版本：0.7.6
- https://cdn.bootcdn.net/ajax/libs/xls/0.7.6/cpexcel.js
- https://cdn.bootcdn.net/ajax/libs/xls/0.7.6/xls.core.min.js
- https://cdn.bootcdn.net/ajax/libs/xls/0.7.6/xls.full.min.js
- https://cdn.bootcdn.net/ajax/libs/xls/0.7.6/xls.js
- https://cdn.bootcdn.net/ajax/libs/xls/0.7.6/xls.min.js