【篇三】在vue3上实现阿里云oss文件直传

之前写了两篇关于文件上传的文章
【篇一】使用springboot+vue实现阿里云oss上传
【篇二】使用springboot+vue实现阿里云oss文件直传，解决大文件分片上传问题
今天介绍一下在vue3中实现阿里云oss文件直传，主要是基于篇二中的源码进行修改，看具体代码

OssFileUpload组件

<template><div class="upload-file"><el-upload:multiple="multiple":accept="accept.join(',')"action="#":http-request="handleUpload":before-upload="handleBeforeUpload":file-list="fileList":limit="limit":on-exceed="handleExceed":show-file-list="false":data="data"class="upload-file-uploader"ref="fileUpload"><!-- 上传按钮 --><el-button type="primary">选取文件</el-button><template v-if="multiple"> （按住Ctrl键多选）</template></el-upload><!-- 上传提示 --><div class="el-upload__tip" slot="tip" v-if="showTip && fileList.length<=0"><span v-if="limit"> 1、文件数量限制为 <b style="color: #f56c6c">{{ limit }}个</b></span><span v-if="fileSize"> 2、文件大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b><br></span><span v-if="fileType"> 3、文件格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b><br></span></div><!-- 文件列表 --><transition-group class="upload-file-list el-upload-list el-upload-list--text" name="el-fade-in-linear" tag="ul" height="485"><li v-for="(file, index) in fileList" :key="file.uid || index " class="el-upload-list__item ele-upload-list__item-content"><el-link :href="file.url" :underline="false" target="_blank"><span class="`el-icon-d`ocument"> {{ file.name }} </span></el-link><div class="ele-upload-list__item-content-action"><el-link :underline="false" @click="handleDelete(index)" type="danger" style="width: 50px">删除</el-link></div></li></transition-group></div>
</template><script setup>
import {handleMD5} from '@/utils/md5';
import {generateOssPolicy} from "@/api/file/file";
import {POST} from "@/utils/request";const props = defineProps({// 是否可多选multiple: {type: Boolean,default: true,},// 值value: [String, Object, Array],// 数量限制limit: {type: Number,default: 5,},// 大小限制(MB)fileSize: {type: Number,default: 5,},// 文件类型, 例如['png', 'jpg', 'jpeg']fileType: {type: Array,default: () => ["doc", "xls", "xlsx", "ppt", "txt", "pdf"],},accept: {type: Array,default: () => [".doc", ".xls", ".xlsx", ".ppt", ".txt", ".pdf"],},// 是否显示提示isShowTip: {type: Boolean,default: true},// 是否重命名rename: {type: Boolean,default: true}
});const {proxy} = getCurrentInstance();
const emit = defineEmits();
const number = ref(0);
const uploadList = ref([]);
const fileList = ref([]);
const data = ref({});
const showTip = computed(() => props.isShowTip && (props.fileType || props.fileSize)
);
watch(() => [props.value, props.rename], ([val1, val2]) => {if (val1) {let temp = 1;// 首先将值转为数组const list = Array.isArray(val1) ? val1 : props.value.split(',');// 然后将数组转为对象数组fileList.value = list.map(item => {if (typeof item === "string") {item = {name: item.name, url: item.url};}item.uid = item.uid || new Date().getTime() + temp++;return item;});} else {fileList.value = [];return [];}if (val2) {data.value = {rename: val2}}
}, {deep: true, immediate: true});// 上传前校检格式和大小
function handleBeforeUpload(file) {// 校检文件类型if (props.fileType) {const fileName = file.name.split('.');const fileExt = fileName[fileName.length - 1];const isTypeOk = props.fileType.indexOf(fileExt) >= 0;if (!isTypeOk) {proxy.$modal.msgError(`文件格式不正确, 请上传${props.fileType.join("/")}格式文件!`);return false;}}// 校检文件大小if (props.fileSize) {const isLt = file.size / 1024 / 1024 < props.fileSize;if (!isLt) {proxy.$modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`);return false;}}//增加判断逻辑：如果是视频文件，获取视频分辨率const isVideo = file.type === "video/mp4" || file.type === "video/webm";if (isVideo) {// 创建一个视频元素const video = document.createElement('video');video.preload = 'metadata';// 设置视频源video.src = URL.createObjectURL(file);// 监听加载元数据完成video.onloadedmetadata = () => {URL.revokeObjectURL(video.src); // 释放URL对象const width = video.videoWidth;const height = video.videoHeight;// 获取视频时长const duration = video.duration;file.width = width;file.height = height;file.duration = duration;// 这里可以根据分辨率做进一步处理，例如检查分辨率是否符合要求};}proxy.$modal.loading("正在上传文件，请稍候...");number.value++;return true;
