以文件流的形式下载文件
function exportFile(response) {
const a = document.createElement('a');
const name = decodeURIComponent(response.headers['content-disposition'].split('fileName=')[1]);
a.download = name;
a.href = URL.createObjectURL(response.data);
a.style.display = 'none';
document.body.appendChild(a);
a.click();
a.parentNode.removeChild(a);
URL.revokeObjectURL(response.data);
}