js导出excel - 掘金

<!DOCTYPE html>
<html>
<head>
	<title></title>
</head>
<body>
	<div class="container">
        <table id="backViewTable" class="table table-hover table-sm table2excel">
            <tr>
                <td>#</td>
                <td>ID</td>
                <td>姓名</td>
                <td>座位号</td>
                <td>操作</td>
            </tr>
            <tr>
                <th scope="row">1</th>
                <td>1234</td>
                <td>李文斐</td>
                <td>2楼 3排 34号 </td>
                <td><input class="btn-primary" type="button" value="删除"/></td>
            </tr>
            <tr>
                <th scope="row">2</th>
                <td>2345</td>
                <td>lwf</td>
                <td>1楼 3排 34号</td>
                <td><input class="btn-primary" type="button" value="删除"/></td>
            </tr>
            <tr>
                <th scope="row">3</th>
                <td>3456</td>
                <td>Lee</td>
                <td>1楼 3排 12号</td>
                <td><input class="btn-primary" type="button" value="删除"/></td>
            </tr>
        </table>
        <button class="btn btn-primary btn-sm" onclick="tablesToExcel(['backViewTable'], ['ProductDay1'], 'TestBook.xls', 'Excel')">Export to Excel</button>
    </div>
    <script>
    var tablesToExcel = (function() {
        var uri = 'data:application/vnd.ms-excel;base64,'
            , tmplWorkbookXML = '<?xml version="1.0"?><?mso-application progid="Excel.Sheet"?><Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet">'
            + '<DocumentProperties xmlns="urn:schemas-microsoft-com:office:office"><Author>Axel Richter</Author><Created>{created}</Created></DocumentProperties>'
            + '<Styles>'
            + '<Style ss:ID="Currency"><NumberFormat ss:Format="Currency"></NumberFormat></Style>'
            + '<Style ss:ID="Date"><NumberFormat ss:Format="Medium Date"></NumberFormat></Style>'
            + '</Styles>'
            + '{worksheets}</Workbook>'
            , tmplWorksheetXML = '<Worksheet ss:Name="{nameWS}"><Table>{rows}</Table></Worksheet>'
            , tmplCellXML = '<Cell{attributeStyleID}{attributeFormula}><Data ss:Type="{nameType}">{data}</Data></Cell>'
            , base64 = function(s) { return window.btoa(unescape(encodeURIComponent(s))) }
            , format = function(s, c) { return s.replace(/{(\w+)}/g, function(m, p) { return c[p]; }) }
        return function(tables, wsnames, wbname, appname) {
            var ctx = "";
            var workbookXML = "";
            var worksheetsXML = "";
            var rowsXML = "";

            for (var i = 0; i < tables.length; i++) {
                if (!tables[i].nodeType) tables[i] = document.getElementById(tables[i]);

//              控制要导出的行数
                for (var j = 0; j < tables[i].rows.length; j++) {
                    rowsXML += '<Row>';

//                    控制导出的列数（在本例中，最后一列为button,导出的文件会出错，所以导出到倒数第二列
                    for (var k = 0; k < tables[i].rows[j].cells.length-1; k++) {
                        var dataType = tables[i].rows[j].cells[k].getAttribute("data-type");
                        var dataStyle = tables[i].rows[j].cells[k].getAttribute("data-style");
                        var dataValue = tables[i].rows[j].cells[k].getAttribute("data-value");
                        dataValue = (dataValue)?dataValue:tables[i].rows[j].cells[k].innerHTML;
                        var dataFormula = tables[i].rows[j].cells[k].getAttribute("data-formula");
                        dataFormula = (dataFormula)?dataFormula:(appname=='Calc' && dataType=='DateTime')?dataValue:null;
                        ctx = {  attributeStyleID: (dataStyle=='Currency' || dataStyle=='Date')?' ss:StyleID="'+dataStyle+'"':''
                            , nameType: (dataType=='Number' || dataType=='DateTime' || dataType=='Boolean' || dataType=='Error')?dataType:'String'
                            , data: (dataFormula)?'':dataValue
                            , attributeFormula: (dataFormula)?' ss:Formula="'+dataFormula+'"':''
                        };
                        rowsXML += format(tmplCellXML, ctx);
                    }
                    rowsXML += '</Row>'
                }
                ctx = {rows: rowsXML, nameWS: wsnames[i] || 'Sheet' + i};
                worksheetsXML += format(tmplWorksheetXML, ctx);
                rowsXML = "";
            }

            ctx = {created: (new Date()).getTime(), worksheets: worksheetsXML};
            workbookXML = format(tmplWorkbookXML, ctx);

//          查看后台的打印输出
            console.log(workbookXML);

            var link = document.createElement("A");
            link.href = uri + base64(workbookXML);
            link.download = wbname || 'Workbook.xls';
            link.target = '_blank';
            document.body.appendChild(link);
            link.click();
            document.body.removeChild(link);
        }
    })();
    </script>

</body>
</html>