poi 实战代码---导出Excel（根据模板导出,复制代码用）

  <a class="btn btn-primary fa fa-export" href="javascript:void(0);" onclick="expExcel()"><span>导出excel</span></a>

function expExcel() {
        
        var ids=new Array();
        $("input:checkbox:checked").each(function(){
            //ids.push($(this).val());
            ids.push($(this).attr("id"));
        });
        if(ids.length==0){
            alert("请至少选中一条记录");
            return;
        }
         // alert(ids);
        /*    for(var id in ids){
           alert(id);
        } */
        if (confirm("导出选中页面数据？")) {
        
            var url = __ctx + ‘/platform/xxx/xxx/exportExcel.htm?myId=‘+ ids;
            var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
            if (userAgent.indexOf("compatible") > -1
                    && userAgent.indexOf("MSIE") > -1) {//判断是否IE浏览器
                window.location.href(url);
            } else {
                window.open(url, "导出报表");
            }
        }
    }

@RequestMapping({ "exportExcel" })
    public void exportExcel(HttpServletRequest request, HttpServletResponse response) throws Exception {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        String[] aryIds = RequestUtil.getStringAryByStr(request, "myId");
        QueryFilter queryFilter = getQuerFilter(request);
        String myIds = "";

        for (int i = 0; i < aryIds.length; i++) {
            String tmp = aryIds[i].replace("jqg_ggdjqyfgfcGrid_", "");

            if (i != aryIds.length - 1) {
                myIds += "‘" + tmp + "‘,";
            } else {
                myIds += "‘" + tmp + "‘";
            }
        }
        queryFilter.addParamsFilter("whereSql", "MY_ID_ in (" + myIds + ")");
        queryFilter.addParamsFilter("orderBySql", "TBSJ ASC");

        List<Ggdjqyfgfc> query = ggdjqyfgfcManager.query(queryFilter);

        String dirPath = FileUtil.getClassesPath() + File.separator + "template" + File.separator + "exportMode" + File.separator;
        String fileName = "ggdjfgfc.xls";
        FileInputStream inStream = new FileInputStream(new File(dirPath + fileName));

        HSSFWorkbook wb = new HSSFWorkbook(inStream);
        HSSFSheet sheet = wb.getSheetAt(0);

        HSSFCell cell = null;

        for (int i = 0; i < query.size(); i++) {
            Ggdjqyfgfc e = query.get(i);
            HSSFRow row = sheet.getRow(i + 2);
            row = ExcelUtil.getNotNullRow(sheet, i + 2);

            cell = ExcelUtil.getNotNullCell(wb, row, 0);
            cell.setCellValue(sdf.format(e.getTbsj()));

            cell = ExcelUtil.getNotNullCell(wb, row, 1);
            cell.setCellValue(e.getGdj() + "");

            cell = ExcelUtil.getNotNullCell(wb, row, 2);
            cell.setCellValue(e.getRjdl() + "");

            cell = ExcelUtil.getNotNullCell(wb, row, 3);
            cell.setCellValue(e.getDrdl() + "");

            cell = ExcelUtil.getNotNullCell(wb, row, 4);
            cell.setCellValue(e.getFcl() + "");

            cell = ExcelUtil.getNotNullCell(wb, row, 5);
            cell.setCellValue(e.getQyzs() + "");

            cell = ExcelUtil.getNotNullCell(wb, row, 6);
            cell.setCellValue(e.getFgqyhs() + "");
            cell = ExcelUtil.getNotNullCell(wb, row, 7);
            cell.setCellValue(e.getFgl() + "");

        }

        fileName = "xxxx表_" + ".xls";

        response.setContentType("application/octet-stream;charset=UTF-8");
        response.setHeader("Content-Type", "application/vnd.ms-excel");
        response.setHeader("Content-Disposition", "attachment;filename=" + new String(fileName.getBytes("GB2312"), "8859_1"));
        response.addHeader("Pargam", "no-cache");
        response.addHeader("Cache-Control", "no-cache");
        OutputStream out = response.getOutputStream();
        wb.write(out);
        out.flush();
        out.close();
    }