效果： 

代码：

<a-table
    :dataSource="dataSource"
    :columns="columns"
    :pagination="pagination"
    @change="handleTableChange"
    :scroll="{ x: '100%', y: 600 }"
  >
</a-table>

export default defineComponent({
  setup() {
    const current = ref(1);
    const pageSize = ref(10);
    const pagination = computed(() => ({
      current: current.value,
      pageSize: pageSize.value,
      total: 30,
      showTotal: (total) => `共 ${total} 条`,
      pageSizeOptions: ["5", "10", "15"],
      showSizeChanger: true,
    }));
    const handleTableChange = (pag, filters, sorter) => {
      current.value = pag.current;
      pageSize.value = pag.pageSize;
    };

    return {
      pagination,
      handleTableChange,
    };
  },
});