JAVA日志

http://blog.youkuaiyun.com/zhouzhaoxiong1227/article/details/24383301    网址----对日志的直观认识

http://www.cnblogs.com/sky230/p/5759831.html

http://blog.163.com/yurong_1987@126/blog/static/47517863200852602849731/

牛逼

http://blog.youkuaiyun.com/a673341766/article/details/8156646

http://www.codeceo.com/article/log4j-usage.html

log4j.properties详解及配置说明：

http://blog.youkuaiyun.com/edward0830ly/article/details/8250412