html读写excle文档

import

<!DOCTYPE html>
<html>
 
    <head>    
        <meta charset="UTF-8">
        <title></title>
        <script src="http://oss.sheetjs.com/js-xlsx/xlsx.full.min.js"></script>
                
        <style>
            pre {outline: 1px solid #ccc; padding: 5px; margin: 5px; }
            .string { color: green; }
            .number { color: darkorange; }
            .boolean { color: blue; }
            .null { color: magenta; }
            .key { color: red; }
        </style>
        
    </head>
    
    <body>
            
        <input type="file"onchange="importf(this)" />
        <div id="demo"></div>
        
        <pre id="result">
        </pre>
    
        <script>
        /*
        FileReader共有4种读取方法：
        1.readAsArrayBuffer(file)：将文件读取为ArrayBuffer。
        2.readAsBinaryString(file)：将文件读取为二进制字符串
        3.readAsDataURL(file)：将文件读取为Data URL
        4.readAsText(file, [encoding])：将文件读取为文本，encoding缺省值为'UTF-8'
                     */
        var wb;//读取完成的数据
        var rABS = false; //是否将文件读取为二进制字符串

        function importf(obj) {//导入
            if(!obj.files) {
                return;
            }
            var f = obj.files[0];
            var reader = new FileReader();
            reader.onload = function(e) {
                var data = e.target.result;
                if(rABS) {
                    wb = XLSX.read(btoa(fixdata(data)), {//手动转化
                        type: 'base64'
                    });
                } else {
                    wb = XLSX.read(data, {
                        type: 'binary'
                    });
                }
                //wb.SheetNames[0]是获取Sheets中第一个Sheet的名字
                //wb.Sheets[Sheet名]获取第一个Sheet的数据
                document.getElementById("result").innerHTML= syntaxHighlight(XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]));
                //document.getElementById("result").innerHTML= syntaxHighlight(JSON.stringify( XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]])));
                
                
            };
            if(rABS) {
                reader.readAsArrayBuffer(f);
            } else {
                reader.readAsBinaryString(f);
            }
        }

        function fixdata(data) { //文件流转BinaryString
            var o = "",
                l = 0,
                w = 10240;
            for(; l < data.byteLength / w; ++l) o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w, l * w + w)));
            o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w)));
            return o;
        }
        
        
        function syntaxHighlight(json) {
            if (typeof json != 'string') {
                json = JSON.stringify(json, undefined, 2);
            }
            json = json.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
            return json.replace(/("(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g, function(match) {
                var cls = 'number';
                if (/^"/.test(match)) {
                    if (/:$/.test(match)) {
                        cls = 'key';
                    } else {
                        cls = 'string';
                    }
                } else if (/true|false/.test(match)) {
                    cls = 'boolean';
                } else if (/null/.test(match)) {
                    cls = 'null';
                }
                return '<span class="' + cls + '">' + match + '</span>';
            });
        }
 
        </script>
    </body>
</html>

export

<!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 onclick="downloadExl(jsono)">导出</button>
    <!--
            以下a标签不需要内容
        -->
    <a href="" download="这里是下载的文件名.xlsx" id="hf"></a>
    <script>
        var jsono = [{ //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"
        }];
        var tmpDown; //导出的二进制对象
        function downloadExl(json, type) {
            var tmpdata = json[0];
            json.unshift({});
            var keyMap = []; //获取keys
            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
                });
                var outputPos = Object.keys(tmpdata); //设置区域,比如表格从A1到D10
                var tmpWB = {
                    SheetNames: ['mySheet'], //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
                            })
                    }
                };
                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
            document.getElementById("hf").href = href; //绑定a标签
            document.getElementById("hf").click(); //模拟点击实现下载
            setTimeout(function() { //延时释放
                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>

参考

https://blog.csdn.net/weixin_36185028/article/details/78685844

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