤

http://blog.sina.com.cn/s/blog_5ed94d710101go3u.html  配置项解析

http://www.2cto.com/kf/201211/170368.html        http://blog.youkuaiyun.com/azheng270/article/details/2173430/         配置项详细解析

http://blog.youkuaiyun.com/buster2014/article/details/50844568  Tomcat下使用Log4j 接管 catalina.out 按天生成日志文件DailyRollingFileAppender 

http://blog.youkuaiyun.com/zhoulenihao/article/details/24995397   DailyRollingFileAppender的使用

http://blog.youkuaiyun.com/pl1612127/article/details/50504592   Log4j中DailyRollingFileAppender日志文件清理策略

http://blog.youkuaiyun.com/jsky_studio/article/details/41686597  Tomcat结合log4jRollingFileAppender定期清除日志

http://sw1982.iteye.com/blog/526585     https://www.iteblog.com/archives/1634.html     DailyRollingFileAppender 加上maxBackupIndex定期删除日志

http://blog.youkuaiyun.com/zhangjianying/article/details/7442946      log4j 按设定迭代日期删除过期日志文件，同一天内按设定大小分文件