使用Apache POI替换从属单元格后评估公式

Question

I am able to both read and write cell values using Apache POI. When reading, I evaluate first so that I get the correct values. My use case requires that I read a sheet, replace a few values in the sheet, then read another portion of the sheet that contains cells that depend on the cells I just replaced.

Example.

A1 contains a formula: =B1+C1 . B1 contains 2 and C1 contains 3 . When I evaluate A1 I correctly get 5 . Now, if I replace, with POI api, C1 with 10 , I would expect that when I read A1 again I would see 12 . I don't... A1 now evaluates to null .

Help!

Answer 1

It seems like your question is answered in Apache POI documentation (under 'Recalculation of Formulas')

Basically it suggests something like:

Workbook wb = ...
wb.getCreationHelper().createFormulaEvaluator().evaluateAll();