下载流文件

1、请求接口中，指定接收文件类型 responseType: "blob"

//例如
import request from "@/utils/requestDown"; //封装的请求文件，直接返回response.data
export function exportStatistics(data) {
  return request({
    url: '/perform/backstage/statistics/v1/exportStatistics',
    method: 'post',
    data,
    responseType: "blob" //设置接收数据的类型
  })
}

//下载excel的工具-目前只接文件流,调用该方法时，将接收到的返回值，直接传给改方法
export function downloadExcel(data) {
  let blob = new Blob([data], {
    type: "application/vnd.ms-excel;"
  })
  if ("download" in document.createElement("a")) {
    let de = document.createElement('a');
    de.style.display = "none";
    let hrefLink = window.URL.createObjectURL(blob);
    de.href = hrefLink; //创建下载的链接
    de.download = `${new Date().getTime()}.xlsx`; //下载后文件名
    document.body.appendChild(de);
    de.click(); //点击下载
    window.URL.revokeObjectURL(de.href); //释放掉blob对象
    document.body.removeChild(de); //下载完成移除元素
  } else {
    console.log(blob, fileName);
  }
}

        response.setContentType("application/octet-stream");
        response.setHeader("Content-disposition", "attachment;filename=123456.xls");
        response.flushBuffer();
        OutputStream outputStream = response.getOutputStream();
        workbook.write(outputStream);
        outputStream.flush();
        outputStream.close();