@Namespace("/")
@ParentPackage("json-default")
@Scope("prototype")
@Controller
public class ReportAction extends BaseAction<WayBill> {
//自動注入wayBillService物件
    @Autowired
    private WayBillService wayBillService;

    @Action(value="report_exportXls")
    public String exportXls() throws IOException {
        //查詢出滿足當前條件的結果資料,獲得需要轉化成表格的資料,該model是頁面傳來的資料自動封裝成的物件.
        //該部分邏輯不作介紹
        List<WayBill> wayBills = wayBillService.findWayBills(model);

        //建立excel表格物件
        HSSFWorkbook hssfWorkbook = new HSSFWorkbook();
        HSSFSheet sheet = hssfWorkbook.createSheet("運單資料");

        //建立表頭行
        HSSFRow headRow = sheet.createRow(0);
        headRow.createCell(0).setCellValue("運輸單號");
        headRow.createCell(1).setCellValue("寄件人姓名");
        headRow.createCell(2).setCellValue("寄件人電話");
        headRow.createCell(3).setCellValue("寄件人地址");
        headRow.createCell(4).setCellValue("收件人姓名");
        headRow.createCell(5).setCellValue("收件人電話");
        headRow.createCell(6).setCellValue("收件人地址");


        //每一次都迴圈建立資料列並對錶格資料進行遍歷插入
        for (WayBill wayBill:wayBills
             ) {
            HSSFRow rows = sheet.createRow(sheet.getLastRowNum()+1);
            rows.createCell(0).setCellValue(wayBill.getWayBillNum());
            rows.createCell(1).setCellValue(wayBill.getSendName());
            rows.createCell(2).setCellValue(wayBill.getSendMobile());
            rows.createCell(3).setCellValue(wayBill.getSendAddress());
            rows.createCell(4).setCellValue(wayBill.getRecName());
            rows.createCell(5).setCellValue(wayBill.getRecMobile());
            rows.createCell(6).setCellValue(wayBill.getRecAddress());
        }
        //下載匯出部分邏輯
        //設定頭資訊,該ContentType是Excel固定格式
        ServletActionContext.getResponse().setContentType("application/vnd.ms-excel
 
");
        //檔名
        String filename = "運單資料.xls";
        //從請求頭獲取瀏覽器型別
        String agent = ServletActionContext.getRequest().getHeader("user-agent");
        //使用工具類對檔名進行處理,使其不會亂碼
        filename = FileUtils.encodeDownloadFilename(filename,agent);
        //設定檔名作為下載檔案的標識欄位
        ServletActionContext.getResponse().setHeader(
                "Content-Disposition","attachment;filename="+filename);
        //獲取輸出流物件
        ServletOutputStream servletOutputStream = ServletActionContext.getResponse().getOutputStream();
        //輸出Excel表格
        hssfWorkbook.write(servletOutputStream);
        //關閉
        servletOutputStream.close();
        return NONE;
    }
}

附:FileUtils

/**
 * 下載檔案時，針對不同瀏覽器，進行附件名的編碼
 * 
 * @param filename
 *            下載檔名
 * @param agent
 *            客戶端瀏覽器
 * @return 編碼後的下載附件名
 * @throws IOException
 */
public static String encodeDownloadFilename(String filename, String agent)
      throws IOException {
   if (agent.contains("Firefox")) { // 火狐瀏覽器
      filename = "=?UTF-8?B?"
            + new BASE64Encoder().encode(filename.getBytes("utf-8"))
            + "?=";
      filename = filename.replaceAll("\r\n", "");
   } else { // IE及其他瀏覽器
      filename = URLEncoder.encode(filename, "utf-8");
      filename = filename.replace("+"," ");
   }
   return filename;
}