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ExcelSpirit.js
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ExcelSpirit.js
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/**************************************
-- 功能：Excel导入导出
-- 作者：BLUE
-- 时间：2017年9月20日
-- 版本：1.0.3
**************************************/
const XLSX = require('xlsx')
let _ExcelSpirit = class _ExcelSpirit {
//检测浏览器
static _checkBrowser() {
//获取浏览器代理数据信息
let ua = window.navigator.userAgent;
if (ua.indexOf("MSIE") >= 0) {
return 'ie';
}
else if (ua.indexOf("Firefox") >= 0) {
return 'Firefox';
}
else if (ua.indexOf("Chrome") >= 0) {
return 'Chrome';
}
else if (ua.indexOf("Opera") >= 0) {
return 'Opera';
}
else if (ua.indexOf("Safari") >= 0) {
return 'Safari';
}
}
/// <summary>
/// 序列化解码之后编码成base-64编码的的ASCII字符串
/// </summary>
/// <param name="s">预编码字符串</param>
/// <returns>base-64编码的的ASCII字符串</returns>
static getbase64(s) {
//解码转义序列、进行特殊字符16进制转义
return window.btoa(unescape(encodeURIComponent(s)))
}
/// <summary>
/// 序列化解码之后编码成base-64编码的的ASCII字符串
/// </summary>
/// <param name="template">模板字符串</param>
/// <param name="dataobj">模板数据对象</param>
/// <returns>模板被数据替换之后的字符串</returns>
static format(template, dataobj) {
return template.replace(/{(\w+)}/g, (value, key) => { return dataobj[key]; });
}
/// <summary>
/// 非IE浏览器导出，不确定IE是否OK，IE应该还是要调ActiveXObject
/// </summary>
/// <param name="tbid">table标签的id</param>
/// <param name="sheetname">excel左下角的sheet名称</param>
/// <returns>null</returns>
static _exportExcel(tbid, sheetname) {
//让浏览器调用excel，以流的方式将传入的base64数据写入excel
let uri = 'data:application/vnd.ms-excel;base64,',
//定义模板，以xmlns定义单独命名空间，为编译base64编码做准备
template = `<html
xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:x="urn:schemas-microsoft-com:office:excel"
<head>
<!--[if gte mso 9]>
<xml>
<x:ExcelWorkbook>
<x:ExcelWorksheets>
<x:ExcelWorksheet>
<x:Name>{sheetname}</x:Name>
<x:WorksheetOptions>
<x:DisplayGridlines/>
</x:WorksheetOptions>
</x:ExcelWorksheet>
</x:ExcelWorksheets>
</x:ExcelWorkbook>
</xml>
<![endif]-->
<meta charset="UTF-8">
</head>
<body>
<table>{tbexcel}</table>
</body>
</html>`;
//获取DOM对象
if (!tbid.nodeType)
tbid = document.getElementById(tbid);
if (!tbid.nodeType) {
throw new Error("The DOM node is not found");
return false;
} else {
//定义要往模板中替换的数据对象
let ctx = { sheetname, tbexcel: tbid.innerHTML };
//将编译的base-64 URI植入地址栏，让浏览器自动执行写入流
window.location.href = uri + this.getbase64(this.format(template, ctx))
}
}
//为IE准备的，选择保存路径
static _browseFolder(path) {
try {
var Message = "\u8bf7\u9009\u62e9\u6587\u4ef6\u5939"; //选择框提示信息
var Shell = new ActiveXObject("Shell.Application");
var Folder = Shell.BrowseForFolder(0, Message, 64, 17); //起始目录为：我的电脑
//var Folder = Shell.BrowseForFolder(0, Message, 0); //起始目录为：桌面
if (Folder != null) {
Folder = Folder.items(); // 返回 FolderItems 对象
Folder = Folder.item(); // 返回 Folderitem 对象
Folder = Folder.Path; // 返回路径
if (Folder.charAt(Folder.length - 1) != "\\") {
Folder = Folder + "\\";
}
document.getElementById(path).value = Folder;
return Folder;
}
}
catch (e) {
alert(e.message);
