function saveAs(obj, fileName) {//当然可以自定义简单的下载文件实现方式        var tmpa = document.createElement("a");        tmpa.download = fileName || "下载";        tmpa.href = URL.createObjectURL(obj); //绑定a标签        tmpa.click(); //模拟点击实现下载        setTimeout(function () { //延时释放            URL.revokeObjectURL(obj); //用URL.revokeObjectURL()来释放这个object URL        }, 100);    }    const wopts = { bookType: 'xlsx', bookSST: false, type: 'binary' };//这里的数据是用来定义导出的格式类型    // const wopts = { bookType: 'csv', bookSST: false, type: 'binary' };//ods格式    // const wopts = { bookType: 'ods', bookSST: false, type: 'binary' };//ods格式    // const wopts = { bookType: 'xlsb', bookSST: false, type: 'binary' };//xlsb格式    // const wopts = { bookType: 'fods', bookSST: false, type: 'binary' };//fods格式    // const wopts = { bookType: 'biff2', bookSST: false, type: 'binary' };//xls格式    function downloadExl(data, name) {        const wb = { SheetNames: ['Sheet1'], Sheets: {}, Props: {} };        wb.Sheets['Sheet1'] = XLSX.utils.json_to_sheet(data);//通过json_to_sheet转成单页(Sheet)数据        saveAs(new Blob([s2ab(XLSX.write(wb, wopts))], { type: "application/octet-stream" }), name + '.' + (wopts.bookType=="biff2"?"xls":wopts.bookType));    }    function s2ab(s) {        if (typeof ArrayBuffer !== 'undefined') {            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;        } else {            var buf = new Array(s.length);            for (var i = 0; i != s.length; ++i) buf[i] = s.charCodeAt(i) & 0xFF;            return buf;        }    }    function downloadXLSById(idName,fileName){        var title = new Array();        $(`#${idName} table thead tr th`).each(function(i,v){            title.push(v.textContent);        });        var jsonData = [];        $("#"+idName+" table tbody tr").each(function(i,v){            var data = {};            v.childNodes.forEach(function(value,index){                data[title[index]] = $.trim(value.textContent);            });            jsonData.push(data);        });        downloadExl(jsonData,fileName);    }

调用方式

downloadXLSById(idName,fileName);

idName : table 的上级div的 id值

fileName : 保存的文件名称