纯前端生成和解析 Excel。
SheetJS js-xlsx 方案
数据是以行进行组织的，需要定义每一行的数据，支持列的合并等复杂较需求。
import XLSX from 'xlsx';
// csv转sheet对象
function csv2sheet(csv) {
var sheet = {}; // 将要生成的sheet
csv = csv.split('\n');
csv.forEach(function (row, i) {
row = row.split(',');
if (i == 0) sheet['!ref'] = 'A1:' + String.fromCharCode(65 + row.length - 1) + (csv.length - 1);
row.forEach(function (col, j) {
sheet[String.fromCharCode(65 + j) + (i + 1)] = { v: col };
});
});
return sheet;
}
// 将一个sheet转成最终的excel文件的blob对象，然后利用URL.createObjectURL下载
function sheet2blob(sheet, sheetName) {
sheetName = sheetName || 'sheet1';
var workbook = {
SheetNames: [sheetName],
Sheets: {},
};
workbook.Sheets[sheetName] = sheet;
// 生成excel的配置项
var wopts = {
bookType: 'xlsx', // 要生成的文件类型
bookSST: false, // 是否生成Shared String Table，官方解释是，如果开启生成速度会下降，但在低版本IOS设备上有更好的兼容性
type: 'binary',
};
var wbout = XLSX.write(workbook, wopts);
var blob = new Blob([s2ab(wbout)], { type: 'application/octet-stream' });
// 字符串转ArrayBuffer
function s2ab(s) {
var buf = new ArrayBuffer(s.length);
var view = new Uint8Array(buf);
for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xff;
return buf;
}
return blob;
}
/**
* 通用的打开下载对话框方法，没有测试过具体兼容性
* @param url 下载地址，也可以是一个blob对象，必选
* @param saveName 保存文件名，可选
*/
function openDownloadDialog(url, saveName) {
if (typeof url == 'object' && url instanceof Blob) {
url = URL.createObjectURL(url); // 创建blob地址
}
var aLink = document.createElement('a');
aLink.href = url;
aLink.download = saveName || ''; // HTML5新增的属性，指定保存文件名，可以不要后缀，注意，file:///模式下不会生效
var event;
if (window.MouseEvent) event = new MouseEvent('click');
else {
event = document.createEvent('MouseEvents');
event.initMouseEvent(
'click',
true,
false,
window,
0,
0,
0,
0,
0,
false,
false,
false,
false,
0,
null,
);
}
aLink.dispatchEvent(event);
}
// 传入csv，执行后就会弹出下载框
const exportExcel1 = (csv) => {
var sheet = csv2sheet(csv);
var blob = sheet2blob(sheet);
openDownloadDialog(blob, '导出.xlsx')
};
// 利用工具，简化csv2sheet的操作
const exportExcel2 = () => {
var aoa = [
['主要信息', null, null, '其它信息'], // 特别注意合并的地方后面预留2个null
['姓名', '性别', '年龄', '注册时间'],
['张三', '男', 18, new Date()],
['李四', '女', 22, new Date()]
];
var sheet = XLSX.utils.aoa_to_sheet(aoa);
sheet['!merges'] = [
// 设置A1-C1的单元格合并
{s: {r: 0, c: 0}, e: {r: 0, c: 2}}
];
openDownloadDialog(sheet2blob(sheet), '导出.xlsx');
};
// 接收自定义参数，支持较复杂excel导出
const exportExcel3 = (data, merges, cols, rows, title) => {
var sheet = XLSX.utils.aoa_to_sheet(data);
// 参考exportExcel2的 sheet['!merges']写法
sheet['!merges'] = merges || [];
sheet['!rows'] = rows;
sheet['!cols'] = cols;
openDownloadDialog(sheet2blob(sheet), `${title || '导出'}.xlsx`);
};
export { exportExcel1, exportExcel2, exportExcel3 };
exportExcel3 参考样例：
非框架生成简单 CSV
方案一
export const exportCSV = (storageObj: any) => {
const title = storageObj.title as any[];
const titleForKey = storageObj.titleForKey;
const data = storageObj.data;
const str = [];
str.push(title.join(",") + "\n");
for (let i = 0; i < data.length; i++) {
const temp = [];
for (let j = 0; j < titleForKey.length; j++) {
temp.push(data[i][titleForKey[j]]);
}
str.push(temp.join(",") + "\n");
}
const uri = 'data:text/csv;charset=utf-8,\ufeff' + encodeURIComponent(str.join(""));
