vue3中常用组件封装及使用

文件上传

属性与方法

<!-- 属性1. multiple多选2. action上传文件服务器地址3. before-upload上传前校检格式和大小4. file-list上传的文件列表5. limit数量限制6. on-error上传失败触发7. on-exceed文件个数超出触发8. on-success上传成功触发9. show-file-list是否显示已上传文件列表(我这块点击文件名要展示文件，所以自定义了一个文件列表，加了触发事件)10.headers 设置上传的请求头部-->

完整代码

<template><div class="upload-file"><el-upload multiple :action="uploadFileUrl" :before-upload="handleBeforeUpload" :file-list="fileList" :limit="limit":on-error="handleUploadError" :on-exceed="handleExceed" :on-success="handleUploadSuccess" :show-file-list="false":headers="headers" class="upload-file-uploader" ref="fileUpload"><!-- 上传按钮 --><el-button type="primary">选取文件</el-button></el-upload><!-- 上传提示 --><div class="el-upload__tip" v-if="showTip">请上传<template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template><template v-if="fileType"> 格式为 <b class="auto-wrap">{{ fileType.join("/") }}</b> </template>的文件</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"><li :key="file.uid" class="el-upload-list__item ele-upload-list__item-content" v-for="(file, index) in fileList"><!-- 打开新窗口预览文件 --><el-link :href="`${baseUrl}${file.url}`" :underline="false" target="_blank"><span class="el-icon-document"> {{ file.name }} </span></el-link><div class="ele-upload-list__item-content-action"><el-link :underline="false" @click="handleDelete(index)" type="danger">删除</el-link></div></li></transition-group></div>
</template><script setup>
import { getToken } from "@/utils/auth";const props = defineProps({modelValue: [String, Object, Array], //默认文件列表数据// 数量限制limit: {type: Number,default: 5,},// 大小限制(MB)fileSize: {type: Number,default: 500,},// 文件类型, 例如['png', 'jpg', 'jpeg']fileType: {type: Array,default: () => ["doc", "xls", "ppt", "txt", "pdf"],},// 是否显示提示isShowTip: {type: Boolean,default: true}
});const { proxy } = getCurrentInstance();
const emit = defineEmits();
const number = ref(0); // 只要通过上传校验就给number+1；上传成功一个-1个，都上传成功后重置为0
const uploadList = ref([]);
const baseUrl = import.meta.env.VITE_APP_BASE_API; //访问的文件前缀
const uploadFileUrl = ref(import.meta.env.VITE_APP_BASE_API + "/common/upload4model"); // 上传文件服务器地址
const headers = ref({ Authorization: "Bearer " + getToken() });
const fileList = ref([]);
const showTip = computed(() => props.isShowTip && (props.fileType || props.fileSize)
);watch(() => props.modelValue, val => {if (val) {let temp = 1;// 首先将值转为数组const list = Array.isArray(val) ? val : props.modelValue.split(',');// 然后将数组转为对象数组fileList.value = list.map(item => {if (typeof item === "string") {item = { name: item, url: item };}if (!item.url) {item.url = baseUrl + item.fileName;}item.uid = item.uid || new Date().getTime() + temp++;return item;});} else {fileList.value = [];return [];}
}, { 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.length) {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 ${props.fileSize} MB!`);return false;}}// proxy.$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！`);
}// 上传失败
function handleUploadError(err) {proxy.$modal.msgError("上传文件失败");
}// 上传成功回调
function handleUploadSuccess(res, file) {if (res.code === 200) {uploadList.value.push(res);uploadedSuccessfully();} else {number.value--;// proxy.$modal.closeLoading();proxy.$modal.msgError(res.msg);proxy.$refs.fileUpload.handleRemove(file); // 上传失败时手动触发组件的外部方法handleRemoveuploadedSuccessfully();}
}// 删除文件
function handleDelete(index) {fileList.value.splice(index, 1);emit("update:modelValue", fileList.value); // 删除文件后更新父组件文件列表
}// 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:modelValue", fileList.value); //更新父组件文件列表fileList数据// proxy.$modal.closeLoading();}
}</script><style scoped lang="scss">
.upload-file-uploader {margin-bottom: 5px;
}.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;
}.auto-wrap {width: 100%;word-wrap: break-word;/* 旧版本浏览器支持 */overflow-wrap: break-word;/* 标准属性 */word-break: break-all;color: #f56c6c;
}
</style>

组件使用

<!-- 1. modelValue对应的文件列表数据2. limit限制文件上传数量3. fileType限制上传的文件类型4. @update:modelValue更新文件列表数据
-->
<FileUpload :modelValue="form.attachmentList" @update:modelValue="fileUploadInput":fileType="fileType[form.dataType]" :limit="form.dataType == 2 ? 20 : 1"></FileUpload>