js-xlsx操作excel表格
1导入与导出功能实现
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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <input type="button" value="导入" onclick="file_in()"><br><br> <input type="button" value="导出" onclick="file_out()"> <!--导入文件使用控件--> <input type="file" id="excel_in" style="display:none;" /> <!-- 导出文件使用控件,标签不需要内容 --> <a href="javascript" id="excel_out" download="这里是下载的文件名.xlsx" style="display:none;"></a> <script type="text/javascript" src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <script src="http://oss.sheetjs.com/js-xlsx/xlsx.full.min.js"></script> <script type="text/javascript" src="xlsxhelper.js"></script> <script type="text/javascript"> //导入excel function file_in() { $('#excel_in').click(); } $('#excel_in').change(function (e) { xlsx.importf(this, getexceldata); }) function getexceldata(info) { console.log(info); } var jsono = [{ //测试数据 "保质期临期预警(天)": "adventLifecycle", "商品标题": "title", "建议零售价": "defaultPrice" }, { //测试数据 "保质期临期预警(天)": "adventLifecycle2", "商品标题": "title2", "建议零售价": "defaultPrice2" }]; //导出excel function file_out() { $('#excel_out').attr('download', 'download.xls'); xlsx.downloadExl(jsono, $('#excel_out')[0]); }; </script> </body> </html>
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;(function () { window.xlsx = window.xlsx || { /*para*/ /*end para*/ /*function*/ //excel内容读取(只读取第一个sheet) /* FileReader共有4种读取方法: * 1.readAsArrayBuffer(file):将文件读取为ArrayBuffer。 * 2.readAsBinaryString(file):将文件读取为二进制字符串 * 3.readAsDataURL(file):将文件读取为Data URL * 4.readAsText(file, [encoding]):将文件读取为文本,encoding缺省值为'UTF-8' */ importf: function (obj, callback) {//导入 if (!obj.files) { callback(''); return; } var f = obj.files[0]; var reg = /^.*\.(?:xls|xlsx)$/i;//文件名可以带空格 if (!reg.test(f.name)) {//校验不通过 alert("请上传excel格式的文件!"); callback(''); return; } var wb;//读取完成的数据 var rABS = false; //是否将文件读取为二进制字符串 var reader = new FileReader(); reader.onload = function (e) { var data = e.target.result; if (rABS) { wb = XLSX.read(btoa(xlsx.fixdata(data)), {//手动转化 type: 'base64' }); } else { wb = XLSX.read(data, {type: 'binary'}); } //wb.SheetNames[0]是获取Sheets中第一个Sheet的名字 //wb.Sheets[Sheet名]获取第一个Sheet的数据 //document.getElementById("demo").innerHTML = JSON.stringify(XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]])); var dom = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]); callback(dom); return; }; if (rABS) { reader.readAsArrayBuffer(f); } else { reader.readAsBinaryString(f); } }, fixdata: function (data) { //文件流转BinaryString 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; }, downloadExl: function (json, targetdom, type) { var tmpDown; //导出的二进制对象 var tmpdata = json[0]; json.unshift({}); var keyMap = []; //获取keys //keyMap =Object.keys(json[0]); for (var k in tmpdata) { keyMap.push(k); json[0][k] = k; } var tmpdata = [];//用来保存转换好的json json.map((v, i) => keyMap.map((k, j) => Object.assign({}, { v: v[k], position: (j > 25 ? xlsx.getCharCol(j) : String.fromCharCode(65 + j)) + (i + 1) }))).reduce((prev, next) => prev.concat(next)).forEach((v, i) => tmpdata[v.position] = { v: v.v }); var outputPos = Object.keys(tmpdata); //设置区域,比如表格从A1到D10 var 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([xlsx.s2ab(XLSX.write(tmpWB, {bookType: (type == undefined ? 'xlsx' : type), 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 var href = URL.createObjectURL(tmpDown); //创建对象超链接 //document.getElementById("hf").href = href; //绑定a标签 //document.getElementById("hf").click(); //模拟点击实现下载 targetdom.href = href; targetdom.click(); setTimeout(function () { //延时释放 URL.revokeObjectURL(tmpDown); //用URL.revokeObjectURL()来释放这个object URL }, 100); }, s2ab: function (s) { //字符串转字符流 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; }, // 将指定的自然数转换为26进制表示。映射关系:[0-25] -> [A-Z]。 getCharCol: function (n) { var temCol = ''; var s = ''; var m = 0; while (n > 0) { m = n % 26 + 1; s = String.fromCharCode(m + 64) + s; n = (n - m) / 26; } return s; }, //生成新的GUID getHtml: function () { //alert($('.breadcrumbs').html()); } /*end function*/ } })();