npm install jszip
npm install file-saver

import JSZip from "jszip";
import FileSaver from "file-saver";
import {Message} from "view-design";

/**
 * 下载文件 传数组
 * fileList
 * [
 *   {
 *     type:'file',
 *     name:'17034953113790548.png',
 *     url:'https://zwdev.oss-cn-beijing.aliyuncs.com/company_1/default/17034953113790548.png',
 *   },
 *   {
 *     type:'folder',
 *     name:'图片',
 *     children:[
 *       {
 *         type:'file',
 *         name:'17034953113790548.png',
 *         url:'https://zwdev.oss-cn-beijing.aliyuncs.com/company_1/default/17034953113790548.png',
 *       },
 *     ]
 *   }
 * ]
 * @param {*} fileList
 * @param fileName //zip文件名称 默认时间戳
 */

export function downLoadZip(fileList, fileName = new Date().getTime()) {
  const zip = new JSZip()
  const promises = []
  fileList.forEach((item, index) => {
    if (item.type === 'folder') {
      let promiseFolder = zip.folder(item.name)//文件夹名
      if (item.children && item.children.length > 0) {
        item.children.forEach((file, ii) => {
          let promise = getFile(file.url).then((data) => {
            promiseFolder.file(file.name, data, {binary: true})//文件名、文件流、是否为二进制
          })
          promises.push(promise)
        })
      }
    } else if (item.type === 'file') {
      let promise = getFile(item.url).then((data) => {
        zip.file(item.name, data, {binary: true})//文件名、文件流、是否为二进制
      })
      promises.push(promise)
    }
  })
  Promise.all(promises).then(() => {
    zip.generateAsync({type: 'blob'}).then((content) => {
      //利用file-saver保存文件  自定义文件名
      FileSaver.saveAs(content, fileName)
    })
  }).catch((err) => {
    Message.error({content: '文件压缩失败' + err})
  })

}

function getFile(url) {
  return new Promise((resolve, reject) => {
    //通过请求获取文件blob格式
    let xmlhttp = new XMLHttpRequest();
    xmlhttp.open("GET", url, true);
    xmlhttp.responseType = "blob";
    xmlhttp.onload = function () {
      if (this.status == 200) {
        resolve(this.response);
      } else {
        reject(this.status);
      }
    }
    xmlhttp.send();
  });
}