直接上源码，就是样式不太好看，但是该有的功能都有啦

 <template><divclass="pre_upload"@drop="okdrop($event)"@dragover="allowDrop($event)"><div class="pre_leve_one"></div><div class="pre_leve_two"><h4>请把文件拖放到这里来</h4><divdi="files_data"class="pre_files_data"v-show="show_tab"><table class="pre_dataintable"><thead><tr><th>序号</th><th>名称</th><th>类型</th><th>Y/N</th><th>大小</th><th>进度</th><th>操作</th></tr></thead><tbody><trv-for="(item,index) in pre_flies":key="index"><td>{{item.id}}</td><tdclass="pre_tab_name"v-on:mousemove="lookImage(item)"v-on:mouseout="closeImage(item)">{{item.name}}</td><td>{{item.type}}</td><td>{{item.flag}}</td><td>{{item.size}}&nbsp;KB</td><td>{{item.up}}</td><td><buttonclass="pre_btn_canle"@click="del_files(item.id)">取消上传</button></td></tr></tbody></table><div><buttonclass="pre_btn_del_all"@click="canle_all">全部取消</button>&nbsp;&nbsp;<buttonclass="pre_btn_up"@click="submit_files">上传</button></div></div><!-- 使用画布验证上传图片转换是否正确  --><!-- <p>画布：</p><canvasid="myCanvas"width="500"height="300"style="border:1px solid #d3d3d3;background:#ffffff;">Your browser does not support the HTML5 canvas tag.</canvas>--><!-- 画布验证过程有异步 还是img直接 --><divclass="pre_show_img"v-show="show_img"><img :src="imgsrc"></div></div></div>
</template> <script>
/*
名称：拖放上传组件
日期：2019-03-14
作者：hj
目标：
1、将拖放的文件名称展示出来:拖放过来的有可能是一堆文件和文件夹混合 当放置被拖数据时，会发生 drop 事件。
2、显示上传文件的进度
3、最好可以支持预览(只可以图片预览)*/import { base_encode } from "@/utils/base64.js";
import { GetShort } from "@/utils/localstore.js";export default {name: "pre_uploadfile2",data() {return {pre_flies: [],exist_data: [],show_tab: false,show_img:false,imgsrc: ""};},  methods: {okdrop: async function(ev) {// 调用 preventDefault() 来避免浏览器对数据的默认处理（drop 事件的默认行为是以链接形式打开）ev.preventDefault();// 通过 dataTransfer.getData("Text") 方法获得被拖的数据。该方法将返回在 setData() 方法中设置为相同类型的任何数据。// var data=ev.dataTransfer.getData("Text");var back_data = [],ok_data = [];back_data = ev.dataTransfer.files; //获取文件           for (var i = 0; i < back_data.length; i++) {var td = {};td.id = i + 1;td.name = back_data[i].name;td.type = back_data[i].type;// td.size=Math.round(Number(back_data[i].size)/1024);td.size = (Number(back_data[i].size) / 1024).toFixed(0);if (String(td.type).toLowerCase().indexOf(".exe") > 0) {td.flag = "NO";} else {td.flag = "YES";}td.up = 0 + "%";td.filedata = await this.convertFileToString(back_data[i]);        ok_data[i] = td;}var j = 0;j = this.exist_data.length; if (j > 0) {for (var i = 0; i < ok_data.length; i++) {this.exist_data[j] = ok_data[i];j += 1;}// 如果是多次拖放，需要进行二次整理var temp_d=[];for(var i=0;i<this.exist_data.length;i++){var temp_o={};temp_o.id = i + 1;temp_o.name = this.exist_data[i].name;temp_o.type = this.exist_data[i].type;temp_o.size = this.exist_data[i].size;temp_o.flag = this.exist_data[i].flag;temp_o.up = this.exist_data[i].up;temp_o.filedata= this.exist_data[i].filedata;temp_d[i]=temp_o;}this.pre_flies=temp_d;} else {this.exist_data = ok_data;this.pre_flies = this.exist_data;}this.show_tab = true;// var tf=document.getElementById("files_data");// tf.target.appendChild(files);},allowDrop: function(ev) {ev.preventDefault();},convertFileToString: function(tempfile) {return new Promise(resolve => {var tf = new FileReader();tf.readAsDataURL(tempfile);tf.onload = function() {resolve(this.result);};});},submit_files: