所需包

"xlsx": "^0.18.5"

页面导入包

import * as XLSX from 'xlsx';
import {genFileId,  UploadProps, UploadRawFile,ElTable } from 'element-plus';

页面

	<el-upload  accept=".xlsx" :on-change="changeExcel" :on-exceed="handleExceed" :limit="1" :auto-upload="false" :show-file-list="false"  ref="upload"><el-button type="primary" size="default">导入Excel</el-button></el-upload>//js
let tableData=ref([])
const upload = ref<InstanceType<typeof ElTable>>();
const handleExceed: UploadProps['onExceed'] = (files) => {upload.value!.clearFiles();const file = files[0] as UploadRawFile;file.uid = genFileId();upload.value!.handleStart(file);
};function changeExcel(e, fileList) {console.log('changeExcelProject---------->');if (fileList.length > 1) {fileList.splice(0, 1);}const files = e.raw;console.log('files------>', files);// 读取表格const fileReader = new FileReader();fileReader.onload = (ev) => {const workbook = XLSX.read(ev.target.result, {type: 'binary',});const wsname = workbook.SheetNames[0];const ws = XLSX.utils.sheet_to_json(workbook.Sheets[wsname], {defval: '',});console.log('ws=', ws); // 转换成json的数据//可以选择构建列let columnsproject = [];if (ws && ws.length > 0) {const obj = ws[0] as Object;for (const key in obj) {if (obj.hasOwnProperty(key)) {columnsproject.push({label: key,prop: key,});}}}tableDataproject.value = [...ws];fieldMap.set('姓名', 'name');fieldMap.set('年龄', 'age');fieldMap.set('性别', 'sex');let	tableDataArr = [...ws];let dataNew: any[] = [];for (let i = 0; i < tableDataArr.length; i++) {const item = tableDataArr[i];const obj: any = buildingObj(item);dataNew.push(obj);}tableData.value=dataNewconsole.error("tableData",tableData)};fileReader.readAsBinaryString(files);
}function buildingObj(item: object) {const obj = {};for (const [key, value] of fieldMap) {obj[value] = item[key];}return obj;
}