下载数据为xlsx

1. 安装

   npm install xlsx

2. 在src下创建文件utils文件夹，在utils文件夹下创建XLSX.js文件

   // 下载excel功能
   import * as XLSX from 'xlsx'
   
   /**
    * @param dataList 表格数据内容  array
    * @param fileName 文件标题。必须以 .xlsx结尾
    */
   export const downloadXlsx = (dataList, fileName) => {
       const stringToBuff = str => {
           let buf = new ArrayBuffer(str.length)
           let view = new Uint8Array(buf)
           for (let i = 0; i !== str.length; ++i) {
               view[i] = str.charCodeAt(i) & 0xff
           }
           return buf
       };
       // 创建表格
       let workbook = XLSX.utils.book_new();
       let worksheet = XLSX.utils.aoa_to_sheet(dataList);
       XLSX.utils.book_append_sheet(workbook, worksheet, 'sheet1');
   
       // 创建二进制对象写入转换好的字节流
       let xlsxBlob = new Blob(
           [
               stringToBuff(
                   XLSX.write(workbook, {
                       bookType: 'xlsx',
                       bookSST: false,
                       type: 'binary'
                   })
               )
           ],
           { type: '' }
       );
   
       const a = document.createElement('a');
       // 利用URL.createObjectURL()方法为a元素生成blob URL
       a.href = URL.createObjectURL(xlsxBlob) ;// 创建对象超链接
       a.download = fileName
       a.click()
   }
   

3. 使用

   import { downloadXlsx } from "@/utils/XLSX";
   exportExcel() {
         const data = [
           { name: "zhangsan", age: "12" },
           { name: "wangwu", age: "14" },
         ];
         let datalist = []; //导出表格表头
         datalist.push(["姓名", "年龄"]);
         data.forEach((item) => {
           datalist.push([item.name, item.age]);
         });
         //导出插件使用
         downloadXlsx(datalist, "人员.xlsx");
     }

4.效果