when trying to set cell style format to m/d/yy h:mm then cell value in excel is fine. but setting format to m/d/yy h:mm:ss then seconds does not appear. HSSFCellStyle dateCellStyle; dateCellStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy h:mm:ss"));
This looks more like a question than a bug. Get on the mail list.