taicang-visitor/src/components/FileUpload/index.vue

<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="upload"
    >
      <!-- 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 style="color: #f56c6c">{{ 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">
        <el-link :href="file.url" :underline="false" target="_blank">
          <span class="el-icon-document"> {{ file.name || file.url }} </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: {
    type: [String, Object, Array],
    default: "",
  },
  // 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", "ppt", "txt", "pdf"],
    default: () => [],
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true,
  },
});

const { proxy } = getCurrentInstance();
const emit = defineEmits();
const uploadFileUrl = ref(import.meta.env.VITE_APP_BASE_API + "/service-file/upload"); // 上传的文件服务器地址
const headers = ref({ Authorization: localStorage.getItem("token725") });
const fileList = ref([]);
const showTip = computed(() => props.isShowTip && (props.fileType || props.fileSize));

// 删除文件
function handleDelete(index) {
  fileList.value.splice(index, 1);
  if (props.limit > 1) {
  } else {
    emit("update", listToString(fileList.value));
  }
}

// 上传成功回调
function handleUploadSuccess(res, file) {
  fileList.value.push(res.data);
  if (props.limit > 1) {
    emit("update:modelValue", fileList.value);
  } else {
    emit("update", listToString(fileList.value));
  }
  proxy.$modal.closeLoading();
}

// 上传前校检格式和大小
function handleBeforeUpload(file) {
  // 校检文件类型
  if (props.fileType.length) {
    let fileExtension = "";
    if (file.name.lastIndexOf(".") > -1) {
      fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
    }
    const isTypeOk = props.fileType.some((type) => {
      if (file.type.indexOf(type) > -1) return true;
      if (fileExtension && fileExtension.indexOf(type) > -1) return true;
      return false;
    });
    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...");
}

// 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.$modal.msgError("上传文件失败");
  proxy.$modal.closeLoading();
}

// 对象转成指定字符串分隔
function listToString(list, separator) {
  let strs = "";
  separator = separator || ",";
  for (let i in list) {
    if (undefined !== list[i].url) {
      strs += list[i].url + separator;
    }
  }
  return strs != "" ? strs.substr(0, strs.length - 1) : "";
}

watch(
  () => props.modelValue,
  (val) => {
    if (props.limit > 1) {
      fileList.value = val;
    } else {
      fileList.value = val ? [{ name: val.split("/")[val.split("/").length - 1], url: val }] : [];
    }
  },
  { deep: true, immediate: true }
);

onMounted(() => {
  if (props.modelValue) {
    fileList.value = props.limit > 1 ? props.modelValue : [{ name: props.modelValue.split("/")[props.modelValue.split("/").length - 1], url: props.modelValue }];
  }
});
</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 {
  height: 32px;
  line-height: 32px;
  padding: 0 10px 0 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}
</style>