vue+elementui 实现上传文件/导入文件的功能示例详解

<el-form-item label="上传文件：">
  <el-upload
    action=""
    :file-list="fileList"
    :show-file-list="false"
    :http-request="handUpLoad"
    drag
    :limit="1"
    :accept="'.xls, .xlsx'"
  >
    <i class="el-icon-upload" />
    <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
  </el-upload>
  <ul class="downloadFile">
    <li v-for="(val, index) in fileList" :key="index">
    <a class="el-upload-list__item-name" href="javascript:;" rel="external nofollow" ><i class="el-icon-document" />{{ val.fileName }}</a>
    <i class="el-icon-close" @click="handleFileRemove(val)" />
    </li>
    <li v-show="fileLoading"><i class="loading el-icon-loading" /> </li>
  </ul>
</el-form-item>

data() {
  return {
    fileList: [],
    fileLoading: false,
    fileobj: ''
  }
}

handUpLoad(fileobj) {
  this.fileobj = fileobj
  this.fileList = [{
    fileName: fileobj.file.name,
    fileSize: fileobj.file.size
  }]
}

submit() {
  if (this.fileList.length === 0) {
    this.$message({
      message: '请先上传文件',
      type: 'warning'
    })
    return
  }
  const param = new FormData()
  param.append('file', this.fileobj.file)
  // 调用上传文件的方法--fileImport
  fileImport(param).then(res => {
    this.$message({
      type: 'success',
      message: '上传成功'
    })
  }).catch(err => {
    this.$message.error(err)
  }).finally(() => {
    this.$emit('refresh')
  })
 }

handleFileRemove() {
  this.fileList = []
}