}
}
/// <summary>
/// IE利用ActiveXObject调用Excel，很奇怪，跟其他浏览器不一样，
/// 样式不生效，合并单元格还有问题
/// </summary>
/// <param name="tbid">table标签的id</param>
/// <param name="sheetname">excel左下角的sheet名称</param>
/// <returns>null</returns>
static _exportExcel4IE(tbid) {
//使用微软自己的ActiveX调用excel程序
let curTb = document.getElementById(tbid),
excelApp = new ActiveXObject("Excel.Application"),
xlBook = excelApp.Workbooks.Add(), //新增工作簿
ExcelSheet = xlBook.ActiveSheet, //获取工作sheet
lenRow = curTb.rows.length; //html行数
if (!curTb) {
throw new Error("The DOM node is not found");
return false;
} else {
for (i = 0; i < lenRow; i++) {
let lenCell = curTb.rows(i).cells.length;
for (j = 0; j < lenCell; j++) {
ExcelSheet.Cells(i + 1, j + 1).value = curTb.rows(i).cells(j).innerText;
}
}
excelApp.Visible = true;
ExcelSheet.SaveAs("E:\\sheet.xls");//保存路径先写死
}
}
/// <summary>
/// ExcelSpirit.html2excel(tbid)
/// 公共调用将html表格里面的数据导出到excel，
/// </summary>
/// <param name="tbid">table标签的id</param>
/// <returns>null</returns>
static html2excel(tbid, name = "Worksheet") {
let _bowerType = this._checkBrowser();
if (_bowerType === 'ie') {
this._exportExcel4IE(tbid);
} else {
this._exportExcel(tbid, name)
}
}
//----------------------以下是将JSON数据导出到EXCEL，基于js-xlsx--------------------------------
/// <summary>
/// 获取对应数字的字母，重叠字母
/// </summary>
/// <param name="n">数字</param>
/// <returns>单个大写字母或者重叠大写字母</returns>
static _getdblColater(n) {
let s = '', m = 0;
while (n > 0) {
m = n % 26 + 1
s = String.fromCharCode(m + 64) + s
n = (n - m) / 26
}
return s
}
/// <summary>
/// 生产预备数据[{v:"1111"},{v:"222"}]
/// </summary>
/// <param name="json">json数据[{},{},{}]</param>
/// <param name="keyArr">键数组</param>
/// <returns>[]</returns>
static _dft(json, keyArr) {
//数据工厂
let tmpdata = [],
r = json.map((dataobj, jsonindex) => keyArr.map((value, index) => Object.assign({}, {
v: dataobj[value],
position: (index > 25 ? this._getdblColater(index) : String.fromCharCode(65 + index)) + (jsonindex + 1)
//通过Code号获取字母
})))
//将二维数组合并为一维数组[{position:"A1",v:"1111"},{position:"A2",v:"222"}]，
//生产参数数据[{v:"1111"},{v:"222"}]
r.reduce((prev, curr) => prev.concat(curr)).forEach(value => tmpdata[value.position] = {
v: value.v
});
return tmpdata;
}
/// <summary>
/// 字符串转字符流
/// </summary>
/// <param name="s">预转换字符串</param>
/// <returns>buffer</returns>
static _s2ab(s) {
let buf = new ArrayBuffer(s.length),
view = new Uint8Array(buf);
for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
return buf;
}
/// <summary>
/// ExcelSpirit.json2excel(json,titlemap)
/// 公共调用将json表格里面的数据导出到excel，
/// </summary>
/// <param name="json">json数据[{},{},{}]</param>
/// <param name="json">titlemap字段与明文映射关系{}</param>
/// <returns>null</returns>
static json2excel(json, titlemap1, filename = "下载") {
if (json.length > 0) {
let titlemap = titlemap1 || json[0];
//在json头部插入一个对象，用于存储表头
json.unshift({});
let keyArr = [];//存储key
for (let k in titlemap) {
keyArr.push(k);
if (titlemap1) {
json[0][k] = titlemap1[k];
} else {
json[0][k] = k;
}
}
//获取数据工厂产生的数据
let tmpdata = this._dft(json, keyArr),
//设置Excel单元格区域
