java - Java outputstream into a workbook

Question

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?

Answer 1

为什么要担心该输出流...如果您的服务器中有该文件，请使用 poi 来完成工作...如果只有输出流可用，请将其写入文件然后使用 poi。