vue 二进制流文件导出、下载，兼容IE

this.$ajax({

                method: 'GET',

                url: '你的url',

                headers: {

                    'Authorization': tokenUtil.getToken(), // 我的token

                    'Content-Type': "application/json;charset=utf-8"

                },

                responseType: 'blob',  // 很重要

                params: params // 请求入参

            })

            .then(res =>{

                // console.log(res)

                let headersName = '';

                if(res.headers['content-disposition']) {

                    headersName = res.headers['content-disposition'].split('=')[1];

                }

                 else {

                    headersName = '文件名称';

                }

                let fileName = decodeURI(headersName);

                let blob = new Blob([res.data], {type: 'application/vnd.ms-excel'});  // 注意你的文件类型，我的是excel，需要什么类型文件，对应修改即可

                // IE兼容

                if (window.navigator.msSaveOrOpenBlob) {

                    window.navigator.msSaveOrOpenBlob(blob, fileName);

        　　　　} else {

                    var a = document.createElement('a');

                    a.download = fileName;

                    a.href = URL.createObjectURL(blob);

                    a.setAttribute("id", "export");

                    document.getElementById("platform").append(a); // 修复firefox中无法触发click， platform 为我本页div 的id， 此处可直接用document.body

                    a.click();

                    document.getElementById("export").remove();

                }

                this.loading = false;

            })

            .catch(err =>{

                this.loading = false;

            })