yarn add xlsx

*将vue-element-admin提供的导入功能新建一个组件，位置： src/components/UploadExcel*

import UploadExcel from './UploadExcel'
export default {
  install(Vue) {
 Vue.component('UploadExcel', UploadExcel) // 注册导入excel组件
  }
}

<template>
 <div class="upload-excel">
    <div class="btn-upload">
      <el-button :loading="loading" size="mini" type="primary" @click="handleUpload">
        点击上传
      </el-button>
    </div>

    <input ref="excel-upload-input" class="excel-upload-input" type="file" accept=".xlsx, .xls" @change="handleClick">
    <div class="drop" @drop="handleDrop" @dragover="handleDragover" @dragenter="handleDragover">
      <i class="el-icon-upload" />
      <span>将文件拖到此处</span>
    </div>
  </div>
</template>
<style scoped lang="scss">
.upload-excel {
  display: flex;
  justify-content: center;
   margin-top: 100px;
   .excel-upload-input{
       display: none;
        z-index: -9999;
     }
   .btn-upload , .drop{
      border: 1px dashed #bbb;
      width: 350px;
      height: 160px;
      text-align: center;
      line-height: 160px;
   }
   .drop{
       line-height: 80px;
       color: #bbb;
      i {
        font-size: 60px;
        display: block;
      }
   }
}
</style>

<template>
  <div class="upload-excel">
    <div class="btn-upload">
      <el-button
        :loading="loading"
        size="mini"
        type="primary"
        @click="handleUpload"
      >
        点击上传
      </el-button>
    </div>

    <input
      ref="excel-upload-input"
      class="excel-upload-input"
      type="file"
      accept=".xlsx, .xls"
      @change="handleClick"
    />
    <div
      class="drop"
      @drop="handleDrop"
      @dragover="handleDragover"
      @dragenter="handleDragover"
    >
      <i class="el-icon-upload" />
      <span>将文件拖到此处</span>
    </div>
  </div>
</template>

<script>
/* eslint-disable */
import XLSX from "xlsx";

export default {
  props: {
    beforeUpload: Function, // eslint-disable-line
    onSuccess: Function, // eslint-disable-line
  },
  data() {
    return {
      loading: false,
      excelData: {
        header: null,
        results: null,
      },
    };
  },
  methods: {
    generateData({ header, results }) {
      this.excelData.header = header;
      this.excelData.results = results;
      this.onSuccess && this.onSuccess(this.excelData);
    },
    handleDrop(e) {
      e.stopPropagation();
      e.preventDefault();
      if (this.loading) return;
      const files = e.dataTransfer.files;
      if (files.length !== 1) {
        this.$message.error("Only support uploading one file!");
        return;
      }
      const rawFile = files[0]; // only use files[0]

      if (!this.isExcel(rawFile)) {
        this.$message.error(
          "Only supports upload .xlsx, .xls, .csv suffix files"
        );
        return false;
      }
      this.upload(rawFile);
      e.stopPropagation();
      e.preventDefault();
    },
    handleDragover(e) {
      e.stopPropagation();
      e.preventDefault();
      e.dataTransfer.dropEffect = "copy";
    },
    handleUpload() {
      this.$refs["excel-upload-input"].click();
    },
    handleClick(e) {
      const files = e.target.files;
      const rawFile = files[0]; // only use files[0]
      if (!rawFile) return;
      this.upload(rawFile);
    },
    upload(rawFile) {
      this.$refs["excel-upload-input"].value = null; // fix can't select the same excel

      if (!this.beforeUpload) {
        this.readerData(rawFile);
        return;
      }
      const before = this.beforeUpload(rawFile);
      if (before) {
        this.readerData(rawFile);
      }
    },
    readerData(rawFile) {
      this.loading = true;
      return new Promise((resolve, reject) => {
        const reader = new FileReader();
        reader.onload = (e) => {
          const data = e.target.result;
          const workbook = XLSX.read(data, { type: "array" });
          const firstSheetName = workbook.SheetNames[0];
          const worksheet = workbook.Sheets[firstSheetName];
          const header = this.getHeaderRow(worksheet);
          const results = XLSX.utils.sheet_to_json(worksheet);
          this.generateData({ header, results });
          this.loading = false;
          resolve();
        };
        reader.readAsArrayBuffer(rawFile);
      });
    },
    getHeaderRow(sheet) {
      const headers = [];
      const range = XLSX.utils.decode_range(sheet["!ref"]);
      let C;
      const R = range.s.r;
      /* start in the first row */
      for (C = range.s.c; C <= range.e.c; ++C) {
        /* walk every column in the range */
        const cell = sheet[XLSX.utils.encode_cell({ c: C, r: R })];
        /* find the cell in the first row */
        let hdr = "UNKNOWN " + C; // <-- replace with your desired default
        if (cell && cell.t) hdr = XLSX.utils.format_cell(cell);
        headers.push(hdr);
      }
      return headers;
    },
    isExcel(file) {
      return /\.(xlsx|xls|csv)$/.test(file.name);
    },
  },
};
</script>

