poi 导出Excel java代码

js:

 function initBatchExport(url,sub_key,current_sub_num){
     var btn_id="#btn_char"+current_sub_num;
     if(Number(current_sub_num)==){
         btn_id="#btn_char";
     }
 //    查询条件
     //var paramObj=new Object();
     //var result_Data ={};
     month_value=$("#month_value").val();
     dim_key = sub_key;
     type = "量";
     var exportUrl=basePath+'/amount/initBatchExport.do?month_value='+month_value+'&dim_key='+dim_key+'&type='+type+'&current_sub_num='+current_sub_num;
     for (var i = ; i <=Number(current_sub_num); i++) {
         var parent_key = "parent_dim_"+(i);
         exportUrl+='&'+parent_key+'='+$("#"+parent_key).val();
     }
     $(btn_id).on("click",function(){

     //    var excelurl ="<%=basePath%>/hfx/unwantExport.action?impId="+impId;

         location.href=exportUrl;
     });
 }

controller:

 @RequestMapping(value = "/initBatchExport", method = {RequestMethod.GET,RequestMethod.POST})
     @ResponseBody
     public void initBatchExport(Locale locale, Model model,HttpServletRequest request,HttpServletResponse response){
         ResultMap data =ResultMap.defaultResultMap(); //new HashMap<String,Object>();
         //Map<String,String>  param = RequestUtils.getParamsMap(request);
         Map<String,String>  param =new HashMap<String,String>();
         Map map = request.getParameterMap();
         String current_sub_num = request.getParameter("current_sub_num");
         String month_value = request.getParameter("month_value");
         String dim_key = request.getParameter("dim_key");
         String type = request.getParameter("type");
         for (int i = ; i <=Integer.parseInt(current_sub_num); i++) {
             String parent_key = "parent_dim_"+(i);
             param.put(parent_key, request.getParameter(parent_key));
         }
         param.put("current_sub_num", current_sub_num);
         param.put("month_value", month_value);
         param.put("dim_key", dim_key);
         param.put("type", type);
         //需导出的数据
         List<ZdResult8BrandD> list = amonutService.initJqGrid(param);
         //初始化导出Excel
         // 第一步，创建一个webbook，对应一个Excel文件
           HSSFWorkbook wb = new HSSFWorkbook();
           // 第二步，在webbook中添加一个sheet,对应Excel文件中的sheet
           HSSFSheet sheet = wb.createSheet("Sheet1");
           // 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
           HSSFRow row = sheet.createRow();
           // 第四步，创建单元格，并设置值表头 设置表头居中
           HSSFCellStyle style = wb.createCellStyle();
           style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式 

           HSSFCell cell = row.createCell();
           //'账期', '地市', '品牌','机型', '价格段', '客户','分类客户', 'subtype','value'
           cell.setCellValue("账期");
           cell.setCellStyle(style);
           cell = row.createCell();
           cell.setCellValue("地市");
           cell.setCellStyle(style);
           cell = row.createCell();
           cell.setCellValue("品牌");
           cell.setCellStyle(style);
           cell = row.createCell();
           cell.setCellValue("机型");
           cell.setCellStyle(style);
           cell = row.createCell();
           cell.setCellValue("价格段");
           cell.setCellStyle(style);
           cell = row.createCell();
           cell.setCellValue("客户");
           cell.setCellStyle(style);
           cell = row.createCell();
           cell.setCellValue("分类客户");
           cell.setCellStyle(style);
           cell = row.createCell();
           cell.setCellValue("子类");
           cell.setCellStyle(style);
           cell = row.createCell();
           cell.setCellValue("值");
           cell.setCellStyle(style);

           // 第五步，写入实体数据
           for (int i = ; i < list.size(); i++){
                row = sheet.createRow(i + );
                ZdResult8BrandD zdResult = list.get(i);
                // 第四步，创建单元格，并设置值
                row.createCell().setCellValue(zdResult.getStatDay());
                row.createCell().setCellValue(zdResult.getAreaName());
                row.createCell().setCellValue(zdResult.getBrandName());
                row.createCell().setCellValue(zdResult.getSpec());
                row.createCell().setCellValue(zdResult.getPriceRange());
                row.createCell().setCellValue(zdResult.getCustName());
                row.createCell().setCellValue(zdResult.getCustStage());
                row.createCell().setCellValue(zdResult.getSubType());
                row.createCell().setCellValue(zdResult.getValue());
 //               cell = row.createCell(3);
 //               cell.setCellValue(new SimpleDateFormat("yyyy-MM-dd").format(stu.getTime()));
               }

         //第六步,输出Excel文件
           try {
           OutputStream output=response.getOutputStream();
           response.reset();
           SimpleDateFormat df = new SimpleDateFormat("yyyy_MM_dd HHmmss");//设置日期格式
           String fileName = dim_key+df.format(new Date());// new Date()为获取当前系统时间
           response.setHeader("Content-disposition", "attachment; filename="+fileName+".xls");
           response.setContentType("application/msexcel");  

             wb.write(output);
             output.flush();
         } catch (IOException e) {
             e.printStackTrace();
         }

         //return resultMap;
     }