Flutter:如何显示同一个表中的所有列

import 'package:flutter/material.dart';
import 'package:sqflite/sqflite.dart';
import 'package:path/path.dart';

class PersonModel {
  final int id;
  final String name;
  final int age;

  PersonModel({this.id, this.name, this.age});
}

class PersonListScreen extends StatefulWidget {
  @override
  _PersonListScreenState createState() => _PersonListScreenState();
}

class _PersonListScreenState extends State<PersonListScreen> {
  Future<List<PersonModel>> _getPersons() async {
    // 连接到数据库
    Database database = await openDatabase(
      join(await getDatabasesPath(), 'my_database.db'),
    );

    // 查询所有人员信息
    List<Map<String, dynamic>> personMaps = await database.query('Person');

    // 将查询结果转换为PersonModel对象列表
    return List.generate(personMaps.length, (index) {
      return PersonModel(
        id: personMaps[index]['id'],
        name: personMaps[index]['name'],
        age: personMaps[index]['age'],
      );
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Person List'),
      ),
      body: FutureBuilder(
        future: _getPersons(),
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) {
            return Center(child: CircularProgressIndicator());
          } else if (snapshot.hasError) {
            return Center(child: Text('Error: ${snapshot.error}'));
          } else {
            List<PersonModel> persons = snapshot.data;
            return ListView.builder(
              itemCount: persons.length,
              itemBuilder: (context, index) {
                return ListTile(
                  title: Text(persons[index].name),
                  subtitle: Text('Age: ${persons[index].age}'),
                );
              },
            );
          }
        },
      ),
    );
  }
}