• JS导出、导入EXCEL(案例)


      插件下载地址:http://oss.sheetjs.com/js-xlsx/xlsx.full.min.js

    1、导出excel

    <!DOCTYPE html>
    <html>
    <head>
        <meta charset="UTF-8">
        <title>js导出excel</title>
    </head>
    <body>
        <button onclick="downloadExl(jsono)">导出</button>
        <a href="" download="我是导出来的测试文件.xlsx" id="downloadA"></a>
        
        <script src="xlsx.full.min.js"></script>
        <script>
            var jsono = [{
                             "姓名": "张三",
                             "年龄": "30",
                             "性别": ""
                         },{
                             "姓名": "李四",
                             "年龄": "40",
                             "性别": ""
                         },{
                             "姓名": "王五",
                             "年龄": "50",
                             "性别": ""
                         }];
            var tmpDown; //导出的二进制对象
            function downloadExl(json, type) {
                //根据json数据,获取excel的第一行(例如:姓名、年龄、性别)存至map
                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 = [];
                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
                });
                  
                  //设置区域,比如表格从A1到D10
                var outputPos = Object.keys(tmpdata); 
                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
                            })
                    }
                };
                
                  //创建二进制对象写入转换好的字节流
                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: ""
                });
                  
                var href = URL.createObjectURL(tmpDown); //创建对象超链接
                document.getElementById("downloadA").href = href; //绑定a标签
                document.getElementById("downloadA").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);
            }
     
              //字符串转字符流
            function s2ab(s) { 
                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>

    2、导出结果

    3、导入excel

    <!DOCTYPE html>
    <html>
    <head>
        <meta charset="UTF-8">
        <title>js导入excel</title>
    </head>
    <body>
        <input type="file"onchange="importf(this)" />
        <div id="excelContent"></div>
        <script src="xlsx.full.min.js"></script>
        <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
    
            //开始导入
            function importf(obj) {
                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
                     */
                    var excelJson = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]);
                    document.getElementById("excelContent").innerHTML= JSON.stringify( excelJson );
                };
                if(rABS) {
                    reader.readAsArrayBuffer(f);
                } else {
                    reader.readAsBinaryString(f);
                }
            }
    
            //文件流转BinaryString
            function fixdata(data) { 
                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>

    4、导入结果

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  • 原文地址:https://www.cnblogs.com/kawhileonardfans/p/10966043.html
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