cellStyle_timestamp.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy h:mm"));
HSSFCellStyle cellStyle_decimal = workbook.createCellStyle();
cellStyle_decimal.setAlignment(HSSFCellStyle.ALIGN_RIGHT);
HSSFFont font_title = workbook.createFont();
font_title.setColor((short) 0xc);
font_title.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
font_title.setItalic(true);
font_title.setUnderline(HSSFFont.U_DOUBLE);
cellStyle_title.setFont(font_title);