Date formatting doesn't seem to work with POI 3.0.2 and Excel 2010

[David Sills]

All:

 

I'm a newbie at using POI (using 3.0.2 mostly because that's the latest
Spring works with) and it seemed really sensible until I hit this
roadblock. I can create a cell just fine (working with the HSSF classes,
as that's the form appropriate for my client), but when I try to create
a date-formatted cell, no formatting seems to work at all! I've tried
the built-in date/time formats in HSSFDataFormat, custom formats, the
works. All I get is something like "40973.28833" every time. The cell
comes up as a General cell, not a Date cell (or even, as I set it at one
point, as a numeric cell - as you can see below, I tried also not
setting it at all, and that didn't help either).

 

My code looks like this:

 

                     HSSFCellStyle cellStyle =
workbook.createCellStyle();

                     HSSFDataFormat formatter =
workbook.createDataFormat();

                     short idx = formatter.getFormat(dateFormat);

                     if (idx > -1)

                     {

                           cellStyle.setDataFormat(idx);

//                         cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);

                           cell.setCellValue((Date) o);

                     }

                     else

                     {

                           String s = dataCell.getValue(rowcount, data);

                           cell.setCellType(HSSFCell.CELL_TYPE_STRING);

                           cell.setCellValue(new HSSFRichTextString(s));

                     }

 

 

Has anyone any ideas? I have looked through the mailing list archives
and couldn't see anyone else having this problem, so it must be
something I'm doing wrong. I would greatly appreciate any help anyone
can give me. I can obviously format the date as a String, but then it
won't sort correctly in Excel, I wouldn't imagine.

 

Thanks!

 

David Sills