JFinal,MySQL数据Excel文件导出

页面

使用a标签浏览器显示下载，不能直接写后台接口需要添加

javascript:window.location.href=

<a href="javascript:window.location.href='/nsUser/daochu'">一键导出</a>

Controller

/**
* 导出方法
*/
public void daochu()  {
    List<Record> list = nsUserService.getSelectList();//调用后台
    // 创建
    HSSFWorkbook wk = new HSSFWorkbook();
    // 创建一张工作表
    HSSFSheet sheet = wk.createSheet();
    //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
    sheet.setColumnWidth(0, 5000);
    //
    HSSFRow row = sheet.createRow(0);
    // 创建第一行的第一个单元格
    // 向单元格写值
    HSSFCell cell = row.createCell((short) 0);
    cell.setCellValue("ID");
    cell = row.createCell((short)1);
    cell.setCellValue("姓名");
    cell = row.createCell((short)2);
    cell.setCellValue("性别");
    cell = row.createCell((short)3);
    cell.setCellValue("联系电话");
    cell = row.createCell((short)4);
    cell.setCellValue("身份证");
    cell = row.createCell((short)5);
    cell.setCellValue("录入时间");
    cell = row.createCell((short)6);
    cell.setCellValue("地址");
    cell = row.createCell((short)7);
    cell.setCellValue("录入人");
    cell = row.createCell((short)8);
    cell.setCellValue("所属区域");
    cell = row.createCell((short)9);
    cell.setCellValue("所属支行");

    // 创建第一行
    for (int i=0;i<list.size();i++)
    {
        row = sheet.createRow(i+1);
        row.createCell(0).setCellValue(list.get(i).getStr("uid"));
        row.createCell(1).setCellValue(list.get(i).getStr("uname"));
        row.createCell(2).setCellValue(list.get(i).getStr("usex"));
        row.createCell(3).setCellValue(list.get(i).getStr("uphone"));
        row.createCell(4).setCellValue(list.get(i).getStr("usfid"));
        row.createCell(5).setCellValue(list.get(i).getStr("uaddtime"));
        row.createCell(6).setCellValue(list.get(i).getStr("uaddress"));
        row.createCell(7).setCellValue(list.get(i).getStr("ujid"));
        row.createCell(8).setCellValue(list.get(i).getStr("uqid"));
        row.createCell(9).setCellValue(list.get(i).getStr("uzid"));
    }
    try {
        /**
          * 弹出下载选择路径框
          */
        HttpServletResponse response = getResponse(); //创建response回应
        response.setContentType("application/octet-stream");
        response.setHeader("Content-disposition", "attachment;filename = UserInFo.xls");//默认Excel名称
        response.flushBuffer();
        wk.write(response.getOutputStream());
        wk.write(new FileOutputStream(new File("D://daochu/a.xls")));
        wk.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

}

sercive

 /**
     * 查询导出
     * @return
     * @throws IOException
     */
    public List<Record> getSelectList(){

        String sql = "select * from ns_user";

        return Db.find(sql);
    }