目前的方案是第一种,前端主导
首先打开gitee,因为github相对比较慢很多(因为国外的网站嘛)
打开gitee搜索 vue-admin-element
把它的项目拉下来,下载一下依赖,然后让项目跑起来,我们要用人家一部分代码提取出来,
定位到需要代码区域给复制过来
因为他这个项目中需要下载相应的xlsx包 我们下载一下
yarn add xlsx -S 或者 npm install xlsx -S
这里我们需要个vue组件放置抽取出来的代码,在这的名字就叫 UploadExcel.vue
<template>
<div>
<input ref="excel-upload-input" class="excel-upload-input" type="file" accept=".xlsx, .xls" @change="handleClick">
<div class="drop" @drop="handleDrop" @dragover="handleDragover" @dragenter="handleDragover">
Drop excel file here or
<el-button :loading="loading" style="margin-left:16px;" size="mini" type="primary" @click="handleUpload">
Browse
</el-button>
</div>
</div>
</template>
<script>
import XLSX from 'xlsx'
export default {
props: {
beforeUpload: Function, // eslint-disable-line
onSuccess: Function// eslint-disable-line
},
data() {
return {
loading: false,
excelData: {
header: null,
results: null
}
}
},
methods: {
generateData({ header, results }) {
this.excelData.header = header
this.excelData.results = results
this.onSuccess && this.onSuccess(this.excelData)
},
handleDrop(e) {
e.stopPropagation()
e.preventDefault()
if (this.loading) return
const files = e.dataTransfer.files
if (files.length !== 1) {
this.$message.error('Only support uploading one file!')
return
}
const rawFile = files[0] // only use files[0]
if (!this.isExcel(rawFile)) {
this.$message.error('Only supports upload .xlsx, .xls, .csv suffix files')
return false
}
this.upload(rawFile)
e.stopPropagation()
e.preventDefault()
},
handleDragover(e) {
e.stopPropagation()
e.preventDefault()
e.dataTransfer.dropEffect = 'copy'
},
handleUpload() {
this.$refs['excel-upload-input'].click()
},
handleClick(e) {
const files = e.target.files
const rawFile = files[0] // only use files[0]
if (!rawFile) return
this.upload(rawFile)
},
upload(rawFile) {
this.$refs['excel-upload-input'].value = null // fix can't select the same excel
if (!this.beforeUpload) {
this.readerData(rawFile)
return
}
const before = this.beforeUpload(rawFile)
if (before) {
this.readerData(rawFile)
}
},
readerData(rawFile) {
this.loading = true
return new Promise((resolve, reject) => {
const reader = new FileReader()
reader.onload = e => {
const data = e.target.result
const workbook = XLSX.read(data, { type: 'array' })
const firstSheetName = workbook.SheetNames[0]
const worksheet = workbook.Sheets[firstSheetName]
const header = this.getHeaderRow(worksheet)
const results = XLSX.utils.sheet_to_json(worksheet)
this.generateData({ header, results })
this.loading = false
resolve()
}
reader.readAsArrayBuffer(rawFile)
})
},
getHeaderRow(sheet) {
const headers = []
const range = XLSX.utils.decode_range(sheet['!ref'])
let C
const R = range.s.r
/* start in the first row */
for (C = range.s.c; C <= range.e.c; ++C) { /* walk every column in the range */
const cell = sheet[XLSX.utils.encode_cell({ c: C, r: R })]
/* find the cell in the first row */
let hdr = 'UNKNOWN ' + C // <-- replace with your desired default
if (cell && cell.t) hdr = XLSX.utils.format_cell(cell)
headers.push(hdr)
}
return headers
},
isExcel(file) {
return /\.(xlsx|xls|csv)$/.test(file.name)
}
}
}
</script>
<style scoped>
.excel-upload-input{
display: none;
z-index: -9999;
}
.drop{
border: 2px dashed #bbb;
width: 600px;
height: 160px;
line-height: 160px;
margin: 0 auto;
font-size: 24px;
border-radius: 5px;
text-align: center;
color: #bbb;
position: relative;
}
</style>
新建一个公共的导入页面,即import路由组件 src/views/import
<template>
<upload-excel />
</template>
<script>
import UploadExcel from './UploadExcel'
export default {
name: 'Import',
components: {
UploadExcel
}
}
</script>
然后我们需要定义一个路由让他在什么区域显示
// 在这里是做的人资项目,会有左侧导航栏,显示与不显示的属性,我就不去掉了
// 我放到的是Layout的显示区域
{
path: '/import',
component: Layout,
hidden: true, // 不显示到左侧 不参与遍历
children: [{
path: '',
component: () => import('@/views/import')
}]
}
配置成功函数(excel解析成功之后自动调用)
<template>
<upload-excel :on-success="handleSuccess" :before-upload="beforeUpload" />
</template>
<script>
import UploadExcel from './UploadExcel'
// 这个是定义的后端接口需要修改的
import { importEmployee } from '@/api/employees'
// 这个是封装的一个函数,里面是处理数据的下面我会弄出来代码
import { getImportData } from '@/utils/excelData'
export default {
name: 'Import',
methods: {
beforeUpload(file) { // 放入文件校验和判断文件大小的
const isLt1M = file.size / 1024 / 1024 < 1
if (isLt1M) {
return true
}
this.$message({
message: '您的上传的文件已经超出1M!',
type: 'warning'
})
return false
},
async handleSuccess({ header, results }) { // 成功的回调
// 表格传入处理表格数据
const newArr = getImportData(results)
// 调用导入接口
await importEmployee(newArr) // 后端定义的接口
this.$router.back()
}
}
}
</script>
封装函数的js文件excelData.js
/**
* @description: 获取导出时的表头数据和表格数据
* @param {*} { sourceData:后端返回的源数据,header:表格头中因为对应关系}
* @return {*}
*/
export function getExportData(sourceData, header) {
const newArr = []
sourceData.forEach(item => {
const arr = []
Object.keys(item).forEach(key => {
if (Object.values(header).includes(key)) {
arr.push(item[key])
}
})
newArr.push(arr)
})
return {
header: Object.keys(header),
data: newArr
}
}
/**
* @description: 获取导入时的处理之后的接口数据
* @param {*} results
* @return {*}
*/
export function getImportData(results) {
const userRelations = {
'入职日期': 'timeOfEntry',
'手机号': 'mobile',
'姓名': 'username',
'转正日期': 'correctionTime',
'工号': 'workNumber'
}
const newArr = []
// 将所有的中文key转换成英文key 然后添加到新数组中
results.forEach(item => {
const map = {}
Object.keys(item).forEach(key => {
map[userRelations[key]] = item[key]
})
newArr.push(map)
})
// 时间处理
newArr.forEach(item => {
Object.keys(item).forEach(key => {
if (['correctionTime', 'timeOfEntry'].includes(key)) {
item[key] = new Date(formatDate(item[key], '/'))
}
})
})
return newArr
}
export function 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 < 10 ? '0' + month : month) + format + (date < 10 ? '0' + date : date)
}
return year + (month < 10 ? '0' + month : month) + (date < 10 ? '0' + date : date)
}
后边会做导出下载xlsx步骤的