async function() {this.exist_data = [];for (var i = 0; i < this.pre_flies.length; i++) {/*这块应该还可以用vuex 封装*/ var postdata = "";postdata ='{"action":"data_upfile_db","user_no":"' +GetShort("userno") +'","upfile_name":"' +this.pre_flies[i].name +'","upfile_type":"' +this.pre_flies[i].type +'","upfile_size":"' +this.pre_flies[i].size +'","upfile_data":"' +this.pre_flies[i].filedata +'"}';postdata ='{"method":"File_load","data":"' + base_encode(postdata) + '"}';var tp = this.pre_flies[i];await this.updatabyquere(postdata, tp);}},updatabyquere: function(postdata, tp) {this.$postfile("/Data_Back",postdata,res => {var loaded = 0,total = 0;loaded = res.loaded;total = res.total;this.$nextTick(() => {// console.log(tp);tp.up = ((loaded / total) * 100).toFixed(2) + " %";});}).then(res => {try {res = JSON.parse(res);res = res.data;if (res.status == 1) {tp.up = "上传成功";} else {tp.up = "上传失败";}} catch (ex) {tp.up = "上传失败";}});},del_files: function(id) {var data = []; var j=0;for (var i = 0; i < this.pre_flies.length; i++) {        if (this.pre_flies[i].id != id) {data[j] = this.pre_flies[i];j+=1;}}this.pre_flies = data;if (this.pre_flies.length == 0) {this.show_tab = false;}},canle_all: function() {this.pre_flies = [];      this.exist_data = [];this.show_tab = false;},lookImage:function(parm){console.log('进来'+parm.name);if (/\.(gif|jpg|jpeg|png|GIF|JPG|PNG|ico)$/.test(parm.name)) {this.imgsrc=parm.filedata;this.show_img=true;}},closeImage:function(parm){console.log('出去');this.show_img=false;}}
};
</script><style scoped>
.pre_upload {width: 100%;min-height: 200px;height: 100%;background-color: azure;text-align: center;/* padding: 10px 20px 10px 20px; */
}
.pre_leve_one {height: 5px;
}.pre_leve_two {/* padding: 5px; */margin: 15px;margin-top: 15px;border: 1px solid #191970;min-height: 200px;height: auto;
}.pre_files_data {width: 100%;min-height: 200px;height: auto;/* padding: 10px 20px 10px 20px; */
}.pre_files_data > ul {list-style: none;
}
.pre_files_data > ul > li {border: 1px solid black;
}
.pre_files_data > ul > li > span {margin-left: 5px;
}.pre_dataintable {margin-top: 15px;border-collapse: collapse;border: 1px solid #aaa;width: 95%;/* padding 没有作用 *//* padding: 0px 5px 10px 5px; */position: relative;left: 2%;
}
.pre_dataintable th {vertical-align: baseline;padding: 5px 15px 5px 6px;background-color: #c1ffc1;border: 1px solid #3f3f3f;text-align: left;color: #000000;font-size: 16px;font-weight: bolder;
}
.pre_dataintable td {vertical-align: text-top;padding: 6px 15px 6px 6px;border: 1px solid #aaa;
}
.pre_dataintable tr:nth-child(odd) {background-color: #f5f5f5;
}
.pre_dataintable tr:nth-child(even) {background-color: #fff;
}.pre_tab_name {cursor: pointer;
}
.pre_tab_name:hover {cursor: pointer;background-color: #aaa;
}
/* 全部取消按钮 */
.pre_btn_del_all {color: crimson;font-weight: bold;font-size: 16px;width: 100px;height: 30px;
}
/* 上传按钮 */
.pre_btn_up {color: chartreuse;font-weight: bold;font-size: 16px;width: 100px;height: 30px;
}
/* 删除按钮 */
.pre_btn_canle {color: crimson;font-weight: bold;font-size: 16px;width: 80px;height: 25px;
}
.pre_show_img {width: 400px;height: 400px;text-align: center;margin-top: -40px;/* background-color: #000000; */
}
.pre_show_img > img {width: auto;height: 100%;
}
</style>