java web将数据导出为pdf格式文件代码片段

function getVerPdf() { window.open('/pms/jsp/version/getPrdVerListPdf?page='   + $("#getPage").html() + '&key=' + $("#select").val());}

/**  *   * Purpose :将产品版本列表导出为pdf格式  *   * @param req  *   请求  * @param resp  *   应答  * @param page  *   当前页数  */ @RequestMapping(value = "getPrdVerListPdf") public void getPrdTypeList(HttpServletRequest req, HttpServletResponse resp, Integer page, String key) {  resp.setContentType("application/pdf");  // 弹框选择保存路径和文件名  // resp.setHeader("content-disposition",  // "attachment;filename=PrdVerList.pdf");  // 得到当前页的数据  List<Version> verList = prdVersionSer.getAllPrdVersion(key);  if (verList.size() == 0) {   // 如果没有数据，则返回主界面并显示提示消息   req.setAttribute("getFileMsg", "没有符合条件的信息！");   req.setAttribute("select", key);   try {    req.getRequestDispatcher("/jsp/version/ver_list.jsp").forward(req, resp);   } catch (Exception e) {    e.printStackTrace();   }  } else {   // 如果有数据，则显示pdf文件   JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(verList);   String reportPath = null;   Map<String, Object> map = new HashMap<String, Object>();   if (key != "") {    map.put("prdName", verList.get(0).getPrdName());   } else {    map.put("prdName", "");   }   reportPath = req.getServletContext().getRealPath("/reports/prdVerListByPrdName.jasper");   InputStream is = null;   try {    is = new FileInputStream(reportPath);    JasperRunManager.runReportToPdfStream(is, resp.getOutputStream(), map, ds);   } catch (Exception e) {    e.printStackTrace();   } finally {    if (is != null) {     try {      is.close();     } catch (IOException e) {      e.printStackTrace();     }    }   }  } }