vue中或者react中的excel导入和导出

excel导入和导出是后台管理系统常见的功能。

       当我们把信息化系统给用户使用时,用户经常需要把以前在excel里录入的数据导入的信息化系统里,这样为用户提供了很大的方便。

        在用户使用信息化系统时,也需要把网页表格里的数据导出到excel里,方便进行打印,排版等等。

一、安装依赖的模块:

1、file-saver 用于文件操作

2、xlsx用于excel文件处

npm i xlsx@0.17.0 -S

npm i file-saver@2.0.5 -S

二、导出功能实现

在自己的项目中新建一个js文件模块。放入如下代码:

1、使用dom元素导出
// 1、根据dom元素导出成excel文件:

// 自动分析dom元素导出excel
// 参数:
// table:表格的dom元素对象
// filename:导出的文件名(不用写扩展名)
export function excelExport(table, filename) {
    // workbook,
    const wb = XLSX.utils.table_to_book(table);
    console.log("wb", wb);

    /* Export to file (start a download) */
    const defaultCellStyle = {
        font: { name: 'Verdana', sz: 13, color: 'FF00FF88' },
        fill: { fgColor: { rgb: 'FFFFAA00' } },
    }
    const wopts = {
        bookType: 'xlsx',
        bookSST: false,
        type: 'binary',
        cellStyle: true,
        defaultCellStyle: defaultCellStyle,
        showGridLines: false,
    }
    const wbout = XLSX.write(wb, wopts)
    const blob = new Blob([s2ab(wbout)], { type: 'application/octet-stream' })
    saveAs(blob, filename + '.xlsx')
}

function s2ab(s) {
    console.log("s", 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;
}

调用示例:

excelExport(document.getElementById("t2"), "student");// t2是一个table标签的id。其实是包含表格标签的id,会自动分析的。
2、使用json数组数据导出

// 2、根据json数据(数组)导出成excel文件:

// 参数:
// data:json数组
// headers:excel的表头
// filename:导出的文件名(不用写扩展名)
export function excelExportUseJson(data, headers, filename) {
    // 使用深克隆不影响原table数据的展示
    const json = cloneDeep(data)

    json.forEach(item => {
        for (let key in item) {
            if (headers.hasOwnProperty(key)) {
                item[headers[key]] = item[key]
            }
            delete item[key]
        }
    })

    // excel 对象
    const wb = XLSX.utils.book_new()

    // 创建sheet
    const ws = XLSX.utils.json_to_sheet(json, { header: Object.values(headers) })
    // excel 添加sheet名称
    wb.SheetNames.push(filename)
    // excel 添加sheet
    wb.Sheets[filename] = ws

    const defaultCellStyle = {
        font: { name: 'Verdana', sz: 13, color: 'FF00FF88' },
        fill: { fgColor: { rgb: 'FFFFAA00' } },
    }
    const wopts = {
        bookType: 'xlsx',
        bookSST: false,
        type: 'binary',
        cellStyle: true,
        defaultCellStyle: defaultCellStyle,
        showGridLines: false,
    }
    const wbout = XLSX.write(wb, wopts)
    const blob = new Blob([s2ab(wbout)], { type: 'application/octet-stream' })
    saveAs(blob, filename + '.xlsx')
}


function cloneDeep(obj) {
    if (typeof obj !== 'object' || obj === null) {
        return obj;
    }

    let clonedObj = Array.isArray(obj) ? [] : {};

    for (let key in obj) {
        if (obj.hasOwnProperty(key)) {
            clonedObj[key] = cloneDeep(obj[key]);
        }
    }

    return clonedObj;
}

调用示例:
 

调用示例:

const books = [

​    {

​      id:"878911",

​      name:"三国演义"

​    },     

​    {

​      id:"878912",

​      name:"西游记"

​    }

]

excelExportUseJson(books,{id:"编号",name:"书名"},"student02");

三、导入功能实现


// 1、导入成dom元素:

