用api在ie8下载excel文件文件名变成类名

![![![![图片说明](https://img-ask.csdn.net/upload/201705/24/1495598772_203624.png)图片说明](https://img-ask.csdn.net/upload/201705/24/1495598764_725004.png)图片说明](https://img-ask.csdn.net/upload/201705/24/1495598755_992564.png)图片说明](https://img-ask.csdn.net/upload/201705/24/1495598741_314816.png)图片说明