1.前段后台管理系統中數據展示一般都是用表格,表格會涉及到導入和導出;原生js導出excel
2.導入是利用element-ui的Upload 上傳組件;
<el-upload class="upload-demo"
:action="importUrl"//上傳的路徑
:name ="name"//上傳的文件字段名
:headers="importHeaders"//請求頭格式
:on-preview="handlePreview"//可以通過 file.response 拿到服務端返回數據
:on-remove="handleRemove"//文件移除
:before-upload="beforeUpload"//上傳前配置
:on-error="uploadFail"//上傳錯誤
:on-success="uploadSuccess"//上傳成功
:file-list="fileList"//上傳的文件列表
:with-credentials="withCredentials">//是否支持cookie信息發送
</el-upload>
3.導出是利用file的一個對象blob;通過調用后台接口拿到數據,然后用數據來實例化blob,利用a標簽的href屬性鏈接到blob對象
const fileNames={
1:'模板一',
2:'模板二',
3:'模板三',
4:'模板四',
}
export const downloadTemplate = function (scheduleType) {
axios.get('/demo/template', {
params: {
"demoType": demoType
},
responseType: 'arraybuffer'
}).then((response) => {
//創建一個blob對象,file的一種
let blob = new Blob([response.data], { type: 'application/x-xls' })
let link = document.createElement('a')
link.href = window.URL.createObjectURL(blob)
//配置下載的文件名
link.download = fileNames[scheduleType] + '_' + response.headers.datestr + '.xls'
link.click()
})
}
4.貼上整個小demo的完整代碼,在后台開發可以直接拿過去用(vue文件)
<template>
<div>
<el-table
ref="multipleTable"
:data="tableData3"
tooltip-effect="dark"
border
style="width: 80%"
@selection-change="handleSelectionChange">
<el-table-column
type="selection"
width="55">
</el-table-column>
<el-table-column
label="日期"
width="120">
<template slot-scope="scope">{{ scope.row.date }}</template>
</el-table-column>
<el-table-column
prop="name"
label="姓名"
width="120">
</el-table-column>
<el-table-column
prop="address"
label="地址"
show-overflow-tooltip>
</el-table-column>
</el-table>
<div style="margin-top: 20px">
<el-button @click="toggleSelection([tableData3[1], tableData3[2]])">切換第二、第三行的選中狀態</el-button>
<el-button @click="toggleSelection()">取消選擇</el-button>
<el-button type="primary" @click="importData">導入</el-button>
<el-button type="primary" @click="outportData">導出</el-button>
</div>
<!-- 導入 -->
<el-dialog title="導入" :visible.sync="dialogImportVisible" :modal-append-to-body="false" :close-on-click-modal="false" class="dialog-import">
<div :class="{'import-content': importFlag === 1, 'hide-dialog': importFlag !== 1}">
<el-upload class="upload-demo"
:action="importUrl"
:name ="name"
:headers="importHeaders"
:on-preview="handlePreview"
:on-remove="handleRemove"
:before-upload="beforeUpload"
:on-error="uploadFail"
:on-success="uploadSuccess"
:file-list="fileList"
:with-credentials="withCredentials">
<!-- 是否支持發送cookie信息 -->
<el-button size="small" type="primary" :disabled="processing">{{uploadTip}}</el-button>
<div slot="tip" class="el-upload__tip">只能上傳excel文件</div>
</el-upload>
<div class="download-template">
<a class="btn-download" @click="download">
<i class="icon-download"></i>下載模板</a>
</div>
</div>
<div :class="{'import-failure': importFlag === 2, 'hide-dialog': importFlag !== 2}" >
<div class="failure-tips">
<i class="el-icon-warning"></i>導入失敗</div>
<div class="failure-reason">
<h4>失敗原因</h4>
<ul>
<li v-for="(error,index) in errorResults" :key="index">第{{error.rowIdx + 1}}行，錯誤：{{error.column}},{{error.value}},{{error.errorInfo}}</li>
