Flutter连接字符串解析插件connection_string_parser的使用

本文将介绍如何在Flutter项目中使用connection_string_parser插件来解析连接字符串。该插件可以将复杂的连接字符串解析为键值对的形式，便于后续处理。

示例

首先，我们需要在pubspec.yaml文件中添加依赖：

dependencies:
  connection_string_parser: ^0.1.0

然后运行flutter pub get以获取该库。

接下来，我们看一个具体的例子。假设我们有一个SQL Server的连接字符串：

final connectionString = "Provider=sqloledb;Data Source=myServerAddress;Initial Catalog=myDataBase;Integrated Security=SSPI;";

我们可以使用parseConnectionString函数将其解析为一个Map对象：

import 'package:connection_string_parser/connection_string_parser.dart';

void main() {
  final connectionString =
      "Provider=sqloledb;Data Source=myServerAddress;Initial Catalog=myDataBase;Integrated Security=SSPI;";
  
  // 解析连接字符串
  final map = parseConnectionString(connectionString);

  // 打印解析结果
  print(map);
}

输出结果如下：

{
  "Provider": "sqloledb",
  "Data Source": "myServerAddress",
  "Initial Catalog": "myDataBase",
  "Integrated Security": "SSPI"
}

通过上述代码，我们可以看到连接字符串被成功解析成了一个Map对象，并且每个键值对都对应着连接字符串中的一个参数。

完整示例Demo

以下是一个完整的示例Demo，展示了如何在Flutter项目中使用connection_string_parser插件来解析连接字符串。

main.dart

import 'package:flutter/material.dart';
import 'package:connection_string_parser/connection_string_parser.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("Connection String Parser Demo"),
        ),
        body: Center(
          child: ConnectionStringParserDemo(),
        ),
      ),
    );
  }
}

class ConnectionStringParserDemo extends StatefulWidget {
  [@override](/user/override)
  _ConnectionStringParserDemoState createState() => _ConnectionStringParserDemoState();
}

class _ConnectionStringParserDemoState extends State<ConnectionStringParserDemo> {
  Map<String, String> _parsedMap;

  void _parseConnectionString() {
    final connectionString =
        "Provider=sqloledb;Data Source=myServerAddress;Initial Catalog=myDataBase;Integrated Security=SSPI;";
    
    // 解析连接字符串
    setState(() {
      _parsedMap = parseConnectionString(connectionString);
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        ElevatedButton(
          onPressed: _parseConnectionString,
          child: Text("Parse Connection String"),
        ),
        SizedBox(height: 20),
        if (_parsedMap != null)
          Expanded(
            child: ListView.builder(
              itemCount: _parsedMap.length,
              itemBuilder: (context, index) {
                final key = _parsedMap.keys.elementAt(index);
                final value = _parsedMap[key];
                return ListTile(
                  title: Text(key),
                  subtitle: Text(value),
                );
              },
            ),
          )
      ],
    );
  }
}