// 参数:
// data:文件对象(用<input type=file /> 选择到file对象
// domId:导入的excel显示的容器

export function httpRequestToHTML(data, domId) {

    const file = data
    const types = file.name.split('.')[1]
    const fileType = ['xlsx', 'xlc', 'xlm', 'xls', 'xlt'].some(
        (item) => item === types
    )
    if (!fileType) {
        this.$message.error('格式错误!请重新选择')
        return
    }


    const reader = new FileReader()
    reader.readAsArrayBuffer(file, 'utf-8');
    return new Promise(function (resolve, reject) {

        reader.onloadend = function (e) {
            const data = e.target.result
            console.log('data', data)
            const wb = XLSX.read(data, {
                type: 'buffer'
            })

            const ws = wb.Sheets[wb.SheetNames[0]]
            console.log('ws', ws)

            const htmlStr = XLSX.utils.sheet_to_html(ws)
            resolve(htmlStr); 

        }

    });
}


// 2、导入成json数据。
// 参数:
// data:文件对象(用<input type=file /> 选择到file对象

export function httpRequestToJSON(data) {

    const file = data
    const types = file.name.split('.')[1]
    const fileType = ['xlsx', 'xlc', 'xlm', 'xls', 'xlt'].some(
        (item) => item === types
    )
    if (!fileType) {
        this.$message.error('格式错误!请重新选择')
        return
    }


    const reader = new FileReader()
    reader.readAsArrayBuffer(file, 'utf-8');

    return new Promise(function (resolve, reject) {

        reader.onloadend = function (e) {
            const data = e.target.result
            console.log('data', data)
            const wb = XLSX.read(data, {
                type: 'buffer'
            })

            const ws = wb.Sheets[wb.SheetNames[0]]
            
            let arr = XLSX.utils.sheet_to_json(ws);

            resolve(arr);
        }
        
    });
}


// 封装:把excel转成html或者json。
// 参数:
//    file:(excel)文件对象
//    outtype:是导出的类型(取值:html,json)

// 调用示例:
// excelTo(文件对象,"html")
// excelTo(文件对象,"json")
export function excelImport(file,outtype="json") {

    const types = file.name.split('.')[1]
    const fileType = ['xlsx', 'xlc', 'xlm', 'xls', 'xlt'].some(
        (item) => item === types
    )
    if (!fileType) {
        this.$message.error('格式错误!请重新选择')
        return
    }

    const reader = new FileReader()
    reader.readAsArrayBuffer(file, 'utf-8');

    return new Promise(function (resolve, reject) {

        reader.onloadend = function (e) {
            const data = e.target.result
            console.log('data', data)
            const wb = XLSX.read(data, {
                type: 'buffer'
            })

            const ws = wb.Sheets[wb.SheetNames[0]];
            let result = "";
            switch(outtype.toLocaleLowerCase()){
                case "html":result = XLSX.utils.sheet_to_html(ws);break;
                case "json":result = XLSX.utils.sheet_to_json(ws);break;
                default:this.$message.error('输出类型错误,只能取值为 html或者json')
            }
            resolve(result);
        }
    });
}

调用示例:

const importFn=(e)=>{
    if(e.target.files && e.target.files.length>0){
        httpRequestToHTML(e.target.files[0],"TableContainer")
    }
}


<input type="file" onChange={importFn} />
<div id="TableContainer">

</div>

四、如果想看完整代码的,在下面:

1、导入导出的工具库:excelUtils.js
// 此工具库是:excel的导入和导出

import * as XLSX from 'xlsx';
// import * as fs from 'file-saver';
import { saveAs } from "file-saver"

// 一、excel的导出:
// 1、根据dom元素导出成excel文件:

// 自动分析dom元素导出excel
// 参数:
// table:表格的dom元素对象
// filename:导出的文件名(不用写扩展名)
export function excelExport(table, filename) {
    // workbook,
    const wb = XLSX.utils.table_to_book(table);
    console.log("wb", wb);