outputPos = Object.keys(tmpdata),
tmpWB = {
SheetNames: ['mySheet'], // 保存的表标题
Sheets: {
'mySheet': Object.assign({},
tmpdata, // 内容
{
'!ref': outputPos[0] + ':' + outputPos[outputPos.length - 1] // 设置填充区域
})
}
},
tmpDown = new Blob([this._s2ab(XLSX.write(tmpWB,
{ bookType: 'xlsx', bookSST: false, type: 'binary' } // 这里的数据是用来定义导出的格式类型
))], {
type: ''
}), // 创建二进制对象写入转换好的字节流
href = URL.createObjectURL(tmpDown); // 创建对象超链接
//创建虚拟a标签实现下载
var a = document.createElement("a");
a.download = filename + '.xlsx' // 下载名称
a.href = href // 绑定a标签
a.click() // 模拟点击实现下载
setTimeout(function () { // 延时释放
URL.revokeObjectURL(tmpDown) // 用URL.revokeObjectURL()来释放这个object URL
a = null;
}, 100)
} else {
throw new Error("Please pass in the json object");
}
}
//----------------------导入Excel到返回JSON，基于js-xlsx--------------------------------
/// <summary>
/// ExcelSpirit.json2excel(json,titlemap)
/// 基于一般事件的上传
/// </summary>
/// <param name="e">事件对象</param>
/// <param name="callback(json)">回调函数</param>
/// <param name="binary" default="true">是否以二进制的形式读取文件</param>
/// <returns>null</returns>
static excel2json4ev(callback, binary = false, type) {
var input = document.createElement('input'); //创建虚拟file
var inputid = "file_" + Math.ceil(Math.random() * 100); //创建随机ID
var body_element = document.getElementsByTagName("body")[0];
input.setAttribute('type', 'file');
input.setAttribute('id', inputid);
input.setAttribute('multiple', "multiple");
input.style.display = "none";
input.setAttribute("onchange", "ExcelSpirit.importExcel(this," + callback + "," + binary + ",\"" + type + "\")");
body_element.appendChild(input);
var fileElem = document.getElementById(inputid);
if (fileElem) {
//触发file伪事件
fileElem.click();
//fileElem = null;
}
//进行事件伪触发
/* var evnodeid = e.target.attributes.id.value;
if (evnodeid) {
var fileElem = document.getElementById(inputid);
if (fileElem) {
//触发file伪事件
fileElem.click();
fileElem = null;
}
} else {
throw new Error("Please add an id for the event object!!!");
} */
}
static excel2json4drop(target, callback, binary = false, type) {
let _self = this;
document.ondragover = function (e) {
e.preventDefault(); //阻止浏览器默认的拖拽解析行为
return false;
};
document.ondrop = function (e) {
e.preventDefault();
return false; //阻止 document.ondrop的默认行为
};
var container = document.getElementById(target);
container.ondragover = function (e) {
e.preventDefault();
return false;
};
container.ondrop = function (e) {
var filelist = e.dataTransfer.files;
_self._doimport(filelist, callback, false, type);
};
}
//文件流转BinaryString
static fixdata(data) {
var o = "",
l = 0,
w = 10240;
for (; l < data.byteLength / w; ++l) o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w, l * w + w)));
o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w)));
return o;
}
/// <summary>
/// ExcelSpirit.json2excel(json,titlemap)
/// 解析Excel
/// </summary>
/// <param name="ev">file事件对象</param>
/// <param name="callback(json)">回调函数</param>
/// <param name="binary" default="true">是否以二进制的形式读取文件</param>
/// <returns>null</returns>
static importExcel(ev, callback, binary, type) {
