基于ElementUI封装Excel数据导入组件

由于前端项目使用的是Vue-cli3.0 + TypeScript的架构，所以该组件也是基于ts语法封装的，组件的完整代码如下：

<template>
  <div id="myImport">
    <el-button type="primary" plain @click="importDialogVisible = true">导入</el-button>
    <!-- 导入弹窗 -->
    <el-dialog :title="name + '导入'" :visible.sync="importDialogVisible" width="560px"
          :close-on-click-modal="false" @close="fileList = []">
      <div>
        <div style="color: #2D2D2D;margin-bottom: 20px;">导入文件</div>
        <el-upload class="upload-demo"
            ref="upload"
            :action="url"
            name="excelFile"
            :headers="importHeaders"
            :on-change="changeUpload"
            :on-success="uploadSuccess"
            :file-list="fileList"
            :limit="1"
            :multiple="false"
            :auto-upload="false"
          >
            <el-button slot="trigger" type="primary">选取文件</el-button>
            <div slot="tip" class="el-upload__tip"></div>
        </el-upload>
        <br><br>
        <div><span style="color: #5C5C5C;font-size: 12px;border-bottom: 1px solid #5C5C5C;">{{name + '模板下载'}}</span></div>
        <el-button style="position: relative;right: -420px;" type="primary" @click="submitUpload">导入</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script lang="ts">
import { Component, Prop, Emit, Vue, Ref } from 'vue-property-decorator'

@Component
export default class MyImport extends Vue {
  @Prop({ default: '' }) private url!: string
  @Prop({ default: '' }) private name!: string

  private importDialogVisible: boolean = false
  private importHeaders: Object = {'token': sessionStorage.getItem('token')}
  private fileList: Array<any> = []

  @Ref() readonly upload!: any

  public changeUpload(file: File, fileList: Array<any>) {
    let index: number = file.name.lastIndexOf('.')
    let suffix: string = file.name.substring(index + 1).toUpperCase()
    if (suffix !== 'XLS' && suffix !== 'XLSX') {
      this.$message.error('只支持导入execl文件')
      this.upload.clearFiles()
      return false
    }
    this.fileList = fileList
  }

  public submitUpload() {
    if(this.fileList.length == 0) {
      this.$message.error('请选择要导入的文件')
      return false
    }
    this.upload.submit()
  }

  @Emit('uploadSuccess')
  public uploadSuccess(res: any) {
    this.importDialogVisible = false;
    return res
  }
}
</script>

<style lang="scss">
  #myImport {
    display: inline-block;
    margin-left: 10px;
    .el-dialog {
      text-align: initial;
      .el-dialog__header {
        background-color: #824C96;
        padding: 6px;
        .el-dialog__title {
          color: #fff;
          font-size: 14px;
          margin-left: 10px;
        }
        .el-dialog__close {
          color: #fff;
          position: relative;
          top: -10px;
          right: -10px;
        }
      }
    }
  }
</style>

Vue与ts集成的语法风格请查看vue-property-decorator官方文档。

具体应用呢就是在对应的.vue文件引入该组件，假设组件名称为my-import，然后在页面对应位置加入以下代码：

　　　 <div class="btn-item">
        <el-button type="primary">查询</el-button>
        <el-button type="primary" plain>重置</el-button>
        <el-button type="primary" plain>导出</el-button>
        <!--导入组件-->
        <my-import :url="url" :name="name" @uploadSuccess="uploadSuccess"></my-import>
      </div>

其中url为后台导入接口路径，name为导入信息名称，uploadSuccess为导入成功的回调。

代码运行后的展示效果如下：