Vue + Element 實現匯入匯出Excel
1、首先搭建Vue 專案(具體可參考以前文章,不再詳述:https://blog.csdn.net/qq_42540989/article/details/89853923)
2、引入Element(你可以引入整個 Element,或是根據需要僅引入部分元件。我們先介紹如何引入完整的 Element。)
//在main.js中引用
import ElementUi from 'element-ui'
import 'element-ui/lib/theme-chalk/index.css';
Vue.use(ElementUi)
3、 在components 資料夾中新建一個Vue檔案
// excal.vue
<template>
<div class="hello">
<h1>{{ msg }}</h1>
<el-row>
<el-button>預設按鈕</el-button>
<el-button type="primary">主要按鈕</el-button>
<el-button type="success">成功按鈕</el-button>
</el-row>
</div>
</template>
<script>
export default {
data() {
return {
imageUrl: '',
msg:'hello,Element'
};
},
methods: {
}
}
</script>
<style scoped>
</style>
// index.js
import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import excal from '@/components/excal'
Vue.use(Router)
export default new Router({
routes: [
{
path: '/',
name: 'HelloWorld',
component: HelloWorld
},
{
path: '/enter/',
name: 'excal',
component: excal
}
]
})
3、 執行專案
// 執行
npm run dev
4、訪問 http://localhost:8080/#/enter 檢視 element-ui 是否成功引入
5、匯入匯出 - - 開始引入工具庫
// file-saver xlsx script-loader
cnpm install -S file-saver xlsx
cnpm install -D script-loader
6、匯入程式碼: https://github.com/MrBaiLiJie/importExcal
// https://github.com/MrBaiLiJie/importExcal
<template>
<div class="hello">
<h1>{{ msg }}</h1>
<!-- <el-row>
<el-button>預設按鈕</el-button>
<el-button type="primary">主要按鈕</el-button>
<el-button type="success">成功按鈕</el-button>
</el-row>-->
<el-upload
class="upload-demo"
action
:on-change="handleChange"
:on-exceed="handleExceed"
:on-remove="handleRemove"
:before-remove="beforeRemove"
:file-list="fileListUpload"
:limit="limitUpload"
accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel"
:auto-upload="false"
>
<el-button size="small" type="primary">點選上傳</el-button>
<div slot="tip" class="el-upload__tip">只 能 上 傳 xlsx / xls 文 件</div>
</el-upload>
</div>
</template>
<script>
export default {
data() {
return {
imageUrl: "",
msg: "hello,Element",
limitUpload: 1,
fileTemp: "",
file:"",
fileListUpload: []
};
},
methods: {
handleChange(file,fileList){
// console.log(file)
this.fileTemp = file.raw;
if(this.fileTemp){
// console.log(this.fileTemp.type)
if(this.fileTemp.type == "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" ||
this.fileTemp.type == "application/vnd.ms-excel"){
this.importfxx(this.fileTemp)
}else{
this.$message({
type:"warning",
message:"附件格式錯誤,請刪除後重新上傳!"
