JavaScript中如何导入excel,导入导出方式是什么
Admin 2022-08-12 群英技术资讯 354 次浏览
先下包(xlsx)
npm i xlsx
把数组里面中文的键修改成英文的键:
原因:因为中文的键后台不认识,只能修改成英文的键
success({ hearder, results }) { const userRelations = { 入职日期: "timeOfEntry", 手机号: "mobile", 姓名: "username", 转正日期: "correctionTime", 工号: "workNumber", }; var arr=[] results.forEach(item=>{ var userInfo={} Object.keys(item).forEach(key=>{ // 现在 key 是中文 userInfo[userRelations[key]]=item[key] // 将原来中文对应的值 赋值给原来英文对应的值 }) // item 是原来数据结构 中文 arr.push(userInfo) }) }
var newArr = results.map((item) => { var userInfo = {}; Object.keys(item).forEach((key) => { userInfo[userRelations[key]] = item[key]; // 将原来中文对应的值 赋值给原来英文对应的值 }); return userInfo; });
转化Excel日期格式:
var newArr = results.map((item) => { var userInfo = {}; Object.keys(item).forEach((key) => { if ( userRelations[key] === "timeOfEntry" || userRelations[key] === "correctionTime" ) { //因为后端接口 限制了不能是字符串 要求转换时间类型,不然会变成 NAN userInfo[userRelations[key]] = new Date( this.formatDate(item[key], "/")// 只有这样才能存入数据库 ); } else { userInfo[userRelations[key]] = item[key]; // 将原来中文对应的值 赋值给原来英文对应的值 } }); return userInfo; }); formatDate(numb, format) { // 代码是 copy 的,逻辑不用明白 const time = new Date((numb - 1) * 24 * 3600000 + 1) time.setYear(time.getFullYear() - 70) const year = time.getFullYear() + '' const month = time.getMonth() + 1 + '' const date = time.getDate() - 1 + '' if (format && format.length === 1) { return year + format + month + format + date } return year + (month < 10 ? '0' + month : month) + (date < 10 ? '0' + date : date) }
先下包(xlsx file-saver、script-loader(负责懒加载))
npm install script-loader -S -D
npm install xlsx file-saver -S
然后把两个文件给引到src目录下 Export2Excel.js Export2Zip.js
exportData() { const headers = { 姓名: "username", 手机号: "mobile", 入职日期: "timeOfEntry", 聘用形式: "formOfEmployment", 转正日期: "correctionTime", 工号: "workNumber", 部门: "departmentName", }; import("@/vendor/Export2Excel").then(async (excel) => { const { rows } = await getEmployeeList({ page: 1, size: this.page.total, }); const data = this.formatJson(headers, rows); // 返回的data就是要导出的结构 excel.export_json_to_excel({ header: Object.keys(headers), data, }); }); }, formatJson(headers, rows) { // 首先遍历数组 return rows.map((item) => { // item是一个对象 {mobile:13213,username:'张三'} return Object.keys(headers).map((key) => { if ( headers[key] === "timeOfEntry" || headers[key] === "correctionTime" ) { // 格式化日期 return formatDate(item[headers[key]]); } else if (headers[key] === "formOfEmployment") { const obj = EmployeeEnum.hireType.find( (obj) => obj.id === item[headers[key]] ); return obj ? obj.value : "未知"; } return item[headers[key]]; }); }); },
Excel表格合并
const multiHeader = [["姓名", "主要信息", "", "", "", "", "部门"]]; const merges = ["A1:A2", "B1:F1", "G1:G2"]; // 要合并Excel的表格,从多少到多少 excel.export_json_to_excel({ header: Object.keys(headers), data, filename: "员工资料表", multiHeader, // 复杂表头 merges, // 合并选项 });
需要引入的代码文件:(代码无需理解,copy就行)
Export2Excel.js代码:
/* eslint-disable */ import { saveAs } from 'file-saver' import XLSX from 'xlsx' function generateArray(table) { var out = []; var rows = table.querySelectorAll('tr'); var ranges = []; for (var R = 0; R < rows.length; ++R) { var outRow = []; var row = rows[R]; var columns = row.querySelectorAll('td'); for (var C = 0; C < columns.length; ++C) { var cell = columns[C]; var colspan = cell.getAttribute('colspan'); var rowspan = cell.getAttribute('rowspan'); var cellValue = cell.innerText; if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue; //Skip ranges ranges.forEach(function (range) { if (R >= range.s.r && R <= range.e.r && outRow.length >= range.s.c && outRow.length <= range.e.c) { for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null); } }); //Handle Row Span if (rowspan || colspan) { rowspan = rowspan || 1; colspan = colspan || 1; ranges.push({ s: { r: R, c: outRow.length }, e: { r: R + rowspan - 1, c: outRow.length + colspan - 1 } }); }; //Handle Value outRow.push(cellValue !