参考:https://www.cnblogs.com/luxiaoxun/p/3374992.html(已解决)
1.NPOI下载地址:http://npoi.codeplex.com/releases/view/38113
2.NPOI学习系列教程推荐:http://www.cnblogs.com/tonyqus/archive/2009/04/12/1434209.html
参考:
http://www.cnblogs.com/Erik_Xu/archive/2012/06/08/2541957.html
http://www.cnblogs.com/linzheng/archive/2010/12/20/1912137.html
http://www.cnblogs.com/knowledgesea/archive/2012/11/16/2772547.html