纯前端实现导入excel数据

准备工作 - 下载 xlsx

npm install xlsx

下面直接上代码👇

<template>
	<div>
		<input type="file" accept=".xlsx, .xls" @change="handleClick">
	</div>
</template>

<script lang='ts' setup>
import * as XLSX from 'xlsx'

const handleClick = async (e) => {
    const res = await readerData(e.target.files[0])
    console.log(res); // 获取的数据格式 { header: [], results: [{}] }
}

// 纯前端导入excel
const readerData = (rawFile) => {
    return new Promise((resolve, reject) => {
        // 创建一个文件读取的实例
        const reader = new FileReader()
        reader.onload = e => { // onload是加载完实例后执行（异步）
            const data = e.target.result
            const workbook = XLSX.read(data, { type: 'array' })
            // 获取一张表的表名
            const firstSheetName = workbook.SheetNames[0]
            // 根据表名拿到表里面的内容
            const worksheet = workbook.Sheets[firstSheetName]
            // 解析成json
            const results = XLSX.utils.sheet_to_json(worksheet)
            // 获取表头数据
            const header = getHeaderRow(worksheet)
            resolve({ header, results })
        }
        // 读取成一个Buffer格式文件
        reader.readAsArrayBuffer(rawFile)
    })
}

// 获取表头数据
const 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
}
</script>