== "" ? cellValue : null); //Handle Colspan if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null); } out.push(outRow); } return [out, ranges]; }; function datenum(v, date1904) { if (date1904) v += 1462; var epoch = Date.parse(v); return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000); } function sheet_from_array_of_arrays(data, opts) { var ws = {}; var range = { s: { c: 10000000, r: 10000000 }, e: { c: 0, r: 0 } }; for (var R = 0; R != data.length; ++R) { for (var C = 0; C != data[R].length; ++C) { if (range.s.r > R) range.s.r = R; if (range.s.c > C) range.s.c = C; if (range.e.r < R) range.e.r = R; if (range.e.c < C) range.e.c = C; var cell = { v: data[R][C] }; if (cell.v == null) continue; var cell_ref = XLSX.utils.encode_cell({ c: C, r: R }); if (typeof cell.v === 'number') cell.t = 'n'; else if (typeof cell.v === 'boolean') cell.t = 'b'; else if (cell.v instanceof Date) { cell.t = 'n'; cell.z = XLSX.SSF._table[14]; cell.v = datenum(cell.v); } else cell.t = 's'; ws[cell_ref] = cell; } } if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range); return ws; } function Workbook() { if (!(this instanceof Workbook)) return new Workbook(); this.SheetNames = []; this.Sheets = {}; } 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; } export function export_table_to_excel(id) { var theTable = document.getElementById(id); var oo = generateArray(theTable); var ranges = oo[1]; /* original data */ var data = oo[0]; var ws_name = "SheetJS"; var wb = new Workbook(), ws = sheet_from_array_of_arrays(data); /* add ranges to worksheet */ // ws['!cols'] = ['apple', 'banan']; ws['!merges'] = ranges; /* add worksheet to workbook */ wb.SheetNames.push(ws_name); wb.Sheets[ws_name] = ws; var wbout = XLSX.write(wb, { bookType: 'xlsx', bookSST: false, type: 'binary' }); saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), "test.xlsx") } export function export_json_to_excel({ multiHeader = [], header, data, filename, merges = [], autoWidth = true, bookType = 'xlsx' } = {}) { /* original data */ filename = filename || 'excel-list' data = [...data] data.unshift(header); for (let i = multiHeader.length - 1; i > -1; i--) { data.unshift(multiHeader[i]) } var ws_name = "SheetJS"; var wb = new Workbook(), ws = sheet_from_array_of_arrays(data); if (merges.length > 0) { if (!ws['!merges']) ws['!merges'] = []; merges.forEach(item => { ws['!merges'].push(XLSX.utils.decode_range(item)) }) } if (autoWidth) { /*设置worksheet每列的最大宽度*/ const colWidth = data.map(row => row.map(val => { /*先判断是否为null/undefined*/ if (val == null) { return { 'wch': 10 }; } /*再判断是否为中文*/ else if (val.toString().charCodeAt(0) > 255) { return { 'wch': val.toString().length * 2 }; } else { return { 'wch': val.toString().length }; } })) /*以第一行为初始值*/ let result = colWidth[0]; for (let i = 1; i < colWidth.length; i++) { for (let j = 0; j < colWidth[i].length; j++) { if (result[j]['wch'] < colWidth[i][j]['wch']) { result[j]['wch'] = colWidth[i][j]['wch']; } } } ws['!cols'] = result; } /* add worksheet to workbook */ wb.SheetNames.push(ws_name); wb.Sheets[ws_name] = ws; var wbout = XLSX.write(wb, { bookType: bookType, bookSST: false, type: 'binary' }); saveAs(new Blob([s2ab(wbout)], { type: "application/octet-stream" }), `${filename}.${bookType}`); }
Export2Zip.js代码:
/* eslint-disable */ import { saveAs } from 'file-saver' import JSZip from 'jszip' export function export_txt_to_zip(th, jsonData, txtName, zipName) { const zip = new JSZip() const txt_name = txtName || 'file' const zip_name = zipName || 'file' const data = jsonData let txtData = `${th}\r\n` data.forEach((row) => { let tempStr = '' tempStr = row.toString() txtData += `${tempStr}\r\n` }) zip.file(`${txt_name}.txt`, txtData) zip.generateAsync({ type: "blob" }).then((blob) => { saveAs(blob, `${zip_name}.zip`) }, (err) => { alert('导出失败') }) }
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:mmqy2019@163.com进行举报,并提供相关证据,查实之后,将立刻删除涉嫌侵权内容。
猜你喜欢
Next.js 是一个轻量级的 React 服务端渲染应用框架。文中通过示例代码介绍的非常详细,需要的朋友们下面随着小编来一起学习学习吧
Vue-loader 是 Webpack 的加载模块,它使我们可以用 Vue 文件格式编写单文件组件。单文件组件文件有三个部分,(模板、脚本和样式)。 vue-loader 模块允许 webpack
这篇文章主要为大家详细介绍了jQuery实现表格行数据滚动,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
这篇文章主要介绍了Element el-button 按钮组件的使用详解,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
目录一、正则元字符1、 字符元字符2、重复元字符(量词)3、定位元字符4、分组和替换字符5、特殊字符6、需要转义的字符7、贪婪与非贪婪匹配8、常见正则表达式二、正则表达式应用举例1、验证表达式vs中批量操作三、文件夹中的文件内容正则批量替换1、使用VSCode文件替换(使用JS引擎)2、文件夹中的文件内容正则批量替换一
成为群英会员,开启智能安全云计算之旅
立即注册Copyright © QY Network Company Ltd. All Rights Reserved. 2003-2020 群英 版权所有
增值电信经营许可证 : B1.B2-20140078 粤ICP备09006778号 域名注册商资质 粤 D3.1-20240008