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
html
<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.data
let 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.data
if (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
js
/** 提交按钮 */
function submitForm() {
proxy.$refs["editForm"].validate(valid => {
if (valid) {
// 获取子组件的fileList
form.value.files = proxy.$refs.upload.fileList
if (!Array.isArray(form.value.files) || form.value.files.length <= 0) {
proxy.$alert("请上传文件");
return false;
}
//增加了多个文件属性字段
form.value.download = form.value.files[0].url
form.value.name = form.value.files[0].name
form.value.userName = form.value.files[0].user
form.value.md5 = form.value.files[0].md5
form.value.size = form.value.files[0].size
save(form.value).then(() => {
proxy.$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。