<style scoped lang="less">
.upload-excel {
  display: flex;
  justify-content: center;
  margin-top: 100px;
  .excel-upload-input {
    display: none;
    z-index: -9999;
  }
  .btn-upload,
  .drop {
    border: 1px dashed #bbb;
    width: 350px;
    height: 160px;
    text-align: center;
    line-height: 160px;
  }
  .drop {
    line-height: 80px;
    color: #bbb;
    i {
      font-size: 60px;
      display: block;
    }
  }
}
</style>

新建一个公共的导入页面，挂载路由 src/router/index.js

{
    path: '/import',
    component: Layout,
    children: [{
      path: '', // 二级路由path什么都不写 表示二级默认路由
      component: () => import('@/views/import')
    }]
  },

创建import路由组件 src/views/import/index.vue

<template>
  <!-- 公共导入组件 --> 
  <upload-excel :on-success="handleSuccess" />
</template>

封装excel导入数据接口

/** *
 *  封装一个导入数据的接口
 *
 * ***/

export function importEmployee(data) {
  return request({
    url: '/sys/user/batch',
    method: 'post',
    data
  })
}

<template>
  <div>
    <!-- 这里绑定要执行的函数,此页面看需求,可封装组件,也可用dlog等弹窗,具体看需求修改,逻辑代码通用 -->
    <UploadExcel :on-success="handleSuccess"></UploadExcel>
  </div>
</template>

<script>
// 导入数据的接口,引入具体路径
import { importEmployee } from "@/api/setting";  
export default {
  name: "ImportPage",
  components: {},
  data() {
    return {};
  },
  created() {},
  mounted() {},
  computed: {},
  methods: {
    async handleSuccess({ results }) {
      // (1)数据来源
      // header = ['手机号', '姓名', '入职日期', '转正日期', '工号'] 头部,可修改成自己的需求
      // results = [{"手机号":13941130879,"姓名":"高大山","入职日期":43535,"转正日期":43719,"工号":20089}]  上传提交的结果,是中文,需要进行处理转换
      // (2)数据转换目标,转成和后台接口所对应的英文
      // arr = [{"mobile":13941130879,"username":"高大山","timeOfEntry":43535,"correctionTime":43719,"workNumber":20089}]
      const userRelations = {
        // 此数组表示excel中文名,所对应的后台英文名称,可根据接口进行修改适配
        入职日期: "timeOfEntry",
        手机号: "mobile",
        姓名: "username",
        转正日期: "correctionTime",
        工号: "workNumber",
      };
    //  遍历所有的数组
      let arr = [];
      results.forEach((t) => {
         // 需要将每一个条数据里面的中文都换成英文
        let item = {};
         // key是当前的中文名 找到对应的英文名
        Object.keys(t).forEach((key) => {
          let value = t[key];
          // console.log(key, value);
          let newKey = userRelations[key];
          item[newKey] = value;
        });
        arr.push(item);
      });
      console.log(arr);
  
      try {
        await importEmployee(arr);
        this.$message.success("导入成功");
        this.$router.back();
      } catch (e) {
        this.$message.error("导入失败");
        console.log(e);
      }
    },
    // 当excel中有日期格式的时候，实际转化的值为一个数字，我们需要一个方法进行转化
    formatDate(numb, format) {
      const time = new Date((numb - 1) * 24 * 3600000 + 1);
      time.setYear(time.getFullYear() - 70);
      const year = time.getFullYear() + "";
      const month = time.getMonth() + 1 + "";
      const date = time.getDate() - 1 + "";
      if (format && format.length === 1) {
        return year + format + month + format + date;
      }
      return (
        year +
        (month < 10 ? "0" + month : month) +
        (date < 10 ? "0" + date : date)
      );
    },
  },
};
</script>

<style lang="less" scoped>
</style>