效果

 <a-button
                  size="default"
                  style="margin-left: 10px"
                  @click="exportData"
                  >导出</a-button
                >

1.下载所需依赖

npm install xlsx --save
npm install file-saver --save

<script setup>
import { reactive, ref } from "vue";
//导入依赖
import * as XLSX from "xlsx/xlsx.mjs";
import { saveAs } from "file-saver";
import { message } from "ant-design-vue";
//导出
const exportData = () => {
  queryAllData();
};
//导出查询的所有数据
const queryAllData = async() => {
  const hide = message.loading('下载中', 0);
  //模拟要导出的数据
  let dataList = [{
   commodityName: "名称",
    classifyName: "分类",
    operationType: "STOCK",
    operationNum: "13",
    currentNum: "34",
    remarks: "备注",
    operator: "操作人",
    createTime: "2012-12-12 12:12:12",
  }];
  dataList.forEach(item => {
    item.operationType = item.operationType == 'STOCK' ? '入库' : '出库';
  })
  console.log('要导出的数据', dataList)
  // 定义表头数据
  let head = {
    commodityName: "商品名称",
    classifyName: "商品分组",
    operationType: "操作",
    operationNum: "操作数量",
    currentNum: "剩余库存",
    remarks: "备注",
    operator: "操作人",
    createTime: "操作时间",
  };
  if (dataList.length > 0) {
    // 准备表头数据
    const headers = ['商品名称', '商品分组', '操作', '操作数量', '剩余库存', '备注', '操作人', '操作时间'];
    exportDataMethods(head, dataList, true, 7, '库存明细导出', headers)
  } else {
    message.warning('暂无数据导出!')
  }
}
 //表格数据导出
  //timeCel要转换时间,时间所在的列数 timeConversion是否要转换时间
  //head  自定义表头  tableData:表格数据
  //headers 自定义表头排序
 const exportDataMethods = (head, tableData, timeConversion, timeCel, fileName, headers) => {
    const hide = message.loading('导出中...', 0);
    console.log(head, tableData, timeConversion, timeCel)
    let timecel = timeCel ? timeCel : '';
    let filename = fileName ? fileName : 'Excel';
    let cols = [];
    //表头数据切换
    let list = tableData.map((item) => {
      cols.push({ wch: 20 })
      const obj = {};
      for (const k in item) {
        if (head[k]) {
          obj[head[k]] = item[k];
        }
      }
      return obj;
    });
    // 创建一个工作表
    const ws = XLSX.utils.json_to_sheet(list, {
      header: headers, // 使用新的表头顺序
    });
    const range = XLSX.utils.decode_range(ws['!ref']);
    if (timeConversion) {
      // 将时间戳列转换为日期字符串
      ws['!cols'] = cols;
      // 将时间戳列转换成日期格式
      for (let i = 1; i <= range.e.r; i++) {
      // const cell = 'D' + i;
        const cell = XLSX.utils.encode_cell({ r: i, c: timecel }); // 时间戳所在的列
        ws[cell].t = 's';
        ws[cell].v = formatDate(ws[cell].v * 1);
      // ws[cell].v = XLSX.SSF.format('yyyy-mm-dd hh:mm:ss', new Date(ws[cell].v));
      }
    }
    console.log('导出表格', ws)
    // 创建一个工作簿
    const wb = XLSX.utils.book_new();
    // 将工作表添加到工作簿中
    XLSX.utils.book_append_sheet(wb, ws, "Sheet1");
    // 将工作簿转换成二进制数据
    const wbData = XLSX.write(wb, { bookType: "xlsx", type: "array" });
    // 创建一个 Blob 对象
    const blob = new Blob([wbData], { type: "application/octet-stream" });
    // 下载文件
    saveAs(blob, fileName + ".xlsx");
    setTimeout(hide, 2500);
  }
 const  formatDate = (value, str) => {
    let date = new Date(value);
    if (str) {
      date = moment(date).format("YYYY年MM月DD日 HH:mm:ss");
    } else {
      date = moment(date).format("YYYY-MM-DD HH:mm:ss");
    }
    return date;
  }
</script>