poi
http://www.open-open.com/lib/view/open1433238476150.html
http://blog.csdn.net/z1074907546/article/details/50556587
jxl
http://blog.csdn.net/kevinwu629/article/details/5873758
http://www.cnblogs.com/mingforyou/archive/2013/08/26/3282922.html
http://blog.csdn.net/yhzh_311200/article/details/51249844
http://www.cnblogs.com/xcxcxcxc/p/6678373.html
http://blog.csdn.net/yhzh_311200/article/details/51249844
eclipse倒入jar包
http://jingyan.baidu.com/article/ca41422fc76c4a1eae99ed9f.html