js一键导出Excel

HTML:　　　

 1 <div class="container">
 2     <table id="backViewTable" class="table table-hover table-sm table2excel">
 3             <tr>
 4                 <td>#</td>
 5                 <td>ID</td>
 6                 <td>姓名</td>
 7                 <td>座位号</td>
 8                 <td>操作</td>
 9             </tr>
10             <tr>
11                 <th scope="row">1</th>
12                 <td>1234</td>
13                 <td>李文斐</td>
14                 <td>2楼 3排 34号 </td>
15                 <td><input class="btn-primary" type="button" value="删除"/></td>
16             </tr>
17             <tr>
18                 <th scope="row">2</th>
19                 <td>2345</td>
20                 <td>lwf</td>
21                 <td>1楼 3排 34号</td>
22                 <td><input class="btn-primary" type="button" value="删除"/></td>
23             </tr>
24             <tr>
25                 <th scope="row">3</th>
26                 <td>3456</td>
27                 <td>Lee</td>
28                 <td>1楼 3排 12号</td>
29                 <td><input class="btn-primary" type="button" value="删除"/></td>
30             </tr>
31         </table>
32         <button class="btn btn-primary btn-sm" onclick="tablesToExcel(['backViewTable'], ['ProductDay1'], 'TestBook.xls', 'Excel')">Export to Excel</button>
33     </div>

JS:　　

1 <script>
 2     var tablesToExcel = (function() {
 3         var uri = 'data:application/vnd.ms-excel;base64,'
 4             , 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">'
 5             + '<DocumentProperties xmlns="urn:schemas-microsoft-com:office:office"><Author>Axel Richter</Author><Created>{created}</Created></DocumentProperties>'
 6             + '<Styles>'
 7             + '<Style ss:ID="Currency"><NumberFormat ss:Format="Currency"></NumberFormat></Style>'
 8             + '<Style ss:ID="Date"><NumberFormat ss:Format="Medium Date"></NumberFormat></Style>'
 9             + '</Styles>'
10             + '{worksheets}</Workbook>'
11             , tmplWorksheetXML = '<Worksheet ss:Name="{nameWS}"><Table>{rows}</Table></Worksheet>'
12             , tmplCellXML = '<Cell{attributeStyleID}{attributeFormula}><Data ss:Type="{nameType}">{data}</Data></Cell>'
13             , base64 = function(s) { return window.btoa(unescape(encodeURIComponent(s))) }
14             , format = function(s, c) { return s.replace(/{(\w+)}/g, function(m, p) { return c[p]; }) }
15         return function(tables, wsnames, wbname, appname) {
16             var ctx = "";
17             var workbookXML = "";
18             var worksheetsXML = "";
19             var rowsXML = "";
20
21             for (var i = 0; i < tables.length; i++) {
22                 if (!tables[i].nodeType) tables[i] = document.getElementById(tables[i]);
23
24 //              控制要导出的行数
25                 for (var j = 0; j < tables[i].rows.length; j++) {
26                     rowsXML += '<Row>';
27
28 //                    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
29                     for (var k = 0; k < tables[i].rows[j].cells.length-1; k++) {
30                         var dataType = tables[i].rows[j].cells[k].getAttribute("data-type");
31                         var dataStyle = tables[i].rows[j].cells[k].getAttribute("data-style");
32                         var dataValue = tables[i].rows[j].cells[k].getAttribute("data-value");
33                         dataValue = (dataValue)?dataValue:tables[i].rows[j].cells[k].innerHTML;
34                         var dataFormula = tables[i].rows[j].cells[k].getAttribute("data-formula");
35                         dataFormula = (dataFormula)?dataFormula:(appname=='Calc' && dataType=='DateTime')?dataValue:null;
36                         ctx = {  attributeStyleID: (dataStyle=='Currency' || dataStyle=='Date')?' ss:StyleID="'+dataStyle+'"':''
37                             , nameType: (dataType=='Number' || dataType=='DateTime' || dataType=='Boolean' || dataType=='Error')?dataType:'String'
38                             , data: (dataFormula)?'':dataValue
39                             , attributeFormula: (dataFormula)?' ss:Formula="'+dataFormula+'"':''
40                         };
41                         rowsXML += format(tmplCellXML, ctx);
42                     }
43                     rowsXML += '</Row>'
44                 }
45                 ctx = {rows: rowsXML, nameWS: wsnames[i] || 'Sheet' + i};
46                 worksheetsXML += format(tmplWorksheetXML, ctx);
47                 rowsXML = "";
48             }
49
50             ctx = {created: (new Date()).getTime(), worksheets: worksheetsXML};
51             workbookXML = format(tmplWorkbookXML, ctx);
52
53 //          查看后台的打印输出
54             console.log(workbookXML);
55
56             var link = document.createElement("A");
57             link.href = uri + base64(workbookXML);
58             link.download = wbname || 'Workbook.xls';
59             link.target = '_blank';
60             document.body.appendChild(link);
61             link.click();
62             document.body.removeChild(link);
63         }
64     })();
65 </script>

转载自：https://blog.csdn.net/liwenfei123/article/details/78719686