</ul>
</div>
</div>
</el-dialog>
<!-- 導出 -->
</div>
</template>
<script>
import * as scheduleApi from '@/api/schedule'
export default {
data() {
return {
tableData3: [
{
date: "2016-05-03",
name: "王小虎",
address: "上海市普陀區金沙江路 1518 弄"
},
{
date: "2016-05-02",
name: "王小虎",
address: "上海市普陀區金沙江路 1518 弄"
},
{
date: "2016-05-04",
name: "王小虎",
address: "上海市普陀區金沙江路 1518 弄"
},
{
date: "2016-05-01",
name: "王小虎",
address: "上海市普陀區金沙江路 1518 弄"
},
{
date: "2016-05-08",
name: "王小虎",
address: "上海市普陀區金沙江路 1518 弄"
},
{
date: "2016-05-06",
name: "王小虎",
address: "上海市普陀區金沙江路 1518 弄"
},
{
date: "2016-05-07",
name: "王小虎",
address: "上海市普陀區金沙江路 1518 弄"
}
],
multipleSelection: [],
importUrl:'www.baidu.com',//后台接口config.admin_url+'rest/schedule/import/'
importHeaders:{
enctype:'multipart/form-data',
cityCode:''
},
name: 'import',
fileList: [],
withCredentials: true,
processing: false,
uploadTip:'點擊上傳',
importFlag:1,
dialogImportVisible:false,
errorResults:[]
};
},
methods: {
toggleSelection(rows) {
if (rows) {
rows.forEach(row => {
this.$refs.multipleTable.toggleRowSelection(row);
});
} else {
this.$refs.multipleTable.clearSelection();
}
},
handleSelectionChange(val) {
//復選框選擇回填函數,val返回一整行的數據
this.multipleSelection = val;
},
importData() {
this.importFlag = 1
this.fileList = []
this.uploadTip = '點擊上傳'
this.processing = false
this.dialogImportVisible = true
},
outportData() {
scheduleApi.downloadTemplate()
},
handlePreview(file) {
//可以通過 file.response 拿到服務端返回數據
},
handleRemove(file, fileList) {
//文件移除
},
beforeUpload(file){
//上傳前配置
this.importHeaders.cityCode='上海'//可以配置請求頭
let excelfileExtend = ".xls,.xlsx"//設置文件格式
let fileExtend = file.name.substring(file.name.lastIndexOf('.')).toLowerCase();
if (excelfileExtend.indexOf(fileExtend) <= -1) {
this.$message.error('文件格式錯誤')
return false
}
this.uploadTip = '正在處理中...'
this.processing = true
},
//上傳錯誤
uploadFail(err, file, fileList) {
this.uploadTip = '點擊上傳'
this.processing = false
this.$message.error(err)
},
//上傳成功
uploadSuccess(response, file, fileList) {
this.uploadTip = '點擊上傳'
this.processing = false
if (response.status === -1) {
this.errorResults = response.data
if (this.errorResults) {
this.importFlag = 2
} else {
this.dialogImportVisible = false
this.$message.error(response.errorMsg)
}
} else {
this.importFlag = 3
this.dialogImportVisible = false
this.$message.info('導入成功')
this.doSearch()
}
},
//下載模板
download() {
//調用后台模板方法,和導出類似
scheduleApi.downloadTemplate()
},
}
};
</script>
<style scoped>
.hide-dialog{
display:none;
}
</style>
5.js文件,調用接口
import axios from 'axios'
// 下載模板
export const downloadTemplate = function (scheduleType) {
axios.get('/rest/schedule/template', {
params: {
"scheduleType": scheduleType
},
responseType: 'arraybuffer'
}).then((response) => {
//創建一個blob對象,file的一種
let blob = new Blob([response.data], { type: 'application/x-xls' })
let link = document.createElement('a')
link.href = window.URL.createObjectURL(blob)
link.download = fileNames[scheduleType] + '_' + response.headers.datestr + '.xls'
link.click()
})
}
6.感謝看到這里,很實用的導入導出功能代碼,歡迎交流!
聖誕節快到了,祝大家Merry Christmas!