下载常用方法

**方法一**
//获取文件流，将文件流转为文件通过<a></a>导出，中间可以做处理
let url = baseUrl + '接口地址' + token
axios.get(url,{responseType: 'blob',timeout:600000}).then(async res => {
	if (res.data.size < 100) {
		let fileReader = new FileReader();
		fileReader.readAsText(res.data);
		let jsonData = await new Promise((resolve, reject) => {
			fileReader.onload = function (result) {
				resolve(JSON.parse(result.target.result))
			}
		})
		if (!jsonData.success) {
			this.$message.error(jsonData.description)
			this.downloadLoading = false
			return
		}
	}
	let fileUrl = window.URL.createObjectURL(new Blob([res.data]))
	let link = document.createElement("a")
	link.href = fileUrl
	link.style.display = 'none';
	link.setAttribute('download', '文件.zip')
	document.body.appendChild(link)
	link.click()
	window.URL.revokeObjectURL(fileUrl); // 释放URL 对象
	document.body.removeChild(link);
	fileUrl = null //便于垃圾回收
	if (this.downloadLoading) {
		this.downloadLoading = false
	}
})

**方法二**
直接导出
params = {
	url: baseUrl + '接口地址?token=' + token,
		fileName: '',
	}
 download(params)
function download(params) {
    if ('download' in document.createElement("a")) {
        let link = document.createElement("a");
        link.style.display = 'none';
        link.href = params.url;
        link.target = '_blank'
        params.fileName && (link.download = params.fileName);
        document.body.appendChild(link);
        link.click();
        URL.revokeObjectURL(link.href); // 释放URL 对象
        document.body.removeChild(link);
    }
}