结合模板导出PDF文件

@Action("report_exportJasperPdf")
   public String exportJasperPdf() throws Exception{
       //查询出满足当前条件结果数据
       List<WayBill> wayBills = wayBillService.findWayBills(model);
       //下载导出
       //设置头信息
       ServletActionContext.getResponse().setContentType("application/pdf");
       String filename = "运单数据.pdf";

       String agent = ServletActionContext.getRequest().getHeader("user-agent");
       filename = FileUtils.encodeDownloadFilename(filename, agent);
       ServletActionContext.getResponse().setHeader("Content-Disposition",
               "attachment;filename="+filename);
       //根据JasperReport模板生成PDF
       //读取模板文件
       String jrxml = ServletActionContext.getServletContext().getRealPath(
               "/WEB-INF/jasper/waybill.jrxml");

       JasperReport report = JasperCompileManager.compileReport(jrxml);
       //设置模板数据
       //parameter变量
       Map<String,Object> parameters = new HashMap<String,Object>();
       parameters.put("company", "传智播客");
       //Field变量
       JasperPrint jasperPrint = JasperFillManager.fillReport(
                           report, parameters,new JRBeanCollectionDataSource(wayBills));
       //生成PDF客户端
       JRPdfExporter exporter = new JRPdfExporter();
       exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
       exporter.setParameter(JRExporterParameter.OUTPUT_STREAM,
               ServletActionContext.getResponse().getOutputStream());
       exporter.exportReport();//导出



       return NONE;
   }