前端JS接收后端文件流实现文件下载

需求:接收后端返回的文件流导出Excel

自己项目中遇到过，亲测有效

情况一：无需传token

href：接口地址

queryValues：传参

export function batchExport(href, queryValues) {
  const link = document.createElement('a');
link.href = `${href}?${qs.stringify(queryValues)}`;
link.download = '导出.xls';
link.click();
}

情况二：header中传token，兼容IE,360兼容模式，文件名不会乱码

decodeURIComponent(xmlHttp.getResponseHeader("content-disposition").split(";")[1].split("filename=")[1] //从header中获取文件名，需后端提供，如果是前端定义的文件名，可直接 link.download = '文件名XXX'

href：接口地址

queryValues：传参

export function batchExport(href, queryValues) {
  let xmlHttp = null;
  if (window.ActiveXObject) {
    xmlHttp = new window.ActiveXObject('Microsoft.XMLHTTP');
} else if (window.XMLHttpRequest) {
    xmlHttp = new XMLHttpRequest();
}
  if (xmlHttp != null) {
    xmlHttp.ContentType = 'application/vnd.ms-excel';
xmlHttp.open('get', `${href}?${qs.stringify(queryValues)}`, true);
xmlHttp.setRequestHeader('token', getUserInfo().token);
xmlHttp.responseType = 'blob';
xmlHttp.send();
xmlHttp.onreadystatechange = doResult;
}

  function doResult() {
    let link = document.createElement('a');
link.style.display = 'none';
    if (xmlHttp.readyState === 4) {
      if (xmlHttp.status === 200) {
        //兼容IE
        if (window.navigator && window.navigator.msSaveOrOpenBlob) {
          let url = new Blob([xmlHttp.response], { type: 'application/vnd.ms-excel' });
window.navigator.msSaveOrOpenBlob(url, decodeURIComponent(xmlHttp.getResponseHeader("content-disposition").split(";")[1].split("filename=")[1]));
}else{

      //其他浏览器

let url = createObjectURL((new Blob([xmlHttp.response],
{ type: 'application/vnd.ms-excel' })));
        //文件名
link.download = decodeURIComponent(xmlHttp.getResponseHeader("content-disposition").split(";")[1].split("filename=")[1]);
link.href = url;
link.click();
}
      } else {
        message.error('下载失败');
}
    }
  }
}

 每天进步一点点~