<button onclick="downloadExl(jsono)">導出</button>
<!--
以下a標簽不需要內容
-->
<a href="" download="這裏是下載的文件名.xlsx" id="hf"></a>

    <script src="http://oss.sheetjs.com/js-xlsx/xlsx.full.min.js"></script>

<script>
        var jsono = [{ //測試數據
            "保質期臨期預警(天)": "adventLifecycle",
            "商品標題": "title",
            "建議零售價": "defaultPrice",
            "高(cm)": "height",
            "商品描述": "Description",
            "保質期禁售(天)": "lockupLifecycle",
            "商品名稱": "skuName",
            "商品簡介": "brief",
            "寬(cm)": "width",
            "阿達": "asdz",
            "貨號": "goodsNo",
            "商品條碼": "skuNo",
            "商品品牌": "brand",
            "凈容積(cm^3)": "netVolume",
            "是否保質期管理": "isShelfLifeMgmt",
            "是否串號管理": "isSNMgmt",
            "商品顏色": "color",
            "尺碼": "size",
            "是否批次管理": "isBatchMgmt",
            "商品編號": "skuCode",
            "商品簡稱": "shortName",
            "毛重(g)": "grossWeight",
            "長(cm)": "length",
            "英文名稱": "englishName",
            "凈重(g)": "netWeight",
            "商品分類": "categoryId",
            "這裏超過了": 1111.0,
            "保質期(天)": "expDate"
        }];
        var tmpDown; //導出的二進制對象
        function downloadExl(json, type) {
            var tmpdata = json[0];
            json.unshift({});
            var keyMap = []; //獲取keys
            for (var k in tmpdata) {
                keyMap.push(k);
                json[0][k] = k;
            }
          var tmpdata = [];//用來保存轉換好的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
                });
                var outputPos = Object.keys(tmpdata); //設置區域,比如表格從A1到D10
                var tmpWB = {
                    SheetNames: [‘mySheet‘], //保存的表標題
                    Sheets: {
                        ‘mySheet‘: Object.assign({},
                            tmpdata, //內容
                            {
                                ‘!ref‘: outputPos[0] + ‘:‘ + outputPos[outputPos.length - 1] //設置填充區域
                            })
                    }
                };
                tmpDown = new Blob([s2ab(XLSX.write(tmpWB, 
                    {bookType: (type == undefined ? ‘xlsx‘:type),bookSST: false, type: ‘binary‘}//這裏的數據是用來定義導出的格式類型
                    ))], {
                    type: ""
                }); //創建二進制對象寫入轉換好的字節流
            var href = URL.createObjectURL(tmpDown); //創建對象超鏈接
            document.getElementById("hf").href = href; //綁定a標簽
            document.getElementById("hf").click(); //模擬點擊實現下載
            setTimeout(function() { //延時釋放
                URL.revokeObjectURL(tmpDown); //用URL.revokeObjectURL()來釋放這個object URL
            }, 100);
        }

        function s2ab(s) { //字符串轉字符流
            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;
        }
         // 將指定的自然數轉換為26進制表示。映射關系：[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>

excel的導出