    /* Export to file (start a download) */
    const defaultCellStyle = {
        font: { name: 'Verdana', sz: 13, color: 'FF00FF88' },
        fill: { fgColor: { rgb: 'FFFFAA00' } },
    }
    const wopts = {
        bookType: 'xlsx',
        bookSST: false,
        type: 'binary',
        cellStyle: true,
        defaultCellStyle: defaultCellStyle,
        showGridLines: false,
    }
    const wbout = XLSX.write(wb, wopts)
    const blob = new Blob([s2ab(wbout)], { type: 'application/octet-stream' })
    saveAs(blob, filename + '.xlsx')
}

function s2ab(s) {
    console.log("s", 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;
}

// 2、根据json数据(数组)导出成excel文件:

// 参数:
// data:json数组
// headers:excel的表头
// filename:导出的文件名(不用写扩展名)
export function excelExportUseJson(data, headers, filename) {
    // 使用深克隆不影响原table数据的展示
    const json = cloneDeep(data)

    json.forEach(item => {
        for (let key in item) {
            if (headers.hasOwnProperty(key)) {
                item[headers[key]] = item[key]
            }
            delete item[key]
        }
    })

    // excel 对象
    const wb = XLSX.utils.book_new()

    // 创建sheet
    const ws = XLSX.utils.json_to_sheet(json, { header: Object.values(headers) })
    // excel 添加sheet名称
    wb.SheetNames.push(filename)
    // excel 添加sheet
    wb.Sheets[filename] = ws

    const defaultCellStyle = {
        font: { name: 'Verdana', sz: 13, color: 'FF00FF88' },
        fill: { fgColor: { rgb: 'FFFFAA00' } },
    }
    const wopts = {
        bookType: 'xlsx',
        bookSST: false,
        type: 'binary',
        cellStyle: true,
        defaultCellStyle: defaultCellStyle,
        showGridLines: false,
    }
    const wbout = XLSX.write(wb, wopts)
    const blob = new Blob([s2ab(wbout)], { type: 'application/octet-stream' })
    saveAs(blob, filename + '.xlsx')
}


function cloneDeep(obj) {
    if (typeof obj !== 'object' || obj === null) {
        return obj;
    }

    let clonedObj = Array.isArray(obj) ? [] : {};

    for (let key in obj) {
        if (obj.hasOwnProperty(key)) {
            clonedObj[key] = cloneDeep(obj[key]);
        }
    }

    return clonedObj;
}

// 二、从excel文件导入到项目里。

// 1、导入成dom元素:

// 参数:
// data:文件对象(用<input type=file /> 选择到file对象
// domId:导入的excel显示的容器

export function httpRequestToHTML(data, domId) {

    const file = data
    const types = file.name.split('.')[1]
    const fileType = ['xlsx', 'xlc', 'xlm', 'xls', 'xlt'].some(
        (item) => item === types
    )
    if (!fileType) {
        this.$message.error('格式错误!请重新选择')
        return
    }


    const reader = new FileReader()
    reader.readAsArrayBuffer(file, 'utf-8');
    return new Promise(function (resolve, reject) {

        reader.onloadend = function (e) {
            const data = e.target.result
            console.log('data', data)
            const wb = XLSX.read(data, {
                type: 'buffer'
            })

            const ws = wb.Sheets[wb.SheetNames[0]]
            console.log('ws', ws)

            const htmlStr = XLSX.utils.sheet_to_html(ws)
            resolve(htmlStr); 

        }

    });
}


// 2、导入成json数据。
// 参数:
// data:文件对象(用<input type=file /> 选择到file对象

export function httpRequestToJSON(data) {

    const file = data
    const types = file.name.split('.')[1]
    const fileType = ['xlsx', 'xlc', 'xlm', 'xls', 'xlt'].some(
        (item) => item === types
    )
    if (!fileType) {
        this.$message.error('格式错误!请重新选择')
        return
    }


    const reader = new FileReader()
    reader.readAsArrayBuffer(file, 'utf-8');

    return new Promise(function (resolve, reject) {

        reader.onloadend = function (e) {
            const data = e.target.result
            console.log('data', data)
            const wb = XLSX.read(data, {
                type: 'buffer'
            })

            const ws = wb.Sheets[wb.SheetNames[0]]
            
            let arr = XLSX.utils.sheet_to_json(ws);

            resolve(arr);
        }
        
    });
}


// 封装:把excel转成html或者json。
// 参数:
//    file:(excel)文件对象
//    outtype:是导出的类型(取值:html,json)

