安装：  npm install xlsx  --save

vue组件引入： import XLSX from "xlsx";

代码

<el-upload
          class="upload"
          :show-file-list="false"
          action=""
          :multiple="false"
          accept="application/vnd.ms-excel, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
          :on-change="importExcel"
          :limit="1"
        >
          <el-button size="small" type="primary">上传</el-button>
</el-upload>

methods: {
  // 导入表格
    importExcel(param) {
      // console.log(param);
      let _this = this;
      _this.file2Xce(param).then(item => {
        if (item && item.length > 0) {
          // xlsxJson就是解析出来的json数据,数据格式如下
          // [{sheetName: sheet1, sheet: sheetData }]
          if (item[0] && item[0].sheet && item[0].sheet.length) {
            _this.tableData = item[0].sheet  //把数据塞到表格预览
          }
        }
      })
      .catch(error => {
        loading.close();
      });
    },
    /**
     * 解析文件
     * @param {Object} file
     */
    file2Xce(file) {
      return new Promise(function(resolve, reject) {
        const reader = new FileReader();
        reader.onload = function(e) {
          const data = e.target.result;
          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])
            });
          });
          /* console.log("解析")
          console.log(result) */
          resolve(result);
        };
        reader.readAsBinaryString(file.raw);
      });
    }

}