How to use s-xlsx to import and export Excel files (Part 1)-JS Tutorial-php.cn

How to use s-xlsx to import and export Excel files (Part 1)

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Release： 2018-03-12 14:37:29

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This time I will show you how to use s-xlsx to import and export Excel files, and how to use s-xlsx to import and export Excel files. What are the precautions?The following is a practical case, let's come together take a look.

Import function implementation

Download js-xlsx to dist, copy xlsx.full.min.js and introduce it into the page
Then read the file through the FileReader object Use js-xlsx to convert json data
Code implementation (==>example<==)

<!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>
        <input type="file"onchange="importf(this)" />
        <p id="demo"></p>
        <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&#39;UTF-8&#39;
                         */
            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: &#39;base64&#39;
                        });
                    } else {
                        wb = XLSX.read(data, {                            type: &#39;binary&#39;
                        });
                    }                    //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("demo").innerHTML= 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;
            }        </script>
    </body></html>

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2. Implementation of the export function

Also introduce js-xlsx
Code implementation (==>Example<==)

<!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
            //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
                });                var outputPos = Object.keys(tmpdata); //设置区域,比如表格从A1到D10
                var tmpWB = {                    SheetNames: [&#39;mySheet&#39;], //保存的表标题
                    Sheets: {                        &#39;mySheet&#39;: Object.assign({},
                            tmpdata, //内容
                            {                                &#39;!ref&#39;: outputPos[0] + &#39;:&#39; + outputPos[outputPos.length - 1] //设置填充区域
                            })
                    }
                };
                tmpDown = new Blob([s2ab(XLSX.write(tmpWB, 
                    {bookType: (type == undefined ? &#39;xlsx&#39;:type),bookSST: false, type: &#39;binary&#39;}//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 = &#39;&#39;,
            s = &#39;&#39;,
            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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3. Use Python to convert excel to Json to create test data

Code

import sysimport xlrdimport json 
file =sys.argv[1] 
data = xlrd.open_workbook(file)
table=data.sheets()[0]def haveNoIndex(table):
    returnData=[]
    keyMap=table.row_values(0) 
    for i in range(table.nrows):#row
        tmpmp={}
        tmpInd=0
        for k in table.row_values(i): 
            tmpmp[keyMap[tmpInd]]=k
            tmpInd=tmpInd+1  
        returnData.append(tmpmp);    return json.dumps(returnData,ensure_ascii=False,indent=2)
returnJson= haveNoIndex(table) 
fp = open(file+".json","w",encoding=&#39;utf-8&#39;)
fp.write(returnJson)
fp.close()

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Export example The test data already contains a header. If there is no header, you can directly create a value=key ({key:key}) for the key traversing the first piece of data in json and insert it into the first piece of json.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!