flutter datatable如何在列之间添加垂直边框

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter DataTable'),
        ),
        body: Center(
          child: DataTable(
            decoration: BoxDecoration(
              border: Border.all(
                color: Colors.black,
                width: 1.0,
              ),
            ),
            columns: [
              DataColumn(label: Text('Column 1')),
              DataColumn(label: Text('Column 2')),
              DataColumn(label: Text('Column 3')),
            ],
            rows: [
              DataRow(cells: [
                DataCell(Text('Row 1, Cell 1')),
                DataCell(Text('Row 1, Cell 2')),
                DataCell(Text('Row 1, Cell 3')),
              ]),
              DataRow(cells: [
                DataCell(Text('Row 2, Cell 1')),
                DataCell(Text('Row 2, Cell 2')),
                DataCell(Text('Row 2, Cell 3')),
              ]),
              DataRow(cells: [
                DataCell(Text('Row 3, Cell 1')),
                DataCell(Text('Row 3, Cell 2')),
                DataCell(Text('Row 3, Cell 3')),
              ]),
            ],
          ),
        ),
      ),
    );
  }
}