Marvin
3 years ago
4 changed files with 272 additions and 18 deletions
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/* |
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* @Author: Jeffrey Wang |
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* @Desc: 改造网络上 xlsx 代码而成，如有侵权，请联系我删掉重写(～￣▽￣)～ |
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* @Date: 2018-03-24 09:54:17 |
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* @Last Modified by: Jeffrey Wang |
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* @Last Modified time: 2018-12-14 21:45:50 |
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*/ |
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layui.define(['xlsx'], function(exports){ |
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exports('excel', { |
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saveAs : function(obj, fileName) {//可以自定义简单的下载文件实现方式
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var tmpa = document.createElement("a"); |
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tmpa.download = fileName || "下载"; |
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tmpa.href = URL.createObjectURL(obj); //绑定a标签
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tmpa.click(); //模拟点击实现下载
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setTimeout(function () { //延时释放
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URL.revokeObjectURL(obj); //用URL.revokeObjectURL()来释放这个object URL
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}, 100); |
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}, |
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// const wopts = { bookType: 'xlsx', bookSST: false, type: 'binary' };//这里的数据是用来定义导出的格式类型
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// const wopts = { bookType: 'csv', bookSST: false, type: 'binary' };//ods格式
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// const wopts = { bookType: 'ods', bookSST: false, type: 'binary' };//ods格式
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// const wopts = { bookType: 'xlsb', bookSST: false, type: 'binary' };//xlsb格式
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// const wopts = { bookType: 'fods', bookSST: false, type: 'binary' };//fods格式
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// const wopts = { bookType: 'biff2', bookSST: false, type: 'binary' };//xls格式
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//
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// 弹出下载框
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downloadExcel : function(data, filename, type) { |
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type = type || 'xlsx'; |
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var wopts = { bookType: type, bookSST: false, type: 'binary' } |
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const wb = { SheetNames: ['Sheet1'], Sheets: {}, Props: {} }; |
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wb.Sheets['Sheet1'] = XLSX.utils.json_to_sheet(data, { skipHeader: true});//通过json_to_sheet转成单页(Sheet)数据
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this.saveAs(new Blob([this.s2ab(XLSX.write(wb, wopts))], { type: "application/octet-stream" }), filename + '.' + (wopts.bookType=="biff2"?"xls":wopts.bookType)); |
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}, |
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s2ab : function(s) { |
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if (typeof ArrayBuffer !== 'undefined') { |
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var buf = new ArrayBuffer(s.length); |
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var view = new Uint8Array(buf); |
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for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF; |
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return buf; |
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} else { |
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var buf = new Array(s.length); |
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for (var i = 0; i != s.length; ++i) buf[i] = s.charCodeAt(i) & 0xFF; |
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return buf; |
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} |
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}, |
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/** |
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* 梳理导出的数据，包括字段排序和多余数据过滤 |
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* @param {[type]} data [需要梳理的数据] |
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* @param {[type]} fields [支持数组和对象，用于映射关系和字段排序] |
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* @return {[type]} [description] |
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*/ |
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filterExportData(data, fields) { |
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// PS:之所以不直接引用 data 节省内存，是因为担心如果 fields 可能存在如下情况： { "id": 'test_id', 'test_id': 'new_id' }，会导致处理异常
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var exportData = []; |
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var true_fields = []; |
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// filed 支持两种模式，数组则单纯排序，对象则转换映射关系，为了统一处理，将数组转换为符合要求的统一对象
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if (Array.isArray(fields)) { |
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for (var i in fields) { |
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true_fields[fields[i]] = fields[i]; |
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} |
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} else { |
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true_fields = fields; |
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} |
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for (i in data) { |
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var item = data[i]; |
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exportData[i] = {}; |
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for (key in true_fields) { |
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var old_field_name = key; |
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var new_field_name = true_fields[key]; |
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if (typeof item[old_field_name] != 'undefined') { |
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exportData[i][new_field_name] = item[old_field_name]; |
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} else { |
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exportData[i][new_field_name] = ''; |
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} |
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} |
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} |
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return exportData; |
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} |
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}); |
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}); |
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