if (!ev.files) {
return;
}
var filelist = ev.files;
ev.parentNode.removeChild(ev);
this._doimport(filelist, callback, binary, type);
}
static _doimport(fileList, callback, binary, type) {
let _self = this,
JSON2lat = [];
(function dofileList(index) {
if (index === fileList.length) {
if (callback) {
callback(JSON.stringify(JSON2lat));
return;
} else {
JSON2lat = null;
}
}
let wb;
var f = fileList[index];
if (f.name.endsWith(".xls") || f.name.endsWith(".xlsx")) {
var reader = new FileReader();
reader.readAsBinaryString(f);
reader.onload = function (e) {
var data = e.target.result;
if (binary) {
wb = XLSX.read(btoa(_self.fixdata(data)), {
type: 'base64'
});
} else {
wb = XLSX.read(data, {
type: 'binary'
});
}
if (type === "obj") {
let r = _self._read4excel2obj(wb);
callback && callback(r);
return;
}
let sheetLength = Object.keys(wb.Sheets).length,
json = [];
(function getjson(n) {
if (n == sheetLength) {
if (fileList.length === 1) {
//如果一个文件则返回一维数组
if (callback) {
callback(json);
return;
} else {
json = null;
}
} else {
//如果多个文件则返回二维数组，一个数组包含一个文件的数据JSON
JSON2lat.push(json);
dofileList(++index);
}
} else {
let currJSON = JSON.stringify(XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[n]]));
if (currJSON.length > 2) {
currJSON = JSON.parse(currJSON);
json = json.concat(currJSON);
}
getjson(++n);
}
})(0)
//下面那种方式可能由于sheet过多，由于异步问题造成返回json不完全
/* for (let i = 0; i < sheetLength; i++) {
var currJSON = JSON.stringify(XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[i]]));
if (currJSON.length > 2) {
json = json.concat(currJSON);
}
}
if (callback) {
callback(json);
} */
}
} else {
throw new Error("文件格式错误！请选择后缀为.xls或.xlsx的Excel文件！");
}
})(0)
}
static _read4excel2obj(wb) {
let result = {};
wb.SheetNames.forEach(function (sheetName) {
var roa = XLSX.utils.sheet_to_json(wb.Sheets[sheetName], { header: 1 });
if (roa.length) result[sheetName] = roa;
});
for (let key in result) {
let a = JSON.parse(JSON.stringify(result[key]));
result[key].splice(0, result[key].length);
for (let i = 0, len = a.length; i < len; i++) {
if (a[i].length !== 0) {
result[key].push(a[i])
}
}
a = null;
}
return JSON.parse(JSON.stringify(result));
}
}
//保护类中的私有方法
class ExcelSpirit {
static html2excel(tbid, name = "Worksheet") {
_ExcelSpirit.html2excel(tbid, name);
}
static json2excel(json, titlemap1, filename = "下载") {
_ExcelSpirit.json2excel(json, titlemap1, filename);
}
static excel2json4ev(callback, binary = false) {
_ExcelSpirit.excel2json4ev(callback, binary);
}
static excel2obj4ev(callback, binary = false) {
_ExcelSpirit.excel2json4ev(callback, binary, "obj");
}
static excel2json4drop(target, callback, binary = false) {
_ExcelSpirit.excel2json4drop(target, callback, binary);
}
static excel2obj4drop(target, callback, binary = false) {
_ExcelSpirit.excel2json4drop(target, callback, binary, "obj");
}
static importExcel(ev, callback, binary, type) {
_ExcelSpirit.importExcel(ev, callback, binary, type);
}
}
//以三种方式暴露此类
window.ExcelSpirit = ExcelSpirit; //script引用
module.exports = ExcelSpirit; //commonjs规范
export default ExcelSpirit; //ES6暴露