const downloadLink = document.createElement("a");
downloadLink.href = uri;
downloadLink.download = new Date().toISOString().substring(0, 10) + "-template.csv";
downloadLink.click();
}
<a onClick={() => exportCSV({
title: ["title", "key", "type", "subtitle", "link", "icon", "landscape"],
titleForKey: ["title", "key", "type", "subtitle", "link", "icon", "landscape"],
data: [{
"title": '',
"key": 'The legal contents are letters、numbers and underscores！',
"type": "1 or 2，games is 2",
"subtitle": '',
"link": '',
"icon": '',
"landscape": "TRUE or FALSE"
}]
})}
>
template.csv
</a>
方案二
export const downloadCSV = (data: string) => {
const csvDataBlob = new Blob([data], { type: 'text/csv' });
const ObjectURL = URL.createObjectURL(csvDataBlob);
if (!ObjectURL) return;
const a = document.createElement('a');
a.href = ObjectURL;
a.click();
URL.revokeObjectURL(ObjectURL);
};
<a onClick={() => downloadCSV('title1,title2')}>
template.csv
</a>
FileSaver.js 方案
- FileSaver.js 介绍：FileSaver.js 是在客户端保存文件的解决方案，非常适合需要生成文件，或者保存不应该发送到外部服务器的敏感信息的 web App；
- FileSaver.js GitHub；
- FileSaver.js demo
-
保存 excel 文件示例代码：
// utils.j import FileSaver from 'file-saver'; export const exportCsv = (columns, keys, data, title = '导出') => { let exportStr = '\uFEFF'; columns = columns.join(','); exportStr += columns + '\n'; _.each(data, (item) => { let dataStr = ''; let itemStr = ''; _.each(keys, (key) => { if (typeof key === 'object') { for (let index in key) { let callback = key[index]; itemStr = callback(item[index], item); } } else { itemStr = item[key]; } dataStr += `"${itemStr || ''}",`; }); dataStr = dataStr.substring(0, dataStr.length - 1) + '\n'; exportStr += dataStr; }); let blob = new Blob([exportStr], { type: 'text/csv;charset=UTF-8', }); FileSaver.saveAs(blob, title + '.csv'); };// index.js import { exportCsv } from './utils.js'; // 导出函数 const doExport = () => { // columns配置生成excel的列（columns为antD table的columns） let keys = _.map(columns, 'dataIndex'); let column = _.map(columns, 'title'); let dataList = list.map((item) => { // 可以做一些数据处理 item.requestTime = moment .unix(item.requestTime) .format('YYYY-MM-DD HH:mm:ss'); return item; }); exportCsv(column, keys, dataList, '导出列表'); };
纯前端解析 excel 文件
HTML：
<input @change="getUploadFile" type="file" />
JS：
import XLSX from 'xlsx';
getUploadFile (e) {
//拿到所导入文件的名字
let fileName = e.target.files[0]
//定义reader，存放文件读取方法
let reader = new FileReader()
//启动函数
reader.readAsBinaryString(fileName)
//onload在文件被读取时自动触发
reader.onload = function(e) {
//workbook存放excel的所有基本信息
let workbook = XLSX.read(e.target.result, {type: 'binary'})
//定义sheetList中存放excel表格的sheet表，就是最下方的tab
let sheetList = workbook.SheetNames
//存放json数组格式的表格数据
let resultJson = []
//存放字符串数组格式的表格数据
let resultFormulae = []
sheetList.forEach(function(y) {
let worksheet = workbook.Sheets[y]
let json = XLSX.utils.sheet_to_json(workbook.Sheets[y])
let formulae = XLSX.utils.sheet_to_formulae(workbook.Sheets[y])
if(json.length > 0){
//具体如何处理看项目需求，我的项目其实只有一个sheet，在这里写成循环避免大家误会
//数据处理与存放
resultJson.push(json)
resultFormulae.push(formulae)
}
});
//因为我的表格只有一列，因此我取出resultJson第一组数据的key作为键去遍历取出手机号码
let tableHeader = Object.keys(result[0])[0]
let importInfo = result.map((item) => {
return item[tableHeader]
})
};
}
