async success({ header, results }) { // 如果是导入用户 const userRelations = { '入职日期': 'create_time', '手机号': 'mobile', '用户名': 'username', '密码': 'password', '邮箱': 'email', '部门':'部门' } const arr = [] results.forEach(item => { const userInfo = {} Object.keys(item).forEach(key => { userInfo[userRelations[key]] = item[key] }) arr.push(userInfo) }) await importUser(arr) // 调用导入接口 this.$router.back() }
为了让这个页面可以服务更多的导入功能，我们可以在页面中用参数来判断，是否是导入用户
data() { return { type: this.$route.query.type } },
当excel中有日期格式的时候，实际转化的值为一个数字，我们需要一个方法进行转化
formatDate(numb, format) { 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) }
导入的手机号不能和之前的存在的手机号重复
逻辑判断
async success({ header, results }) { if (this.type === 'user') { const userRelations = { '入职日期': 'create_time', '手机号': 'mobile', '用户名': 'username', '密码': 'password', '邮箱': 'email', '部门':'部门' } const arr = [] // 遍历所有的数组 results.forEach(item => { // 需要将每一个条数据里面的中文都换成英文 const userInfo = {} Object.keys(item).forEach(key => { // key是当前的中文名 找到对应的英文名 if (userRelations[key] === 'timeOfEntry' || userRelations[key] === 'correctionTime') { userInfo[userRelations[key]] = new Date(this.formatDate(item[key], 'https://www.jb51.net/')) // 只有这样, 才能入库 return } userInfo[userRelations[key]] = item[key] }) // 最终userInfo变成了全是英文 arr.push(userInfo) }) await importUser(arr) this.$message.success('导入成功') } this.$router.back() // 回到上一页 }, formatDate(numb, format) { 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) }
用户页面跳转
<el-button type="warning" size="small" @click="$router.push('/import?type=user')">导入</el-button>
用户导出**
日常业务中，我们经常遇到excel导出功能， 怎么使用呢
Excel 的导入导出都是依赖于js-xlsx来实现的。
在 js-xlsx的基础上又封装了Export2Excel.js来方便导出数据。
安装所需依赖
npm install xlsx file-saver -S npm install script-loader -S -D
由于js-xlsx体积还是很大的，导出功能也不是一个非常常用的功能，所以使用的时候建议使用懒加载。使用方法如下：
import('@/vendor/Export2Excel').then(excel => { excel.export_json_to_excel({ header: tHeader, //表头 必填 data, //具体数据 必填 filename: 'excel-list', //非必填 autoWidth: true, //非必填 bookType: 'xlsx' //非必填 }) })
excel导出参数的介绍
vue-element-admin提供了导出的功能模块，在课程资源/excel导出目录下，放置到src目录下
excel导出基本的结构
下面代码会用到 Export2Excel.js 模块，所以首先在 src 目录下新建 vendor 目录，其中新建 Export2Excel.js ，输入如下代码
/* 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}`); }
因为数据中的key是英文，想要导出的表头是中文的话，需要将中文和英文做对应
const headers = { '入职日期': 'create_time', '手机号': 'mobile', '用户名': 'username', '角色': 'role_name', '邮箱': 'email', '部门': 'department_name' }
完成导出代码