mahyuan / Front_end_basics

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JsonExportToCSV #12

Open mahyuan opened 5 years ago

mahyuan commented 5 years ago

引用来源

(function (global, factory) {
    "use strict";
    if (typeof module === "object" && typeof module.exports === "object") {
        module.exports = global.document ?
            factory(global, true) :
            function (w) {
                return factory(w);
            };
    } else {
        factory(global);
    }
})(window, function () {
    var JSonToCSV = {
        /*
         * obj是一个对象,其中包含有:
         * ## data 是导出的具体数据
         * ## fileName 是导出时保存的文件名称 是string格式
         * ## showLabel 表示是否显示表头 默认显示 是布尔格式
         * ## columns 是表头对象,且title和key必须一一对应,包含有
              title:[], // 表头展示的文字
              key:[], // 获取数据的Key
              formatter: function() // 自定义设置当前数据的 传入(key, value)
         */
        setDataConver: function (obj) {
            var bw = this.browser();
            if (bw['ie'] < 9) return; // IE9以下的
            var data = obj['data'],
                ShowLabel = typeof obj['showLabel'] === 'undefined' ? true : obj['showLabel'],
                fileName = (obj['fileName'] || 'UserExport') + '.csv',
                columns = obj['columns'] || {
                    title: [],
                    key: [],
                    formatter: undefined
                };
            var ShowLabel = typeof ShowLabel === 'undefined' ? true : ShowLabel;
            var row = "",
                CSV = '',
                key;
            // 如果要现实表头文字
            if (ShowLabel) {
                // 如果有传入自定义的表头文字
                if (columns.title.length) {
                    columns.title.map(function (n) {
                        row += n + ',';
                    });
                } else {
                    // 如果没有,就直接取数据第一条的对象的属性
                    for (key in data[0]) row += key + ',';
                }
                row = row.slice(0, -1); // 删除最后一个,号,即a,b, => a,b
                CSV += row + '\r\n'; // 添加换行符号
            }
            // 具体的数据处理
            data.map(function (n) {
                row = '';
                // 如果存在自定义key值
                if (columns.key.length) {
                    columns.key.map(function (m) {
                        row += '"' + (typeof columns.formatter === 'function' ? columns.formatter(m, n[m]) || n[m] : n[m]) + '",';
                    });
                } else {
                    for (key in n) {
                        row += '"' + (typeof columns.formatter === 'function' ? columns.formatter(key, n[key]) || n[key] : n[key]) + '",';
                    }
                }
                row.slice(0, row.length - 1); // 删除最后一个,
                CSV += row + '\r\n'; // 添加换行符号
            });
            if (!CSV) return;
            this.SaveAs(fileName, CSV);
        },
        SaveAs: function (fileName, csvData) {
            var bw = this.browser();
            if (!bw['edge'] || !bw['ie']) {
                var alink = document.createElement("a");
                alink.id = "linkDwnldLink";
                alink.href = this.getDownloadUrl(csvData);
                document.body.appendChild(alink);
                var linkDom = document.getElementById('linkDwnldLink');
                linkDom.setAttribute('download', fileName);
                linkDom.click();
                document.body.removeChild(linkDom);
            } else if (bw['ie'] >= 10 || bw['edge'] == 'edge') {
                var _utf = "\uFEFF";
                var _csvData = new Blob([_utf + csvData], {
                    type: 'text/csv'
                });
                navigator.msSaveBlob(_csvData, fileName);
            } else {
                var oWin = window.top.open("about:blank", "_blank");
                oWin.document.write('sep=,\r\n' + csvData);
                oWin.document.close();
                oWin.document.execCommand('SaveAs', true, fileName);
                oWin.close();
            }
        },
        getDownloadUrl: function (csvData) {
            var _utf = "\uFEFF"; // 为了使Excel以utf-8的编码模式,同时也是解决中文乱码的问题
            if (window.Blob && window.URL && window.URL.createObjectURL) {
                var csvData = new Blob([_utf + csvData], {
                    type: 'text/csv'
                });
                return URL.createObjectURL(csvData);
            }
            // return 'data:attachment/csv;charset=utf-8,' + _utf + encodeURIComponent(csvData);
        },
        browser: function () {
            var Sys = {};
            var ua = navigator.userAgent.toLowerCase();
            var s;
            (s = ua.indexOf('edge') !== -1 ? Sys.edge = 'edge' : ua.match(/rv:([\d.]+)\) like gecko/)) ? Sys.ie = s[1]:
                (s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :
                (s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :
                (s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :
                (s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :
                (s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;
            return Sys;
        }
    };
    window.JSonToCSV = JSonToCSV;
});