cnpm install x2js --save

// 引入模块

import x2js from 'x2js'

<template>

    <el-button type="primary" @click="exportExcel">导出</el-button>

</template>

<script lang="ts">

import { defineComponent, ref  } from 'vue'

import { ElMessage } from 'element-plus'

export default defineComponent({

     data() {

         return {

            testdata: [

            {

              "noticeId":345646,

              "satName":"ZOHREH-2",

              "country":"IRN",

              "freqMin":456.0,

              "freqMax":456.0,

              "beamInfoList":

                  [

                    {

                      "beamName":"RS49",

                      "freqMin":3456.0,

                      "freqMax":654.0,

                      "groupInfoList":

                          [

                            {

                              "groupId":567.34,

                              "freqMin":768.0,

                              "freqMax":678.0,

                              "pwrMax":1.0

                            },

                            {

                              "groupId":10600362,

                              "freqMin":11450.0,

                              "freqMax":11700.0,

                              "pwrMax":2.0

                            },

                            {

                              "groupId":10600363,

                              "freqMin":14000.0,

                              "freqMax":14500.0,

                              "pwrMax":3.0

                            }

                          ]

                    },

                 ]

            }]

         }

     },

    methods: {

exportExcel() {
let x2js = new X2js();
let groupdata = { doc: this.testdata };
//groupdata必须只有一个跟节点noticeData不然导出xml时会报错
// let obj = {
// doc: groupdata,
// };
// 调用x2js 将我们的json数据转换成xml数据格式
console.log(x2js);
let xml = x2js.js2xml(groupdata);
xml = `<?xml version="1.0" ?>` + xml;
console.log(xml);
// 下面就是我们想要的xml文件的数据格式了
// 这里会生成一个url
let url = window.URL.createObjectURL(
new Blob([xml], { type: "text/xml;charset=utf-8" })
);

// 然后就可以创建a标签 最后下载下来了
let link = document.createElement("a");
// 不显示链接
link.style.display = "none";
link.href = url;
// 设置链接属性
link.setAttribute("download", "导出");
//点击链接
document.body.appendChild(link);
link.click();
// 删除连接
document.body.removeChild(link);
},

})