});
}
}
},
importfxx(obj) {
console.log(obj)
let _this = this;
// 通過DOM取檔案資料
this.file = obj;
var rABS = false; //是否將檔案讀取為二進位制字串
var f = this.file;
var reader = new FileReader();
//if (!FileReader.prototype.readAsBinaryString) {
FileReader.prototype.readAsBinaryString = function(f) {
var binary = "";
var rABS = false; //是否將檔案讀取為二進位制字串
var pt = this;
var wb; //讀取完成的資料
var outdata;
var reader = new FileReader();
reader.onload = function(e) {
var bytes = new Uint8Array(reader.result);
var length = bytes.byteLength;
for (var i = 0; i < length; i++) {
binary += String.fromCharCode(bytes[i]);
}
var XLSX = require("xlsx");
if (rABS) {
wb = XLSX.read(btoa(fixdata(binary)), {
//手動轉化
type: "base64"
});
} else {
wb = XLSX.read(binary, {
type: "binary"
});
}
outdata = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]); //outdata就是你想要的東西
this.da = [...outdata];
let arr = [];
this.da.map(v => {
let obj = {};
obj.code = v["裝置ID"];
obj.type = v["裝置型號"];
arr.push(obj);
});
return arr;
};
reader.readAsArrayBuffer(f);
};
if (rABS) {
reader.readAsArrayBuffer(f);
} else {
reader.readAsBinaryString(f);
}
},
beforeRemove(file, fileList) {
return this.$confirm(`確定移除 ${file.name}?`);
},
handleRemove(file, fileList) {
// console.log(file)
this.fileTemp = null;
},
handleExceed(files, fileList) {
this.$message.warning(
`當前限制選擇1個檔案,本次選擇了 ${
files.length
} 個檔案,共選擇了 ${files.length + fileList.length} 個檔案`
);
},
}
};
</script>
<style scoped>
</style>
6、 補充
xls 是一個特有的二進位制格式,其核心結構是複合文件型別的結構,而 xlsx 的核心結構是 XML 型別的結構,採用的是基於 XML 的壓縮方式,使其佔用的空間更小。xlsx 中最後一個 x 的意義就在於此。
7、匯出步驟
// 步驟
1、引入js檔案
在src資料夾下新建excal資料夾,引入兩個js檔案 Blob.js Export2Excel.js
// js檔案 已上傳至github
地址:https://github.com/MrBaiLiJie/importExcal/tree/master/src/excal
2、在main.js引入
import Blob from './excal/Blob.js'
import Export2Excel from './excal/Export2Excel.js'
3、開啟Export2Excel.js
require('script-loader!file-saver');
require('script-loader!./Blob');
require('script-loader!xlsx/dist/xlsx.core.min');
這幾個檔案不支援import引入,所以需要script-loader來將他們掛載到全域性環境下。
8、匯出程式碼:https://github.com/MrBaiLiJie/importExcal
// https://github.com/MrBaiLiJie/importExcal
<template>
<div class="hello">
<h1>{{ msg }}</h1>
<!-- <el-row>
<el-button>預設按鈕</el-button>
<el-button type="primary">主要按鈕</el-button>
<el-button type="success">成功按鈕</el-button>
</el-row>-->
<!-- 匯出 -->
<el-button @click="outExe">匯出</el-button>
</div>
</template>
<script>
export default {
data() {
return {
imageUrl: "",
msg: "hello,Element",
limitUpload: 1,
fileTemp: "",
file: "",
fileListUpload: [],
excelData:[],
dataList:[{userId:1,name:'小白',age:'18',status:"上學"},{userId:2,name:'小黑',age:'22',status:"待業"},{userId:3,name:'小紅',age:'28',status:"就業"}]
};
},
methods: {
// 匯出
outExe() {
this.$confirm("此操作將匯出excel檔案, 是否繼續?", "提示", {
confirmButtonText: "確定",
cancelButtonText: "取消",
type: "warning"
})
.then(() => {
this.excelData = this.dataList; //你要匯出的資料list。
this.export2Excel();
})
.catch(() => {});
},
export2Excel() {
var that = this;
require.ensure([], () => {
const { export_json_to_excel } = require("../excal/Export2Excel"); //這裡必須使用絕對路徑,根據自己的命名和路徑
const tHeader = [
"userId",
"name",
"age",
"status",
]; // 匯出的表頭名
const filterVal = [
"userId",
"name",
"age",
"status",
]; // 匯出的表頭欄位名
const list = that.excelData;
// that.excelData為傳入的資料
const data = that.formatJson(filterVal, list);
export_json_to_excel(tHeader, data, `測試匯出excel`); // 匯出的表格名稱,根據需要自己命名
// tHeader為匯出Excel表頭名稱,`xxxxxx`即為匯出Excel名稱
});
},
formatJson(filterVal, jsonData) {
return jsonData.map(v => filterVal.map(j => v[j]));
}
}
};
</script>
<style scoped>
</style>
9、參考文獻
element-ui官方文件:https://element.eleme.io/#/zh-CN/component/upload
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