1.安裝file-saver

2.安裝xlsx

使用：

let th=['名稱','地址','電話','年齡']

let data=[['小明','上海市','123456',20],['小明','上海市','123456',20],]

let fileName, sheetName1, fileType = 'xlsx'

fileName = '檔名稱'

sheetName1= 'sheet表1名稱'

toExcel({th, data, fileName, fileType, sheetName})

建立jsonexcel.js檔案

import {saveAs} from 'file-saver'
import XLSX from 'xlsx/dist/xlsx.full.min'

// 將json資料處理為xlsx需要的格式
function datenum(v, date1904) {
  if (date1904) v += 1462
  let epoch = Date.parse(v)
  return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000)
}

function data2ws(data) {
  const ws = {}
  const range = {s: {c: 10000000, r: 10000000}, e: {c: 0, r: 0}}
  for (let R = 0; R != data.length; ++R) {
    for (let C = 0; C != data[R].length; ++C) {
      if (range.s.r > R) range.s.r = R
      if (range.s.c > C) range.s.c = C
      if (range.e.r < R) range.e.r = R
      if (range.e.c < C) range.e.c = C
      const cell = {v: data[R][C]}
      if (cell.v == null) continue
      const cell_ref = XLSX.utils.encode_cell({c: C, r: R})

      if (typeof cell.v === 'number') cell.t = 'n'
      else if (typeof cell.v === 'boolean') cell.t = 'b'
      else if (cell.v instanceof Date) {
        cell.t = 'n'
        cell.z = XLSX.SSF._table[14]
        cell.v = datenum(cell.v)
      }
      else cell.t = 's'

      ws[cell_ref] = cell
    }
  }
  if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range)
  return ws
}

// 匯出Excel
function Workbook() {
  if (!(this instanceof Workbook)) return new Workbook()
  this.SheetNames = []
  this.Sheets = {}
}

function s2ab(s) {
  const buf = new ArrayBuffer(s.length)
  const view = new Uint8Array(buf)
  for (let i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF
  return buf
}

/*
* th => 表頭
* data => 資料
* fileName => 檔名
* fileType => 檔案型別
* sheetName => sheet頁名
*/
export default function toExcel({th, data, fileName, fileType, sheetName}) {
  const wb = new Workbook()
  if(Array.isArray(sheetName)){
    const ws=[]
    data.forEach((iten,i)=>{
      th[i].forEach(itenTh=>{
        iten.unshift(itenTh)
      })
      ws.push(data2ws(iten))
    })
    sheetName.forEach((iten,j)=>{
      wb.SheetNames.push(iten)
      wb.Sheets[iten] = ws[j]
    })
  }else{
    data.unshift(th)
    const ws = data2ws(data)
    sheetName = sheetName || 'sheet1'
    wb.SheetNames.push(sheetName)
    wb.Sheets[sheetName] = ws
  }
  fileType = fileType || 'xlsx'
  var wbout = XLSX.write(wb, {bookType: fileType, bookSST: false, type: 'binary'})
  fileName = fileName || '列表'
  saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), `${fileName}.${fileType}`)
}