Vue实现数据导出导入实战案例

   "dependencies": {  
    "element-ui": "2.10.1",
    "export2excel": "0.0.1",
    "file-saver": "^2.0.5",
    "vue": "^2.5.2",
    "vue-router": "^3.0.1",
    "xlsx": "^0.17.0"
  },

 npm install export2excel@0.0.1 --save #导出到excel依赖包 
 npm install file-saver@2.0.5 --save #文件保存到客户端
 npm install xlsx@0.17.0 --save #操作excel依赖包

<template>
  <div class="hello">
    <h1>{{ msg }}</h1>
    <el-row>
      <el-button size="small" type="primary" @click="exportTest">导出</el-button>
      <el-upload action="/" :on-change="importTest" :show-file-list="false"
        accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/vnd.ms-excel"
        :auto-upload="false">
        <el-button size="small" icon="el-icon-upload" type="primary">导入数据</el-button>
      </el-upload>
 
    </el-row>
    <el-row>
      <el-table ref="multipleTable" style="padding-top: 10px;" :data="listData" tooltip-effect="light"
        highlight-current-row :header-cell-style="{
          background: '#E6EAF3',
          'font-size': '13px',
          padding: '0px',
          height: '40px',
        }" v-loading="listLoading" :cell-style="{ 'font-size': '13px', padding: '0px', height: '34px' }">
        <el-table-column label="序号" type="index" width="50"></el-table-column>
        <el-table-column label="姓名" show-overflow-tooltip width="110">
          <template slot-scope="scope">{{ scope.row.name }}</template>
        </el-table-column>
        <el-table-column label="年龄" show-overflow-tooltip width="">
          <template slot-scope="scope">{{ scope.row.age }}</template>
        </el-table-column>
 
      </el-table>
    </el-row>
  </div>
</template>
 
<script>
import { export_json_to_excel } from "@/vendor/Export2Excel";
import Xlsx from 'xlsx'
export default {
  name: 'HelloWorld',
  data() {
    return {
      msg: '导入导出测试',
      listData: [
        { name: "小明", age: 30 },
        { name: "小张", age: 25 },
        { name: "小李", age: 29 }
      ],
      listLoading: false,
      xlscTitle: {
        "姓名": "name",
        "年龄": "age"
      },   
    }
  },
  methods: {
    exportTest() {
      const header = [
        "姓名",
        "年龄"
      ];
      const body = [
        "name",
        "age",
      ];
      const data = this.formatJson(body, this.listData);
      console.log(data);
      export_json_to_excel({
        header: header,// 表头
        data: data, // 数据列表
        filename: "用户表",// 保存文件名
      });
    },
    //格式化json数据为导出数据 过滤掉查询的数据列不在导出的列里面的数据
    formatJson(filterVal, jsonData) {
      return jsonData.map((a) => filterVal.map((b) => a[b]));
    },
    importTest(file) {
      let self = this;
      const types = file.name.split('.')[1];
      const fileType = ['xlsx', 'xlc', 'xlm', 'xls', 'xlt', 'xlw', 'csv'].some(item => {
        return item === types
      });
      if (!fileType) {
        this.$message.error('文件格式错误，请重新选择文件！')
      }
      this.file2Xce(file).then(tab => {        
        // 过滤，转化正确的JSON对象格式
        if (tab && tab.length > 0) {
          tab[0].sheet.forEach(item => {
            let obj = {};
            for (let key in item) {
              obj[self.xlscTitle[key]] = item[key];
            }
            self.listData.push(obj);
          });         
          if (self.listData.length) {
            this.$message.success('上传成功')
            // 获取数据后，下一步操作
          } else {
            this.$message.error('空文件或数据缺失，请重新选择文件！')
          }
        }
      })
    },
 
    // 读取文件
    file2Xce(file) {
      return new Promise(function (resolve, reject) {
        const reader = new FileReader();
        reader.onload = function (e) {
          const data = e.target.result;
          //var Xlsx = require("xlsx");
          this.wb = Xlsx.read(data, {
            type: "binary"
          });
          const result = [];
          this.wb.SheetNames.forEach(sheetName => {
 
            result.push({
              sheetName: sheetName,
              sheet: Xlsx.utils.sheet_to_json(this.wb.Sheets[sheetName])
            })
          })
          resolve(result);
        }
        reader.readAsBinaryString(file.raw);
      })
    }
  }
}
</script>
 
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h1,
h2 {
  font-weight: normal;
}
 
ul {
  list-style-type: none;
  padding: 0;
}
 
li {
  display: inline-block;
  margin: 0 10px;
}
 
a {
  color: #42b983;
}
</style>