原文地址：http://www.sencha.com/blog/mzpivotgrid-a-pivot-table-for-ext-js?mkt_tok=3RkMMJWWfF9wsRokvq3BZKXonjHpfsX77%2BsqWK%2B0lMI%2F0ER3fOvrPUfGjI4JSMZ0dvycMRAVFZl5nR9dFOOdfQ%3D%3D