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【转载】JavaScript导出Excel

如果没有用到前端插件，也没有用到后台poi导出的话，用js导出也是一种方式。亲测可用。

/**
 * 导出excel
 */
var idTmr;  
function  getExplorer() {  
    var explorer = window.navigator.userAgent ;  
    //ie  
    if (explorer.indexOf("MSIE") >= 0) {  
        return 'ie';  
    }  
    //firefox  
    else if (explorer.indexOf("Firefox") >= 0) {  
        return 'Firefox';  
    }  
    //Chrome  
    else if(explorer.indexOf("Chrome") >= 0){  
        return 'Chrome';  
    }  
    //Opera  
    else if(explorer.indexOf("Opera") >= 0){  
        return 'Opera';  
    }  
    //Safari  
    else if(explorer.indexOf("Safari") >= 0){  
        return 'Safari';  
    }  
}  

function exportExcel(tableid) {  
    if(getExplorer()=='ie')  
    {  
        var curTbl = document.getElementById(tableid);  
        var oXL = new ActiveXObject("Excel.Application");  
        var oWB = oXL.Workbooks.Add();  
        var xlsheet = oWB.Worksheets(1);  
        var sel = document.body.createTextRange();  
        sel.moveToElementText(curTbl);  
        sel.select();  
        sel.execCommand("Copy");  
        xlsheet.Paste();  
        oXL.Visible = true;  
        try {  
            var fname = oXL.Application.GetSaveAsFilename("Excel.xls",filename);  
        } catch (e) {  
            print("Nested catch caught " + e);  
        } finally {  
            oWB.SaveAs(fname);  
            oWB.Close(savechanges = false);  
            oXL.Quit();  
            oXL = null;  
            idTmr = window.setInterval("Cleanup();", 1);  
        }  
    }  
    else  
    {  
        tableToExcel(tableid);
    }  
}  
function Cleanup() {  
    window.clearInterval(idTmr);  
    CollectGarbage();  
}  

var tableToExcel = (function() {  
    var uri = 'data:application/vnd.ms-excel;base64,',  
    template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel"'+
    'xmlns="http://www.w3.org/TR/REC-html40"><head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet>'
    +'<x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets>'
    +'</x:ExcelWorkbook></xml><![endif]-->'+
    ' <style type="text/css">'+
    '.excelTable  {'+
    'border-collapse:collapse;'+
     ' border:thin solid #999; '+
    '}'+
    '   .excelTable  th {'+
    '   border: thin solid #999;'+
    '  padding:20px;'+
    '  text-align: center;'+
    '  border-top: thin solid #999;'+
    ' background-color: #E6E6E6;'+
    ' }'+
    ' .excelTable  td{'+
    ' border:thin solid #999;'+
    '  padding:2px 5px;'+
    '  text-align: center;'+
    ' }</style>'+
    '</head><body ><table class="excelTable">{table}</table></body></html>',  
            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(table, name) {  
        if (!table.nodeType) table = document.getElementById(table)  ;
        var ctx = {worksheet: name || 'Worksheet', table: table.innerHTML} ; 
       // window.location.href = uri + base64(format(template, ctx))  ;
       document.getElementById("exportExcel").href = uri + base64(format(template, ctx));
       document.getElementById("exportExcel").download = filename;
     //  document.getElementById("exportExcel").click();
    }  ;
})()  ;

function Cleanup() {  
    window.clearInterval(idTmr);  
    CollectGarbage();  
}

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原文地址：https://www.cnblogs.com/embraceU/p/9235721.html