Formatting Dates in JExcel

Jexcel has an annoying Feature: It exports Dates always as UTC.

They have published some kind of workaround for reading Excelfiles, but it does not work for Writing Excel files.

My workaround:

TimeZone tz = TimeZone.getDefault();

int offset = tz.getOffset(date.getTime());

Calendar cal = new GregorianCalendar();

cal.setTime(date);

cal.add(Calendar.MILLISECOND, offset);

DateTime datetime = new DateTime(j,i, cal.getTime());

WritableCellFormat cf = new WritableCellFormat(df);

datetime.setCellFormat(cf);