// 调用示例:
// excelTo(文件对象,"html")
// excelTo(文件对象,"json")
export function excelImport(file,outtype="json") {

    const types = file.name.split('.')[1]
    const fileType = ['xlsx', 'xlc', 'xlm', 'xls', 'xlt'].some(
        (item) => item === types
    )
    if (!fileType) {
        this.$message.error('格式错误!请重新选择')
        return
    }

    const reader = new FileReader()
    reader.readAsArrayBuffer(file, 'utf-8');

    return new Promise(function (resolve, reject) {

        reader.onloadend = function (e) {
            const data = e.target.result
            console.log('data', data)
            const wb = XLSX.read(data, {
                type: 'buffer'
            })

            const ws = wb.Sheets[wb.SheetNames[0]];
            let result = "";
            switch(outtype.toLocaleLowerCase()){
                case "html":result = XLSX.utils.sheet_to_html(ws);break;
                case "json":result = XLSX.utils.sheet_to_json(ws);break;
                default:this.$message.error('输出类型错误,只能取值为 html或者json')
            }
            resolve(result);
        }
    });
}
2、组件代码:
<template>
    <el-button @click="drawer = true" v-if="crud.charAt(0) === '1'">添加轮播图</el-button>
    <el-button @click="toExcel01">excel导出(用dom元素)</el-button>
    <el-button @click="toExcel02">excel导出(用json数组)</el-button>
     <!-- <el-button @click="fromExcel">excel导入</el-button> -->
    <!-- <input type="file" @change="fromExcel" /> -->
    <el-upload ref="upload" class="upload-demo" :limit="1" :on-change="changeFn" :on-exceed="handleExceed" :auto-upload="false" :show-file-list="false">
        <template #trigger>
            <el-button type="primary">excel导入</el-button>
        </template>
    </el-upload>
    <el-button @click="batchSave">批量提交</el-button>
    <el-button @click="clearAll">清空轮播图数据</el-button>
    <el-divider />

    <el-table ref="table" id="table01" :data="bannerList" height="600px" style="width: 100%">
        <el-table-column prop="bannerid" label="编号" width="180" />
        <el-table-column label="图片" width="180">
            <template #default="scope">
                <img class="img" :src="scope.row.img" />
            </template>
        </el-table-column>
        <el-table-column label="是否启用" v-if="crud.charAt(2) === '1'">
            <template #default="scope">
                <el-switch v-model="scope.row.flag" />
            </template>
        </el-table-column>
        <el-table-column label="跳转连接">
            <template #default="scope">
                <el-link :href="scope.row.link" type="primary" target="_blank">跳转连接</el-link>
            </template>
        </el-table-column>
        <el-table-column prop="alt" label="图片提示" />
        <el-table-column label="操作" v-if="crud.charAt(2) === '1' || crud.charAt(3) === '1'">
            <template #default="scope">
                <el-button type="danger" v-if="crud.charAt(3) === '1'" >删除</el-button>
                <el-button type="danger" v-if="crud.charAt(2) === '1'">修改</el-button>
            </template>
        </el-table-column>
    </el-table>
    <el-drawer v-model="drawer" title="添加轮播图" direction="rtl" :before-close="handleClose">
        <AddBannerVue ref="addBannerRef" @ok="okHandle" @cancel="closeDrawer"></AddBannerVue>
    </el-drawer>
    <hr />
    <div id="container"></div>
</template>
  
