1.下载依赖npm i xlsx

2.在根目录utils新建mergeXlxs.js

/****/
import { utils, writeFile } from "xlsx";export default function mergeHeader(headers, data, datamerges, defaultTitle) {const ws = utils.book_new();utils.sheet_add_aoa(ws, headers);//这里要给表头预留位置utils.sheet_add_json(ws, data, {origin: "A" + (headers.length + 1),skipHeader: true,});ws["!merges"] = datamerges;const wb = { Sheets: { data: ws }, SheetNames: ["data"] };var title = defaultTitle || "列表";const wopts = { bookType: "xlsx", bookSST: false, type: "binary" };return writeFile(wb, `${title}.xlsx`, wopts);
}

3.页面使用

 先导入mergeXlxs.js

import mergeHeader from "@/utils/mergeXlxs";

写在方法里 

    const rows = [];// s开始：x      y       e结束：x     yvar datamerges = [// x轴从索引0开始到索引8合并，y轴从索引0开始到索引0结束{ s: { c: 0, r: 0 }, e: { c: 8, r: 0 } },{ s: { c: 0, r: 1 }, e: { c: 1, r: 1 } },{ s: { c: 2, r: 1 }, e: { c: 8, r: 1 } },{ s: { c: 0, r: 2 }, e: { c: 1, r: 2 } },{ s: { c: 2, r: 2 }, e: { c: 8, r: 2 } },// 收货单位(需方)    供货单位(供方){ s: { c: 0, r: 8 }, e: { c: 3, r: 8 } },{ s: { c: 5, r: 8 }, e: { c: 8, r: 8 } },{ s: { c: 0, r: 9 }, e: { c: 3, r: 9 } },{ s: { c: 5, r: 9 }, e: { c: 8, r: 9 } },{ s: { c: 0, r: 10 }, e: { c: 3, r: 10 } },{ s: { c: 5, r: 10 }, e: { c: 8, r: 10 } },];let headers = [];//每个合并的开始位置，也就是s的c位置要有数据headers.push(["2023年11月  材料汇总表",]);headers.push(["工程名称", "", "博望一期项目"]);headers.push(["供货单位", "", "广东沟泰建材贸易有限公司"]);headers.push(["序号", "名称", "厂家品牌", "规格型号", "供货日期", "供货单号", "单位", "数量", "备注"]);headers.push(["1", "钢筋", "天堂", "1kg", "2023-11-29", "DO20231128", "吨", "0", ""]);headers.push(["2", "钢筋", "天堂", "1kg", "2023-11-29", "DO20231128", "吨", "100", ""]);headers.push(["3", "钢筋", "天堂", "1kg", "2023-11-29", "DO20231128", "吨", "100", ""]);headers.push(["4", "合计", "", "", "", "", "", "200", ""]);headers.push(["收货单位(需方)：", "", "", "", "", "供货单位(供方):"]);headers.push(["授权代表(签字)：", "", "", "", "", "授权代表(签字):"]);headers.push(["日期：", "", "", "", "", "日期:"]);mergeHeader(headers, rows, datamerges, "测试合并导出");