open Existing XSSFWorkbook Read Only
IO exceptions are squelched in this method. If there is a problem, then null is returned. Opens an Apache POI XSSFWorkbook instance. The user is responsible for closing the workbook when done. Do not try to write to the returned workbook.
Return
an Apache POI XSSFWorkbook or null if there was a problem opening the workbook.
Parameters
path To Workbook
the path to a valid Excel xlsx workbook