实时Excel更新

Question

I have a third party application that updates cell values by opening the excel file, setting values in cells, and writing (saving) the excel file. Suppose I have the excel spreadsheet open at all times, how I do have the spreadsheet reflect these changes in real-time?

Every time there is an update, I have to re-open the excel file to see the new changes.

PS. I am using the Apache POI.

Thank you.

Answer 1

You cannot do this using Apache POI. If you have an Excel spreadsheet open in Excel, then you will get a FileNotFoundException if you attempt to write your changes to that file. At least on Windows, you will get something like this:

java.io.FileNotFoundException: MySpreadsheet.xlsx (The process cannot access the
file because it is being used by another process)

Additionally, even if this worked, there is nothing in the Apache POI API that interacts with the Excel application itself, so you cannot tell Excel to re-open the spreadsheet.