问题
My system uses Apache-POI to manage some xls files. Now I've got almost 300 xls files, but it appears that they are in an old format so i got this exception:
The supplied spreadsheet seems to be Excel 5.0/7.0 (BIFF5) format. POI only supports BIFF8 format (from Excel versions 97/2000/XP/2003)
Is there a way to handle that or to automatically convert all those files to a biff8 format?
回答1:
Go with converting it to OOXLS format, POI supports both BIFF8 and newer OOXLS. Download official Microsoft converter pack:
http://www.microsoft.com/en-us/download/details.aspx?id=3
Convert files by running excelcnv.exe -oice <input file> <output file>. You can try run it directly from your code as external program, or create some batch file. There is a good explanation from mrdivo at social msdn here.
EDIT
The download mentioned above from microsoft.com is no longer available as of 6/21/2018. However, excelcnv.exe is a standard part of some Microsoft Office installations. It has been confirmed to be deployed with Office 2014 and Office 2016, and possibly other versions. It can be found at:
C:\Program Files (x86)\Microsoft Office\root\Office16` (or `Office14`).
回答2:
It seems apache-POI can't handle BIFF5 format.
You should try to use Java Excel API instead : http://jexcelapi.sourceforge.net/
来源：https://stackoverflow.com/questions/12428931/excel-biff5-to-biff8-conversion