vue中element-ui使用axios上传文件
本文实例为大家分享了vue中element-ui使用axios上传文件的具体代码,供大家参考,具体内容如下
环境:vue2.5.6+axios0.18.1+element-ui2.15.1
在使用element UI的upload组件上传文件时,遇到一些问题,网上的说法不尽如是,在此记录
其实最主要的估计就是axios相关的问题,因我们平时开发的vue项目都是封装过axios后进行api的调用,但上传操作跟一般的api请求不同,所有总是报错,故需要建立新的axios实例。
文件上传类型可以在el-upload的accept中进行定义,上传时会进行一定的过滤。
例如图片类型:accept=".png, .jpeg"
1. 封装上传文件的axios实例
import Vue from "vue"; import axios from "axios"; const instance = axios.create({ baseURL: "http://localhost:8080", // 后台地址 withCredentials: false, timeout: 10000 }); Vue.prototype.axiosUpload = instance;
2. 封装vue组件
<template> <el-dialog :title="title" :visible.sync="upLoadVisible" width="30%" @close="closeDialog"> <div class="upload-box"> <el-upload ref="upload" drag class="upload-demo" accept=".xls,.xlsx" action="#" :limit="1" :on-preview="handlePreview" :on-remove="handleRemove" :file-list="fileList" :auto-upload="false" :before-upload="beforeUpload" :http-request="uploadHttpRequest" > <i class="el-icon-upload" /> <div class="el-upload__text"> 将文件拖到此处,或<em style="color: #409eff">点击上传</em> </div> <div slot="tip" class="el-upload__tip"> 只能上传xls/xlxs文件, 文件大小不超过10M </div> </el-upload> <el-progress v-if="processVisible" :percentage="processPercent" :text-inside="true" :stroke-width="24" :status="processStatus" style="margin: 20px 0;" /> <el-alert v-if="tipVisible" :title="tipTitle" type="error" @close="tipVisible = false" /> <el-button style="margin: 10px 0;" icon="el-icon-upload2" size="small" type="primary" :loading="uploading" @click="submitUpload" > 上传到服务器 </el-button> <el-button style="margin-left: 0" icon="el-icon-circle-close" size="small" @click="cancelUpload" > 取 消 </el-button> </div> </el-dialog> </template> <script> export default { props: { title: { type: String, default: "上传文件" }, upLoadVisible: { type: Boolean, default: false }, uploadUrl: { // 上传文件的api type: String, default: "" } }, data() { return { fileList: [], uploading: false, processPercent: 5, processStatus: 'success', processVisible: false, tipVisible: false, tipTitle: '', timer: null }; }, methods: { // 上传文件之前的钩子:判断上传文件格式、大小等,若返回false则停止上传 beforeUpload(file) { // 文件类型 const isType = file.type === "application/vnd.ms-excel"; const isTypeComputer = file.type === "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; const fileType = isType || isTypeComputer; if (!fileType) { this.$message.error("上传文件只能是xls/xlsx格式!"); } // 文件大小限制为10M const fileLimit = file.size / 1024 / 1024 < 10; if (!fileLimit) { this.$message.error("上传文件大小不超过10M!"); } return fileType && fileLimit; }, // 自定义上传方法,param是默认参数,可以取得file文件信息,具体信息如下图 async uploadHttpRequest(param) { const that = this; this.uploading = true; // 显示按钮加载中 this.processVisible = true; // 显示进度条 this.processPlus(); // FormData对象,添加参数只能通过append('key', value)的形式添加 const formData = new FormData(); // 添加文件对象 formData.append("file", param.file); const config = { headers: { "Content-Type": "multipart/form-data" } }; this.axiosUpload.post(this.uploadUrl, formData, config).then(res => { // 这里的res需根据后台返回情况判断 if (res.data.code === 200) { this.processPercent = 100; that.uploading = false; this.processVisible = false; this.timer = null; that.$emit("closeUpload"); that.$message.success(res.data.msg); } else { this.processPercent = 100; this.processStatus = "exception"; this.tipVisible = true; this.tipTitle = res.data.msg; this.uploading = false; } }).catch(reject => { console.log(reject) }) }, // 上传至服务器 submitUpload() { this.$refs.upload.submit(); }, handleRemove(file, fileList) { console.log(file, fileList); }, handlePreview(file) { console.log(file); }, cancelUpload() { this.$refs.upload.clearFiles(); // 清除上传文件对象 this.fileList = []; // 清空选择的文件列表 this.$emit("closeUpload"); }, // 前期进度条增加 processPlus() { this.timer = setInterval(() => { if (this.processPercent < 90) { this.processPercent += 10; } }, 200) }, closeDialog() { this.$emit('closeUploadDialog'); } } }; </script> <style scoped> .upload-box { display: flex; flex-direction: column; justify-content: center; } .upload-demo { display: flex; flex-direction: column; align-items: center; } </style>
3 效果
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
赞 (0)