如何在Dart中将字符串转换为utf8？ [英] How can I convert string to utf8 in Dart?

问题描述

我正在使用渡槽网络API框架来支持我的Flutter应用。在我的api后端中，我需要连接本地网络套接字服务。我的问题是我无法返回确切的字符串（在tr中）。 S o，如何在Dart中将字符串转换为utf8？

I am using aqueduct web api framework to support my flutter app. In my api backend I need to connect local network socket services. My problem is that I can't return the exact string (in tr). So, How can I convert string to utf8 in Dart?

示例：

@httpGet
Future<Response> getLogin() async {
  Socket.connect('192.168.1.22’, 1024).then((socket) async {
    socket.listen((data) {
      // Expected return is: 1:_:2:_:175997:_:NİYAZİ TOROS
      print(new String.fromCharCodes(data).trim());
      xResult = new String.fromCharCodes(data).trim();
      print("xResult: $xResult");
    }, onDone: () {
      print("Done");
      socket.destroy();
    });

    socket.write('Q101:_:49785:_:x\r\n');
  });

  return new Response.ok(xResult);
}

返回值不是TR-tr语言格式。

The return is not in TR-tr language format.

返回文本如下：
1：：2：：175997：_：NÝYAZÝTOROS

Return text looks like: 1::2::175997:_:NÝYAZÝ TOROS

正确的必须是：
1：：2：：175997：_：NİYAZİTOROS

Correct must be: 1::2::175997:_:NİYAZİ TOROS

更新：

1. xResult = new String.fromCharCodes （data）.trim（）;


2. print（xResult）;


3. responseBody = xResult.transform（utf8.decoder）;


4. print（responseBody） ;

1. xResult = new String.fromCharCodes(data).trim();
2. print(xResult);
3. responseBody = xResult.transform(utf8.decoder);
4. print(responseBody);

我可以打印 xResult 但尝试转换为UTF8后无法打印 responseBody

I can print the xResult but cannot print the responseBody after trying convert to UTF8

推荐答案

import 'dart:convert' show utf8;

var encoded = utf8.encode('Lorem ipsum dolor sit amet, consetetur...');
var decoded = utf8.decode(encoded);

另请参见 https://api.dartlang.org/stable/1.24.3/dart-convert/UTF8-constant.html

还有用于流的编码器和解码器

There are also encoder and decoder to be used with streams

File.openRead().transform(utf8.decoder).

另请参见 https://www.dartlang.org/articles/libraries/converters-and-codecs#converter

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