fix: #666

src/views/able/excel.vue

@@ -1,6 +1,5 @@
 <script setup lang="ts">
-import { utils, writeFile } from "xlsx";
-
+import { utils, writeFile, SSF } from "xlsx";
 defineOptions({
  name: "Excel"
 });
@@ -48,6 +47,79 @@ const generateData = (
 const columns = generateColumns(10);
 const data = generateData(columns, 1000);
 
+const dnthresh = Date.UTC(1899, 11, 30, 0, 0, 0);
+function datenum(v) {
+ const epoch = v.getTime();
+ const res = (epoch - dnthresh) / (24 * 60 * 60 * 1000);
+ //这个地方-1 是为了兼容excel将1900年2月份当成闰年的错误，1900年是平年
+ return res < 60 ? res - 1 : res;
+}
+
+//将当前时间转化为世界时
+function local_to_utc(local) {
+ return new Date(
+ Date.UTC(
+ local.getFullYear(),
+ local.getMonth(),
+ local.getDate(),
+ local.getHours(),
+ local.getMinutes(),
+ local.getSeconds(),
+ local.getMilliseconds()
+ )
+ );
+}
+//重写xlsx的aoa_to_sheet方法，修复Date格式数据不准确的问题
+function aoa_to_sheet(data) {
+ const ws = {};
+ const range = { s: { c: 10000000, r: 10000000 }, e: { c: 0, r: 0 } };
+ for (let R = 0; R != data.length; ++R) {
+ if (!data[R]) continue;
+ if (!Array.isArray(data[R]))
+ throw new Error("aoa_to_sheet expects an array of arrays");
+ for (let C = 0; C != data[R].length; ++C) {
+ if (typeof data[R][C] === "undefined") continue;
+ let cell: Record<string, any> = { v: data[R][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;
+ if (
+ data[R][C] &&
+ typeof data[R][C] === "object" &&
+ !Array.isArray(data[R][C]) &&
+ !(data[R][C] instanceof Date)
+ )
+ cell = data[R][C];
+ else {
+ if (Array.isArray(cell.v)) {
+ cell.f = data[R][C][1];
+ cell.v = cell.v[0];
+ }
+ if (cell.v === null) {
+ if (cell.f) cell.t = "n";
+ else cell.t = "z";
+ } else if (typeof cell.v === "number") cell.t = "n";
+ else if (typeof cell.v === "boolean") cell.t = "b";
+ else if (cell.v instanceof Date) {
+ cell.z = SSF.get_table()[14];
+ cell.v = local_to_utc(cell.v);
+ cell.t = "n";
+ cell.v = datenum(cell.v);
+ cell.w = SSF.format(cell.z, cell.v);
+ } else {
+ cell.t = "s";
+ }
+ const cell_ref = utils.encode_cell({ c: C, r: R });
+ if (ws[cell_ref] && ws[cell_ref].z) cell.z = ws[cell_ref].z;
+ ws[cell_ref] = cell;
+ }
+ }
+ }
+ if (range.s.c < 10000000) ws["!ref"] = utils.encode_range(range);
+ return ws;
+}
+
 const exportExcel = () => {
  const res: string[][] = data.map((item: DataItem) => {
  const arr = [];
@@ -61,7 +133,7 @@ const exportExcel = () => {
  titleList.push(column.title);
  });
  res.unshift(titleList);
- const workSheet = utils.aoa_to_sheet(res);
+ const workSheet = aoa_to_sheet(res);
  const workBook = utils.book_new();
  utils.book_append_sheet(workBook, workSheet, "数据报表");
  writeFile(workBook, "tableV2.xlsx");