export function import_excel_to_json(file){
let jsonData = {}
let reader = new FileReader()
reader.readAsArrayBuffer(file)
reader.onload = function () {
let buffer = reader.result
let bytes = new Uint8Array(buffer)
let length = bytes.byteLength
let binary = ''
for (let i = 0; i < length; i++) {
binary += String.fromCharCode(bytes[i])
let XLSX = require('xlsx')
let wb = XLSX.read(binary, {
type: 'binary'
wb.SheetNames.map(item=>{
jsonData[item] = XLSX.utils.sheet_to_json(wb.Sheets[item])
jsonData[item].shift()
return jsonData
在外部调用该函数：
let data = this.import_excel_to_json(File)
data获取不到返回值
用Promise进行处理
export function import_excel_to_json(file){
return new Promise(function (resolve, reject) {
let jsonData = {}
let reader = new FileReader()
reader.readAsArrayBuffer(file)
reader.onload = function () {
let buffer = reader.result
let bytes = new Uint8Array(buffer)
let length = bytes.byteLength
let binary = ''
for (let i = 0; i < length; i++) {
binary += String.fromCharCode(bytes[i])
let XLSX = require('xlsx')
let wb = XLSX.read(binary, {
type: 'binary'
wb.SheetNames.map(item=>{
jsonData[item] = XLSX.utils.sheet_to_json(wb.Sheets[item])
jsonData[item].shift()
resolve(jsonData);
