DART/FLUTTER -如何在另一种方法中使用MysqlConnection的变量？

dependencies:
  mysql1: ^0.27.0

import 'package:mysql1/mysql1.dart';

void connectToDatabase() async {
  final settings = ConnectionSettings(
    host: 'your_mysql_host',
    port: 3306,
    user: 'your_mysql_user',
    password: 'your_mysql_password',
    db: 'your_database',
  );

  final conn = await MySqlConnection.connect(settings);

  // 在这里可以使用MysqlConnection的变量conn执行数据库操作
}

dependencies:
  flutter_mysql: ^0.11.1

import 'package:flutter_mysql/flutter_mysql.dart';

void connectToDatabase() {
  final conn = MysqlConnection(
    host: 'your_mysql_host',
    port: 3306,
    user: 'your_mysql_user',
    password: 'your_mysql_password',
    db: 'your_database',
  );

  conn.connect().then((value) {
    // 连接成功后可以使用MysqlConnection的变量conn执行数据库操作
  });
}