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

Home

Web Front-end

JS Tutorial

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

php中世界最好的语言

Mar 12, 2018 pm 02:37 PM

excelaccomplish

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>

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>

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()

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!

Related reading:

Website using nodejs for introduction

How to add element UI components to Vue

How to create a 1px border effect on the mobile terminal

The above is the detailed content of How to use s-xlsx to import and export Excel files (Part 1). For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Python vs. JavaScript: The Learning Curve and Ease of UseApr 16, 2025 am 12:12 AM

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python vs. JavaScript: Community, Libraries, and ResourcesApr 15, 2025 am 12:16 AM

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

From C/C to JavaScript: How It All WorksApr 14, 2025 am 12:05 AM

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

JavaScript Engines: Comparing ImplementationsApr 13, 2025 am 12:05 AM

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

Beyond the Browser: JavaScript in the Real WorldApr 12, 2025 am 12:06 AM

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.

Building a Multi-Tenant SaaS Application with Next.js (Backend Integration)Apr 11, 2025 am 08:23 AM

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing

How to Build a Multi-Tenant SaaS Application with Next.js (Frontend Integration)Apr 11, 2025 am 08:22 AM

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base

JavaScript: Exploring the Versatility of a Web LanguageApr 11, 2025 am 12:01 AM

JavaScript is the core language of modern web development and is widely used for its diversity and flexibility. 1) Front-end development: build dynamic web pages and single-page applications through DOM operations and modern frameworks (such as React, Vue.js, Angular). 2) Server-side development: Node.js uses a non-blocking I/O model to handle high concurrency and real-time applications. 3) Mobile and desktop application development: cross-platform development is realized through ReactNative and Electron to improve development efficiency.

See all articles