后台:
XSSFWorkbook hwb = ExcelUtil.downloadJiaoFei(listVx);
// 设置response参数,可以打开下载页面
response.reset();
//定义下载的类型,标明是excel文件
response.setContentType("application/vnd.ms-excel; charset=UTF-8");
//定义浏览器响应表头,顺带定义下载名,比如students
response.setHeader("Content-disposition", "attachment;filename="+
excelName);
fos = new FileOutputStream(file+separator+excelName);//先 new 出文件存放的位置
hwb.write(response.getOutputStream());//写入