vue将文件/图片批量打包下载

各种格式都可以,只要url能够打开或者下载文件即可.

1.通过文件的url,使用js的XMLHttpRequest获取blob

2.将blob压缩为zip

由于异步并行加载文件,速度还是蛮快的,我141个4M多的图片,1分左右加载完成,49个4M的图片4秒

添加依赖

//npm install jszip

//npm install file-saver

在页面的script中引入依赖

import JSZip from 'jszip'

import FileSaver from 'file-saver'

代码

/**文件打包 * arrImages:文件list:[{fileUrl:文件url,renameFileName:文件名}] * filename 压缩包名 * */ filesToRar(arrImages, filename) { let _this = this; let zip = new JSZip(); let cache = {}; let promises = []; _this.title = '正在加载压缩文件'; for (let item of arrImages) { const promise= _this.getImgArrayBuffer(item.fileUrl).then(data => { // 下载文件, 并存成ArrayBuffer对象(blob) zip.file(item.renameFileName, data, { binary: true }); // 逐个添加文件 cache[item.renameFileName] = data; }); promises.push(promise); } Promise.all(promises).then(() => { zip.generateAsync({ type: "blob" }).then(content => { _this.title = '正在压缩'; // 生成二进制流 FileSaver.saveAs(content, filename); // 利用file-saver保存文件 自定义文件名 _this.title = '压缩完成'; }); }).catch(res=>{ _this.$message.error('文件压缩失败'); }); }, //获取文件blob getImgArrayBuffer(url){ let _this=this; 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(); }); },

补充知识：vue 生成二维码并且批量打包下载代码

我就废话不多说了，大家还是直接看代码吧~

<template> <div> <div v-show="codeId" ref="QrcodePage" style="z-index:-1111;position:absolute;left:-99999;width: 450px;height: 475px;background-size: cover;"> <div id="qrCode" v-if="codeId"> <QrcodeVue :logoSrc="imageUrl" :key="random" :callback="texte" :text="codeValue" :logoScale="50" :size="750"></QrcodeVue> <p style="text-align: center; font-size: 1.5625rem;">{{ codeNumber }}</p> </div> </div> </div></template><script>let loadingInstance = '';import QrcodeVue from 'vue-qr';import html2canvas from 'html2canvas';import JSZip from 'jszip';import FileSaver from 'file-saver';export default { name: 'qrcode', components: { QrcodeVue }, data() { return { random: '1', codeId: '', qrcodeUrl: '', imageUrl: '', // imageUrl: 'https://shop.mmdddd.com/workShopWeb/static/img/72.png',//logo qrContentImage: '', codeValue: '', initCodeVal: 'http://xcx.nmte.net/tips/index.html', codeNumber: '', arr: [], qrcodeArr: [], index: 0 }; }, watch: { index(newName, oldName){ if(newName != oldName && newName <= this.arr.length-1){ setTimeout(_ => { this.setarr(this.arr); }, 0); }else { this.$nextTick(_ => { loadingInstance.close(); }); } } }, created() { }, mounted() {}, methods: { texte(url,qid) { setTimeout(_ => { this.createImgs(); }, 100); }, setarr(arr) { this.arr = arr; if(this.index > this.arr.length -1) { this.index = 0; } let index=this.index||0; loadingInstance = this.$Loading.service({ lock: true, text: '二维码码批量下载中，请稍后...', spinner: 'el-icon-loading', background: 'rgba(0, 0, 0, 0.7)' }); this.codeNumber = this.arr[index].codeNumber; this.arr[index].codeId ? (this.codeId = this.arr[index].codeId) : this.$Message.warn('获取信息失败，请刷新重试'); this.codeValue = this.initCodeVal + '?codeId=' + this.arr[index].codeId + '&codeNumber=' + this.arr[index].codeNumber; this.random = Math.random(); }, createImgs() { var that = this; if(that.index <= that.arr.length -1 && that.codeId){ let shareContent = that.$refs.QrcodePage, width = shareContent.offsetWidth, height = shareContent.offsetHeight, canvas = document.createElement('canvas'), scale = 1; canvas.width = width * scale; canvas.height = height * scale; canvas.style.width = (shareContent.clientWidth * scale) / 100 + 'rem'; canvas.style.height = (shareContent.clientHeight * scale) / 100 + 'rem'; canvas.getContext('2d').scale(scale, scale); let opts = { scale: scale, canvas: canvas, logging: false, width: width, height: height, useCORS: true }; html2canvas(shareContent, opts) .then(function(canvas) { const qrContentImage = canvas.toDataURL('image/jpeg', 1.0); if(that.index <= that.arr.length -1 && that.codeId){ that.qrcodeArr.push({ url: qrContentImage, name: that.arr[that.index].codeNumber }); } if(that.codeId){ that.index ++; } if(that.qrcodeArr.length == that.arr.length){ that.packageImages(); that.codeId = null; } }) .catch(function(reason) { console.log(reason); }); } }, packageImages() { let that = this; const zip = new JSZip(); const cache = {}; setTimeout(_ => { let arr = that.qrcodeArr; arr.forEach((item,index)=>{ let fileName = item.name; zip.file(fileName + '.png',item.url.substring(22),{base64:true}) cache[fileName] = item.url }) zip.generateAsync({type:"blob"}).then(content => { FileSaver.saveAs(content, "二维码.zip") }) },0) } }};</script><style lang="less" scoped="scoped">#qrCode { width: 375px; height: 375px; position: absolute; top: 52%; left: 50%; transform: translate(-50%, -50%); img { display: block; width: 100%; height: 100%; }}</style>

调用setarr传数组

以上这篇vue将文件/图片批量打包下载zip的教程就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。