java导出网页中的表格为Excel

<dependency>
         <groupId>org.apache.poi</groupId>
         <artifactId>poi-ooxml</artifactId>
         <version>3.17</version>
 </dependency>

public String exportExcel(String startTime,String endTime,HttpServletResponse response) throws IOException {
               List<store_order> list = emptySpecialStoreService.selectOrderbyTime(startTime, endTime);
        String fileName = "orderInfo";  //设置导出excel文件名称
        HSSFWorkbook workbook = new HSSFWorkbook();  //创建Excel工作薄对象
        HSSFSheet sheet = workbook.createSheet();    //创建工作表对象
        sheet.setColumnWidth(12,5000);      //设置表的最后一列第12列的宽度//设置表头字体样式
        HSSFFont font = workbook.createFont();
        font.setFontName("宋体");
        font.setFontHeightInPoints((short)10);  //设置字号
        font.setBold(true);   //设置加粗
        
        //HSSFCellStyle cellStyle = workbook.createCellStyle();  //设置列字体，这里暂不设置
        
        HSSFRow row0 = sheet.createRow(0);  //创建第一行，第一行为每一列的标题
       
        String[] cellTitle={"订单号","用户账号","商品名称","优惠前价格","优惠后价格","商品类型","KT币数量","收件人姓名","收件人地址","收件人手机号","商品来源","订单状态","创建时间"};
        for(int i=0;i<cellTitle.length;i++) {
             HSSFCell cell = row0.createCell(i);   //依次设置列标题
             cell.setCellValue(cellTitle[i]);
        }
        //表格中数据总共12列，循环新建一行，然后把对象中的值依次写入到这一行中的每一列
        for(int i=0;i<list.size();i++) {
            HSSFRow row = sheet.createRow(i+1);   //创建新的一行
            store_order order = list.get(i);
            
            HSSFCell cell0 = row.createCell(0);  //依次为当前行的每一列添加数据
            cell0.setCellValue(order.getStore_order_id());
            
            HSSFCell cell1 = row.createCell(1);  
            cell1.setCellValue(order.getUsercode());
            
            HSSFCell cell2 = row.createCell(2);  
            cell2.setCellValue(order.getProduct_name());
            
            HSSFCell cell3 = row.createCell(3);  
            cell3.setCellValue(order.getPrice_before());
            
            HSSFCell cell4 = row.createCell(4);  
            cell4.setCellValue(order.getPrice_after());
            
            HSSFCell cell5 = row.createCell(5);  
            cell5.setCellValue(order.getProduct_type());
            
            HSSFCell cell6 = row.createCell(6);  
            cell6.setCellValue(order.getAmountKT());
            
            HSSFCell cell7 = row.createCell(7);  
            cell7.setCellValue(order.getPeople_name());
            
            HSSFCell cell8 = row.createCell(8);  
            cell8.setCellValue(order.getPeople_address());
            
            HSSFCell cell9 = row.createCell(9);  
            cell9.setCellValue(order.getPeople_mobile());
            
            HSSFCell cell10 = row.createCell(10);  
            cell10.setCellValue(order.getProduct_source());
            
            HSSFCell cell11 = row.createCell(11);
            cell11.setCellValue(order.getProduct_status());

            HSSFCell cell12 = row.createCell(12);  
            cell12.setCellValue(order.getCreate_time());
       }
         
        OutputStream os = response.getOutputStream();
        response.reset();  //重置输出流
        //设置输出头文件
        response.setHeader("Content-disposition", "attachment; filename=" + new String(fileName.getBytes("GB2312"), "8859_1") + ".xls");  //.xls是excel文件的后缀
        //定义输出头类型
        response.setContentType("application/msexcel");
        workbook.write(os);
        os.close();
        
        System.out.println("导出完成=============");
        return "导出成功！";
    }