通用型下载，只要给一个完整的url地址

image.png

utils的写法，就是用a标签下载

    //文件下载
    downFile(url, name) {
        let x = new XMLHttpRequest();
        x.open("GET", url, true);
        x.responseType = 'blob';
        x.onload = function (e) {
            console.log('9999', x)
            let url = window.URL.createObjectURL(x.response)
            let a = document.createElement('a');
            a.href = url
            a.download = name;
            a.click()
        }
        x.send();
    },

image.png