}// 文件个数超出
function handleExceed() {proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
}// 删除文件
function handleDelete(index) {fileList.value.splice(index, 1);emit("update:value", listToString(fileList.value));
}// 上传结束处理
function uploadedSuccessfully() {if (number.value > 0 && uploadList.value.length === number.value) {fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value);uploadList.value = [];number.value = 0;emit("update:value", listToString(fileList.value));proxy.$modal.closeLoading();}
}/** 上传操作 */
function handleUpload(file) {handleMD5(file.file).then(md5 => {const data = {fileName: file.file.name,md5: md5,rename: props.rename// 增加视频的分辨率、播放时长，后端接收后再通过回调接口返回，前端即可获取width: file.file.width,height: file.file.height,duration: file.file.duration,};generateOssPolicy(data).then((response) => {let data = response.datalet formData = new FormData();formData.append('OSSAccessKeyId', data.accessKeyId);formData.append('signature', data.signature);formData.append('policy', data.policy);formData.append('key', data.filePath);formData.append('callback', data.callback);formData.append('success_action_status', 200);formData.append('file', file.file);POST(data.host, formData).then((res) => {let params = res.dataif (params.code !== 200) {proxy.$modal.msgError(params.msg);return;}uploadList.value.push(params.data);uploadedSuccessfully();proxy.$modal.msgSuccess("上传成功");});})})
}// 获取文件名称
function getFileName(name) {if (name.lastIndexOf("/") > -1) {return name.slice(name.lastIndexOf("/") + 1);} else {return "";}
}// 对象转成指定字符串分隔
function listToString(list, separator) {let str = "";separator = separator || ",";for (let i in list) {str += list[i].url + separator;}return str !== '' ? str.substring(0, str.length - 1) : '';
}//暴露给父组件，否则无法获取值
defineExpose({fileList
})
</script><style scoped lang="scss">
.upload-file-uploader {margin-bottom: 5px;
}
.upload-file-list {max-height: 420px;overflow-y: auto;
}
.el-upload__tip span {display: block;width: fit-content;line-height: 20px;
}
.upload-file-list .el-upload-list__item {border: 1px solid #e4e7ed;line-height: 2;margin-bottom: 10px;position: relative;
}
.upload-file-list .ele-upload-list__item-content {display: flex;justify-content: space-between;align-items: center;color: inherit;
}
.ele-upload-list__item-content-action .el-link {margin-right: 10px;
}
</style>

父组件引用

/** 提交按钮 */
function submitForm() {proxy.$refs["editForm"].validate(valid => {if (valid) {// 获取子组件的fileListform.value.files = proxy.$refs.upload.fileListif (!Array.isArray(form.value.files) || form.value.files.length <= 0) {proxy.$alert("请上传文件");return false;}//增加了多个文件属性字段form.value.download = form.value.files[0].urlform.value.name = form.value.files[0].nameform.value.userName = form.value.files[0].userform.value.md5 = form.value.files[0].md5form.value.size = form.value.files[0].sizesave(form.value).then(() => {proxy.$modal.msgSuccess("操作成功");open.value = false;getList();});}});
}

后端代码除组装callbackBody增加了几个参数外，逻辑基本相同，故省略。