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I upload my excel files using Vaadin framework’s file uplaod tool, which returns me an outputstream. I want to read cells of that excel file probably using apache poi.
But I couldn’t figure out how can I turn that outputstream into a workbook or anything useful that I can use with POI?
Why to worry about that outputstream…if you have that file in you server use poi to do the work…if only outputstream is availble write it into a file and then use poi.