使用js-xlsx库,将表格table导出为Excel表格

布满荆棘的人生 2022-02-01 12:25 815阅读 0赞

npm install xlsjs

引入xlsx.full.min.js 和export.js

<body>
    <button onclick="tableExport()">导出</button>
    <table id="tables">
        <thead>
        <tr>
            <th>姓名</th>
            <th>学号</th>
        </tr>
        </thead>
        <tbody>
        <tr>
            <td>张三</td>
            <td>123456789</td>
        </tr>
        <tr>
            <td>李四</td>
            <td>123456788</td>
        </tr>
        </tbody>
        <tr>
            <td>王五</td>
            <td>123456787</td>
        </tr>
    </table>
    <script src="../assets/js/xlsx.full.min.js"></script>
    <script src="../assets/js/export.js"></script>
    <script type="text/javascript">
        function tableExport() {
            btn_export("tables","table导出表格")
        }
        function btn_export(id,filename) {
            let table1 = document.getElementById(id);
            let sheet = XLSX.utils.table_to_sheet(table1);//将一个table对象转换成一个sheet对象
            openDownloadDialog(sheet2blob(sheet), filename+'.xlsx');
        }
    </script>
    </body>

### export.js ###

// 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';
        let workbook = {
            SheetNames: [sheetName],
            Sheets: {}
        };
        workbook.Sheets[sheetName] = sheet; // 生成excel的配置项
    
        let 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'
        };
        let wbout = XLSX.write(workbook, wopts);
        let blob = new Blob([s2ab(wbout)], {
            type: "application/octet-stream"
        }); // 字符串转ArrayBuffer
        function s2ab(s) {
            let buf = new ArrayBuffer(s.length);
            let view = new Uint8Array(buf);
            for (let i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
            return buf;
        }
        return blob;
    }
    
    function openDownloadDialog(url, saveName) {
        if (typeof url == 'object' && url instanceof Blob) {
            url = URL.createObjectURL(url); // 创建blob地址
        }
        let 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
        let 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);
    }

效果：

![20190514151516565.png][]

![20190514151531683.png][]

[20190514151516565.png]: /images/20220201/c629b80fb1af4f3aa38a03416fa0c9e8.png
[20190514151531683.png]: /images/20220201/17fbaae6e3394962922254953caf0c96.png