【vue3+xlxs+xlsx-style-vite】vue3项目中使用xlsx插件实现Excel表格的导出和解析，已实现

在vue3项目中使用xlsx插件实现Excel表格的导出和解析

1、xlsx插件包官方 xlsx插件包官方
2、FileReader官方文档：FileReader官方文档

安装xlsx和xlsx-style-vite、file-saver

npm install xlsx
npm install xlsx-style-vite
npm install file-saver

package.json中查看安装版本
在这里插入图片描述

在utils文件夹下新建excel.js

import { saveAs } from "file-saver";export function exportExcel(ids,filename,excelProps,excelList,dictOptions = {}
) {const newExcelProps = JSON.parse(JSON.stringify(excelProps));import("@/utils/export2Excel").then((excel) => {// 顺序表按值删除for (var i = newExcelProps.length - 1; i >= 0; i--) {if (newExcelProps[i].visible === false ||newExcelProps[i].field === "operation") {newExcelProps.splice(i, 1);}}const propLength = newExcelProps.length;const title = [filename];const tHeader = newExcelProps.map((item) => item[name]); // 表头// 需要过滤的导出表头const toRemove = ["操作"];const filterHeader = tHeader.filter((item) => !toRemove.includes(item));tHeader.length = 0;tHeader.push(...filterHeader);// 如果ids为空或者undefined导出默认的数据，否则筛选数据let fileData;if (ids === undefined || ids.length === 0) {fileData = excelList;} else if (ids && ids.length >= 0) {let arr = JSON.parse(JSON.stringify(excelList));let arrMap = new Map(arr.map((obj) => [obj.id, obj]));let resultArr = ids.map((id) => arrMap.get(id));fileData = resultArr;}fileData.forEach((item) => {newExcelProps.forEach((v) => {// 如果props 中type为dict 且 scopedSlots存在content 则会对每行导出数据进行下拉筛选if (v.type === "dict" && v.scopedSlots.content) {let dictField = v.dictField || ["dictValue", "dictLabel"];const filterData = dictOptions[v.field].filter((f) => item[v.field] == f[dictField[0]]);item[v.field] = !filterData.length ? "" : filterData[0][dictField[1]];}});});const data = Array.from(fileData, (v) =>newExcelProps.map(({ field }) => v[field]));//单元格值判空操作for (let i = 0; i < data.length; i++) {const item = data[i];for (let index = 0; index < item.length; index++) {item[index] =item[index] === "" ||item[index] === null ||item[index] === undefined? "": item[index];}}const merges = [`A1:${numToEng(propLength)}1`];excel.export_json_to_excel({title,header: tHeader,data,merges,filename,autoWidth: true,bookType: "xlsx",});});
}
// 转换英文字符
export function numToEng(num) {const A_Z = []for (let i = 65; i < 91; i++) {A_Z.push(String.fromCharCode(i))}return A_Z[num - 1]
}

