JavaScript导出excel文件实现

function getXlsFromTbl(inTblId, inWindow, fname) {
    try {
        var allStr = "";
        var curStr = "";
        // alert("getXlsFromTbl");
        if (inTblId != null && inTblId != "" && inTblId != "null") {
            curStr = getTblData(inTblId, inWindow);
        }
        // alert("curStr="+curStr);
        if (curStr != null) {
            allStr += curStr;
        } else {
            alert("你要导出的表格不存在！");
            return;
        }
        var fileName = getExcelFileName(fname);
        doFileExport(fileName, allStr);
    } catch (e) {
        alert("导出发生异常:" + e.name + "->" + e.description + "!");
    }
}
function getTblData(inTbl, inWindow) {
    var rows = 0;
    // alert("getTblData is " + inTbl + "==" + inWindow);
    var tblDocument = document;
    if (!!inWindow && inWindow != "") {
        if (!document.all(inWindow)) {
            return null;
        } else {
            tblDocument = eval(inWindow).document;
        }
    }
    var curTbl = tblDocument.getElementById(inTbl);
    var outStr = "";
    if (curTbl != null) {
        for (var j = 0; j < curTbl.rows.length; j++) {
            // alert("j is " + j);
            for (var i = 0; i < curTbl.rows[j].cells.length; i++) {
                // alert("i is " + i);
                if (i == 0 && rows > 0) {
                    outStr += " 	";
                    rows -= 1;
                }
                outStr += curTbl.rows[j].cells[i].innerText + "	";
                // alert();
                if (curTbl.rows[j].cells[i].colSpan > 1) {
                    for (var k = 0; k < curTbl.rows[j].cells[i].colSpan - 1; k++) {
                        outStr += " 	";
                    }
                }
                if (i == 0) {
                    if (rows == 0 && curTbl.rows[j].cells[i].rowSpan > 1) {
                        rows = curTbl.rows[j].cells[i].rowSpan - 1;
                    }
                }
            }
            if (j == 0)
                outStr = replaceAll(outStr, "
", ""); //替换掉回车换行
            outStr += "
";
            // alert(outStr);
        }
    } else {
        outStr = null;
        alert(inTbl + "不存在!");
    }
    return outStr;
}
function getExcelFileName(fname) {
    var d = new Date();
    var curYear = d.getYear();
    var curMonth = "" + (d.getMonth() + 1);
    var curDate = "" + d.getDate();
    var curHour = "" + d.getHours();
    var curMinute = "" + d.getMinutes();
    var curSecond = "" + d.getSeconds();
    if (curMonth.length == 1) {
        curMonth = "0" + curMonth;
    }
    if (curDate.length == 1) {
        curDate = "0" + curDate;
    }
    if (curHour.length == 1) {
        curHour = "0" + curHour;
    }
    if (curMinute.length == 1) {
        curMinute = "0" + curMinute;
    }
    if (curSecond.length == 1) {
        curSecond = "0" + curSecond;
    }
    var fileName = fname + "_" + curYear + curMonth + curDate + "_" + curHour
            + curMinute + curSecond + ".csv.html";
    // alert(fileName);
    return fileName;
}
function doFileExport(inName, inStr) {
    var xlsWin = null;
    if (!!document.all("glbHideFrm")) {
        xlsWin = glbHideFrm;
    } else {
        var width = 5;
        var height = 5;
        var openPara = "left=" + (window.screen.width / 2 - width / 2)
                + ",top=" + (window.screen.height / 2 - height / 2)
                + ",scrollbars=no,width=" + width + ",height=" + height;
        xlsWin = window.open("", "_blank", openPara);
    }
    xlsWin.document.write(inStr);
    xlsWin.document.close();
    
    xlsWin.document.execCommand('Saveas', true, inName);
    xlsWin.close();
}

function replaceAll(ss, s, r) {
    var rs = ss;
    // alert(rs+"="+r);
    // alert(rs.indexOf(s));
    while (rs.indexOf(s) != -1) {
        // alert("A="+rs);
        rs = rs.replace(s, r);
        // alert("B="+rs);
    }
    return rs;
}