<script lang="ts" setup>
import { useRoute } from "vue-router";
import { getBannerApi, addBannerApi,clearBannerApi } from "@/api/banner";
import { onMounted, reactive, ref } from "vue";
import { ElMessageBox } from 'element-plus'
import type { UploadInstance, UploadProps, UploadRawFile,UploadFile } from 'element-plus'
import AddBannerVue from "./AddBanner.vue";
import type { IBanner } from "@/myTypes"
import { excelExport, excelExportUseJson, excelImport } from "@/utils/excelUtils";

const $route = useRoute();//this.$route

const crud: string = $route.meta.crud as string;


const bannerList = reactive<Array<IBanner>>([]);

// 清空轮播图

const clearAll=()=>{
    clearBannerApi().then(res=>{
        if(res.data.code==="200"){
            ElMessageBox.alert("清空成功", "提示", {
                confirmButtonText: "确定",
                callback: () => {
                    getBannerList();
                }
            });
        }
    }).catch(err=>{
        console.log("清空失败",err);
    })
}

// 获取轮播图的数据
function getBannerList() {
    getBannerApi().then(res => {
        if (res.data.code === "200") {
            bannerList.length = 0;
            bannerList.push(...res.data.data);
        }
    }).catch(err => {
        console.log("获取轮播图失败,err", err);
    })
}

// 在初次渲染完毕后,获取轮播图数据
// onMounted(()=>getBannerList());
getBannerList();


// 添加相关:
// 
const drawer = ref(false);

function okHandle() {
    closeDrawer();
    getBannerList();
}

// 关闭抽屉
const closeDrawer = () => {
    drawer.value = false;
}

const addBannerRef = ref();

const handleClose = (done: () => void) => {
    ElMessageBox.confirm('亲,您真的要关闭吗?')
        .then(() => {
            console.log("点了确定");
            addBannerRef.value.clearData();
            done();
        })
        .catch(() => {
            // catch error
            console.log("点了取消");
        })
}

onMounted(() => console.log("父组件:mounted"))

const toExcel01 = () => {
    excelExport(document.getElementById("table01"), "banners");
}

const toExcel02 = () => {
    // const arr = bannerList.map(item => ({
    //     bannerid: item.bannerid,
    //     img: item.img,
    //     flag: item.flag ? "是" : "否"
    // }))
    // excelExportUseJson(arr, {
    //     bannerid: "编号",
    //     img: "图片",
    //     flag: "是否启用"
    // }, "bannerList");

    excelExportUseJson(bannerList, {
        bannerid: "编号",
        img: "图片",
        flag: "是否启用",
        link: "跳转连接",
        alt: "图片提示"
    }, "bannerList");
}

// 从excel文件中导入
const fromExcel = (e: any) => {

    if (e.target.files && e.target.files.length > 0) {
        excelImport(e.target.files[0],)
            .then((arr: any) => {
                bannerList.length = 0;
                arr.forEach((item: any) => {
                    bannerList.push({
                        bannerid: item["编号"],
                        img: item["图片"],
                        flag: item["是否启用"],
                        link: item["跳转连接"],
                        alt: item["图片提示"]
                    });
                })
            })
    }
}

function batchSave() {
    let count = 0;
    bannerList.forEach((item: any) => {
        addBannerApi(item).then(() => {
            console.log(`添加成功了${++count}条`);
        })
    })
}


const upload = ref<UploadInstance>();

const handleExceed: UploadProps['onExceed'] = (files) => {

    upload.value!.clearFiles()

    const file = files[0] as UploadRawFile

    upload.value!.handleStart(file);
}

const changeFn=(file:UploadFile)=>{
    console.log("excelImport:file",file);

    excelImport(file.raw as File)
        .then((arr: any) => {
            bannerList.length = 0;
            arr.forEach((item: any) => {
                bannerList.push({
                    bannerid: item["编号"],
                    img: item["图片"],
                    flag: item["是否启用"],
                    link: item["跳转连接"],
                    alt: item["图片提示"]
                });
            })
        })

}

</script>

<style lang="scss" scoped>
.img {
    width: 100%;
    height: 100px;
}
</style>

文章来源地址https://www.uudwc.com/A/mNdqa/

原文地址:https://blog.csdn.net/jiang7701037/article/details/133283777

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