在utils文件夹下新建export2Excel.js

/* eslint-disable */
// require("script-loader!file-saver");
import * as XLSX from "xlsx";
import * as XLSX_STYLE from "xlsx-style-vite"; // Vue3 + Vitefunction generateArray(table) {var out = [];var rows = table.querySelectorAll("tr");var ranges = [];for (var R = 0; R < rows.length; ++R) {var outRow = [];var row = rows[R];var columns = row.querySelectorAll("td");for (var C = 0; C < columns.length; ++C) {var cell = columns[C];var colspan = cell.getAttribute("colspan");var rowspan = cell.getAttribute("rowspan");var cellValue = cell.innerText;if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;//Skip rangesranges.forEach(function (range) {if (R >= range.s.r &&R <= range.e.r &&outRow.length >= range.s.c &&outRow.length <= range.e.c) {for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);}});//Handle Row Spanif (rowspan || colspan) {rowspan = rowspan || 1;colspan = colspan || 1;ranges.push({s: {r: R,c: outRow.length,},e: {r: R + rowspan - 1,c: outRow.length + colspan - 1,},});}//Handle ValueoutRow.push(cellValue !== "" ? cellValue : null);//Handle Colspanif (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null);}out.push(outRow);}return [out, ranges];
}function datenum(v, date1904) {if (date1904) v += 1462;var epoch = Date.parse(v);return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
}function sheet_from_array_of_arrays(data, opts) {var ws = {};var range = {s: {c: 10000000,r: 10000000,},e: {c: 0,r: 0,},};for (var R = 0; R != data.length; ++R) {for (var C = 0; C != data[R].length; ++C) {if (range.s.r > R) range.s.r = R;if (range.s.c > C) range.s.c = C;if (range.e.r < R) range.e.r = R;if (range.e.c < C) range.e.c = C;var cell = {v: data[R][C],};if (cell.v == null) continue;var cell_ref = XLSX_STYLE.utils.encode_cell({c: C,r: R,});if (typeof cell.v === "number") cell.t = "n";else if (typeof cell.v === "boolean") cell.t = "b";else if (cell.v instanceof Date) {cell.t = "n";cell.z = XLSX_STYLE.SSF._table[14];cell.v = datenum(cell.v);} else cell.t = "s";ws[cell_ref] = cell;}}if (range.s.c < 10000000) ws["!ref"] = XLSX_STYLE.utils.encode_range(range);return ws;
}function Workbook() {if (!(this instanceof Workbook)) return new Workbook();this.SheetNames = [];this.Sheets = {};
}function s2ab(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;
}export function export_table_to_excel(id) {var theTable = document.getElementById(id);var oo = generateArray(theTable);var ranges = oo[1];/* original data */var data = oo[0];var ws_name = "SheetJS";var wb = new Workbook(),ws = sheet_from_array_of_arrays(data);/* add ranges to worksheet */ws["!merges"] = ranges;/* add worksheet to workbook */wb.SheetNames.push(ws_name);wb.Sheets[ws_name] = ws;var wbout = XLSX_STYLE.write(wb, {bookType: "xlsx",bookSST: false,type: "binary",});saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream",}),"test.xlsx");
}// 生成器
function* generateHeaderString() {let index = 0;const letterString = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";while (true) {let str = "";let n = index;while (n >= 0) {str = letterString[n % 26] + str;n = Math.floor(n / 26) - 1;}yield str;index++;}
}// 迭代生成单元格表头数组
function generateHeaderArr(length) {const result = [];const generator = generateHeaderString();for (let i = 0; i < length; i++) {const nextString = generator.next().value;result.push(nextString);}return result;
}export function export_json_to_excel({title,multiHeader = [],header,data,filename,merges = [],autoWidth = true,bookType = "xlsx",
} = {}) {/* original data */filename = filename || "excel-list";data = [...data];//   data.unshift(header);data.unshift(title);for (let i = multiHeader.length - 1; i > -1; i--) {data.unshift(multiHeader[i]);}var ws_name = filename || "SheetJS";var wb = new Workbook(),ws = sheet_from_array_of_arrays(data);if (merges.length > 0) {if (!ws["!merges"]) ws["!merges"] = [];merges.forEach((item) => {ws["!merges"].push(XLSX_STYLE.utils.decode_range(item));});}if (autoWidth) {/*设置worksheet每列的最大宽度*/const colWidth = data.map((row) =>row.map((val) => {/*先判断是否为null/undefined*/if (val == null || val == "") {return {wch: 20,};} else if (val.toString().charCodeAt(0) > 255) {/*再判断是否为中文*/return {wch: val.toString().length * 10,};} else {return {wch: val.toString().length,};}}));/*以第一行为初始值*/let result = colWidth[0];for (let i = 1; i < colWidth.length; i++) {for (let j = 0; j < colWidth[i].length; j++) {if (result[0]["wch"] < colWidth[i][j]["wch"]) {result[0]["wch"] = colWidth[i][j]["wch"] + 5;} else {}}}result.push({ wch: 55 });ws["!cols"] = result;}/* add worksheet to workbook */wb.SheetNames.push(ws_name);wb.Sheets[ws_name] = ws;var dataInfo = wb.Sheets[wb.SheetNames[0]];//单元格外侧框线const borderAll = {top: {style: "thin",},bottom: {style: "thin",},left: {style: "thin",},right: {style: "thin",},};//给单元格加上边框let row = ["!ref", "!merges", "!cols"];for (var i in dataInfo) {if (row.indexOf(i) === -1) {dataInfo[i + ""].s = {border: borderAll,alignment: {horizontal: "center",vertical: "center",},};}}// 根据表头长度生成单元格列数组const arr = generateHeaderArr(header.length);// 表头加上样式arr.forEach((v) => {let v2 = v + "3";if (dataInfo.hasOwnProperty(v2)) {dataInfo[v2].s = {border: borderAll,font: {color: { rgb: "FFFFFF" },bold: false,italic: false,underline: false,},alignment: {horizontal: "center",vertical: "center",},fill: {fgColor: { rgb: "808080" },},};}});//设置主标题样式dataInfo["A1"].s = {font: {name: "微软雅黑",sz: 16,color: { rgb: "000000" },bold: false,italic: false,underline: false,},alignment: {horizontal: "center",vertical: "center",},};var wbout = XLSX_STYLE.write(wb, {bookType: bookType,bookSST: false,type: "binary",});saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream",}),`${filename}.${bookType}`);
}

在页面上使用

<script setup>
import Edit from "./components/Edit.vue";
import { onMounted, ref } from "vue";
import axios from "axios";
import { exportExcel } from "./utils/excel.js";
// TODO: 列表渲染
const list = ref([]);
const ids = ref([]);
const title = ref("测试导出");
const column = ref([{ field: "name" }, { field: "place" }]);
const getList = async () => {const res = await axios.get("/list");list.value = res.data;
};
const onDelete = async (id) => {await axios.delete("/del/&{id}");getList();
};
onMounted(() => getList());
// TODO: 删除功能const editRef = ref(null);
// TODO: 编辑功能
const onEdit = (row) => {editRef.value.open(row);
};
// 导出
const handleExport = () => {exportExcel(ids.value, title.value, column.value, list.value);
};
</script><template><div class="app"><el-button type="primary" @click="handleExport">导出</el-button><el-table :data="list"><el-table-column label="ID" prop="id"></el-table-column><el-table-column label="姓名" prop="name" width="150"></el-table-column><el-table-column label="籍贯" prop="place"></el-table-column><el-table-column label="操作" width="150"><template #default="{ row }"><el-button type="primary" link @click="onEdit(row)">编辑</el-button><el-button type="danger" link @click="onDelete(row.id)">删除</el-button></template></el-table-column></el-table></div><Edit ref="editRef" @onUpdate="getList" />
</template><style scoped>
.app {width: 980px;margin: 100px auto 0;
}
</style>