excel解决办法

public void downloadExcel(List<RepairCatalogSearchResultsVO> rowDataList, String fileName) throws CROSException{
		ServletOutputStream servletOutputStream = null;
		FileOutputStream output = null;
		FileInputStream input = null;
		File exportFile = null;

		try {
			HSSFWorkbook workBook = new HSSFWorkbook();
			HSSFSheet sheet = workBook.createSheet("results");
			sheet.setDefaultColumnWidth((short)20);
			HSSFFont font1 = workBook.createFont();
			font1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

			/*HSSFCellStyle titleBold = workBook.createCellStyle();
			titleBold.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			titleBold.setWrapText(true);
			titleBold.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);
			titleBold.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
			HSSFFont font = workBook.createFont();
			font.setFontHeightInPoints((short) 12);
			font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
			titleBold.setFont(font);*/


			HSSFRow row = sheet.createRow((short) 0);
			row.createCell((short)0).setCellValue("ATA");
			//row.getCell((short)0).setCellStyle(titleBold);

			row.createCell((short)1).setCellValue("componentDesc");
			//row.getCell((short)1).setCellStyle(titleBold);
			

			Iterator<RepairCatalogSearchResultsVO> ite = rowDataList.iterator();
			int index = 1;
			while (ite.hasNext()) {
				RepairCatalogSearchResultsVO vo = ite.next();
				row = sheet.createRow(index);
				row.createCell((short)0);
				row.getCell((short)0).setCellValue(vo.getAtaNum());

				row.createCell((short)1);
				row.getCell((short)1).setCellValue(vo.getComponentDesc());

				index++;
			}

			String filePath = ((HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest()).getRealPath("/")
					+ "WEB-INF\\" + System.currentTimeMillis() + "_" + fileName;
			output = new FileOutputStream(filePath);
			workBook.write(output);
			output.flush();
			output.close();
			
			//下面写不写
			exportFile = new File(filePath);
			HttpServletResponse httpServletResponse = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse();
			servletOutputStream = httpServletResponse.getOutputStream();
			httpServletResponse.setHeader("Content-disposition",
					"attachment; filename=" + fileName);
			httpServletResponse.setContentLength((int) exportFile.length());
			httpServletResponse.setContentType("application/x-download");
			httpServletResponse.setContentType("application/vnd.ms-excel");
			byte[] buffer = new byte[1024];
			int flag = 0;
			input = new FileInputStream(exportFile);
			while ((flag = input.read(buffer)) > 0) {
				servletOutputStream.write(buffer, 0, flag);
			}
			servletOutputStream.flush();
		} catch (FileNotFoundException notFoundException) {
		} catch (IOException ioException) {
		} catch (Exception exception) {
		} finally {
			try {
				if (output != null) {
					output.close();
				}

				if (input != null) {
					input.close();
				}

				if (servletOutputStream != null) {