feat: 添加虚拟表格示例 (#1007)

* feat: 添加虚拟表格示例

src/views/table/high/excel/columns.tsx

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+import { ref } from "vue";
+import { utils, writeFile } from "xlsx";
+import { tableDataDrag } from "../data";
+import { clone } from "@pureadmin/utils";
+import { message } from "@/utils/message";
+
+export function useColumns() {
+  const dataList = ref(clone(tableDataDrag, true));
+
+  const columns: TableColumnList = [
+    {
+      label: "ID",
+      prop: "id"
+    },
+    {
+      label: "日期",
+      prop: "date"
+    },
+    {
+      label: "姓名",
+      prop: "name"
+    }
+  ];
+
+  const exportExcel = () => {
+    const res = dataList.value.map(item => {
+      const arr = [];
+      columns.forEach(column => {
+        arr.push(item[column.prop as string]);
+      });
+      return arr;
+    });
+    const titleList = [];
+    columns.forEach(column => {
+      titleList.push(column.label);
+    });
+    res.unshift(titleList);
+    const workSheet = utils.aoa_to_sheet(res);
+    const workBook = utils.book_new();
+    utils.book_append_sheet(workBook, workSheet, "数据报表");
+    writeFile(workBook, "pure-admin-table.xlsx");
+    message("导出成功", {
+      type: "success"
+    });
+  };
+
+  return {
+    columns,
+    dataList,
+    exportExcel
+  };
+}

src/views/table/high/excel/index.vue

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+<script setup lang="ts">
+import { useColumns } from "./columns";
+
+const { columns, dataList, exportExcel } = useColumns();
+</script>
+
+<template>
+  <div>
+    <el-button
+      type="primary"
+      class="mb-[20px] float-right"
+      @click="exportExcel"
+    >
+      导出
+    </el-button>
+    <pure-table row-key="id" border :data="dataList" :columns="columns" />
+  </div>
+</template>