1.
downloadIssue(param).then(res=>{ let blob = res if ('download' in document.createElement('a')) { // 非IE下载 let eleLink = document.createElement('a') let url = window.URL.createObjectURL(new Blob([blob],{type:"application/vnd.ms-excel"})) eleLink.href = url eleLink.download = this.unitName + "问题数据" document.body.appendChild(eleLink) eleLink.click() window.URL.revokeObjectURL(url) }else{ navigator.msSaveBlob(blob, this.unitName + "问题数据"); } })2.请求：
export function downloadIssue(param) { return axios({ url: api.downloadIssue, method: 'POST', data: param, responseType: 'blob' }) }3.特别注意：
window.URL.createObjectURL(new Blob([blob],{type:"application/vnd.ms-excel"}))这个地方的type，是从后台代码我拿到了里直接写死的，也可以前端自己获取：
借鉴于：https://www.cnblogs.com/coconutGirl/p/12605562.html
// data就是接口返回的文件流 let data = res if (data) { let attrs = res.headers['content-disposition'].split(';') // 获取文件名 let fileName = '' // 不用管fileName在第几个位置，只要=前面是fileName,就取=后面的值 for (let i = 0, l = attrs.length; i < l; i++) { let temp = attrs[i].split('=') if (temp.length > 1 && temp[0] === 'fileName') { fileName = temp[1] break } } fileName = decodeURIComponent(fileName) // 获取数据类型 let type = res.headers['content-type'].split(';')[0] let blob = new Blob([res.data], { type: type }) const a = document.createElement('a') // 创建URL const blobUrl = window.URL.createObjectURL(blob) a.download = fileName a.href = blobUrl document.body.appendChild(a) // 下载文件 a.click()中间还参考了这个问题
http://www.voidcn.com/article/p-qdigdjoc-btb.html
