http://www.cnblogs.com/xupeizhi/archive/2013/02/18/2915659.html
http://blog.csdn.net/xluren/article/details/17489667
http://my.oschina.net/HankCN/blog/116120
shell getopts 用法
原文：http://www.cnblogs.com/nmzd/p/5374331.html
