html json 导出Excel

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title></title>
    <script src="http://oss.sheetjs.com/js-xlsx/xlsx.full.min.js"></script>
</head>

<body>
    <button id="button">导出Excel</button>
    
    <script>
        var json = [
        { //测试数据
            "保质期临期预警(天)": "adventLifecycle",
            "商品标题": "title",
            "建议零售价": "defaultPrice",
            "高(cm)": "height",
            "商品描述": "Description",
            "保质期禁售(天)": "lockupLifecycle",
            "商品名称": "skuName",
            "商品简介": "brief",
            "宽(cm)": "width",
            "阿达": "asdz",
            "货号": "goodsNo",
            "商品条码": "skuNo",
            "商品品牌": "brand",
            "净容积(cm^3)": "netVolume",
            "是否保质期管理": "isShelfLifeMgmt",
            "是否串号管理": "isSNMgmt",
            "商品颜色": "color",
            "尺码": "size",
            "是否批次管理": "isBatchMgmt",
            "商品编号": "skuCode",
            "商品简称": "shortName",
            "毛重(g)": "grossWeight",
            "长(cm)": "length",
            "英文名称": "englishName",
            "净重(g)": "netWeight",
            "商品分类": "categoryId",
            "这里超过了": 1111.0,
            "保质期(天)": "expDate"
        } ,{ //测试数据
            "保质期临期预警(天)": "adventLifecycle22",
            "商品标题": "title22",
            "建议零售价": "defaultPrice2",
            "高(cm)": "height2",
            "商品描述": "Description2",
            "保质期禁售(天)": "lockupLifecycle2",
            "商品名称": "skuName2",
            "商品简介": "brief2",
            "宽(cm)": "width2",
            "阿达": "asdz2",
            "货号": "goodsNo2",
            "商品条码": "skuNo2",
            "商品品牌": "brand2",
            "净容积(cm^3)": "netVolume2",
            "是否保质期管理": "isShelfLifeMgmt2",
            "是否串号管理": "isSNMgmt2",
            "商品颜色": "color2",
            "尺码": "size2",
            "是否批次管理": "isBatchMgmt2",
            "商品编号": "skuCode2",
            "商品简称": "shortName2",
            "毛重(g)": "grossWeight2",
            "长(cm)": "length2",
            "英文名称": "englishName2",
            "净重(g)": "netWeight2",
            "商品分类": "categoryId2",
            "这里超过了": "1111.02",
            "保质期(天)": "expDate2"
        }];

        document.getElementById("button").onclick = function(){
            downloadExl(json, 'xlsx')
        }

        var tmpDown; //导出的二进制对象
        function downloadExl(json, type) {
            var json = JSON.parse(JSON.stringify(json));
            var tmpdata = json[0];
            json.unshift({});
            var keyMap = []; //获取keys
            //keyMap =Object.keys(json[0]);
            for (var k in tmpdata) {
                keyMap.push(k);
                json[0][k] = k;
            }
            var tmpdata = [];//用来保存转换好的json 
                json.map((v, i) => keyMap.map((k, j) => Object.assign({}, {
                    v: v[k],
                    position: (j > 25 ? getCharCol(j) : String.fromCharCode(65 + j)) + (i + 1)
                }))).reduce((prev, next) => prev.concat(next)).forEach((v, i) => tmpdata[v.position] = {
                    v: v.v
                });
                console.log(json);
                console.log(tmpdata);

                var outputPos = Object.keys(tmpdata); //设置区域,比如表格从A1到D10
                var tmpWB = {
                    SheetNames: ['mySheet','my'], //保存的表标题
                    Sheets: {
                        'mySheet': Object.assign({},
                            tmpdata, //内容
                            {
                                '!ref': outputPos[0] + ':' + outputPos[outputPos.length - 1] //设置填充区域
                            }),
                        'my': Object.assign({},
                            tmpdata, //内容
                            {
                                '!ref': outputPos[0] + ':' + outputPos[outputPos.length - 1] //设置填充区域
                            }),

                    }
                };
                console.log(tmpWB,'twb')
                tmpDown = new Blob([s2ab(XLSX.write(tmpWB, 
                    {bookType: (type == undefined ? 'xlsx':type),bookSST: false, type: 'binary'}//这里的数据是用来定义导出的格式类型
                    ))], {
                    type: ""
                }); //创建二进制对象写入转换好的字节流
               
            var href = URL.createObjectURL(tmpDown); //创建对象超链接
　　　　　　　//模拟点击下载
            var aDownLoad = document.createElement("a");
            aDownLoad.href = href;
            aDownLoad.download = 'href.xlsx';
            aDownLoad.click();

            setTimeout(function() { 
                URL.revokeObjectURL(tmpDown); //用URL.revokeObjectURL()来释放这个object URL
            }, 100);
        }

        function s2ab(s) { //字符串转字符流
            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;
        }
         // 将指定的自然数转换为26进制表示。映射关系：[0-25] -> [A-Z]。
        function getCharCol(n) {
            let temCol = '',
            s = '',
            m = 0
            while (n > 0) {
                m = n % 26 + 1
                s = String.fromCharCode(m + 64) + s
                n = (n - m) / 26
            }
            return s
        }
    </script>
</body>

</html>
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