js通过拼接table导出Excel,但数据行数有5万多行，一点击下载就出现网络错误

js通过拼接table导出Excel,但数据行数有5万多行，一点击下载就出现网络错误，数据量少时正常下载
代码如下：

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 toExcel(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", "Excel Spreadsheets (*.xls), *.xls");
        } 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,'name', '项目分期报表.xls')
    }
}
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">\n' +
        '        #table thead{width:100%;z-index:5;}\n' +
        '        #table td{overflow: hidden;text-overflow: ellipsis;white-space: nowrap;table-layout: fixed;padding-right: 0;}\n' +
        '        #table .project_title{background-color: #88e1ff;font-weight: bold;}\n' +
        '        #table .batch_title {font-weight: bold}\n' +
        '        #table .not_end{color: red;}\n' +
        '        #table tbody tr>td{text-align: left;padding-left: 5px;}'+
        '        .not_charge{color: blue}\n' +
        '        .charge{color: green}\n' +
        '        .pay_month{color: purple}\n' +
        '    </style>'+
        '</head><body><table id="table">{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, filename) {
        if (!table.nodeType) table = document.getElementById(table)
        var ctx = { worksheet: name || 'Worksheet', table: table.innerHTML }
        document.getElementById("dlink").href = uri + base64(format(template, ctx));
        document.getElementById("dlink").download = filename;
        document.getElementById("dlink").click();

    }
})()
</script>

请问各位大神我该怎么写才能让这个excel可以下载下来。

猛跑小猪

浏览 1631回答 1

1回答

有只小跳蛙

因为浏览器URL有长度限制. 你这种方法是将 excel数据转换成 base64. 数据量大的时候长度超过浏览器GET 限制. 部分被阻断了. 就自然识别不出来这个excel. 具体解决办法使用blob对象. let blob = new Blob([format(template, ctx]); document.getElementById("dlink").href = URL.createObjectURL(blob)

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