flutter dio Json 解析的两种方式类型转换

最新推荐文章于 2025-04-06 19:16:12 发布

computerclass

最新推荐文章于 2025-04-06 19:16:12 发布

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这段代码展示了三种不同的方式从HTTP响应中提取并处理JSON数据。第一种直接使用Result实体转换，第二种根据键值对取值，第三种是接收到异步信息后的直接JSON处理。原始JSON数据包含博客文章列表，包括文章ID、用户ID、标题、描述、内容等信息。

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void getHttp() async {
  var url = 'http://10.1.16.59:8080/blog';
  try {
    var response = await Dio().get(url);
    //print(response.statusCode);
    if (response.statusCode == 200) {
      var data = jsonDecode(response.toString());
      var ip = Result.fromJson(data); //1
      //print(ip.data.records.toString());
      var records = ip.data.records;
      for (var r in records) {
        print(r.content);
      }
    }
  } catch (e) {
    print(e);
  }
}

注意上面是直接Result 实体转换，下面是根据json中的键值对，取值。

Future getHomePageContent() async {
 
  try {
    Response response;
    Dio dio = new Dio();
    response = await dio.get("http://10.1.16.59:8080/blog");
    if (response.statusCode == 200) {
      //Map resdata = new Map<String, dynamic>.from(response.data);
      //List<dynamic> data = resdata["data"]["records"];
      //print(
      // "....................a..............." + data.indexOf(0).toString());
      //print("data:" + navigatorList.toString());
      return response.data;
    } else {
      throw Exception("...-");
    }
  } catch (e) {
    return print("error:" + e.toString());
  }
}

第三种方式为接收到异步信息后的直接Json处理

 getPost() async {
    String _url = NetConfig.getPostByPostId + "?postId=${widget.postId}";
    Map _result = await NetConfig.get(_url);
    var _post = _result['data'];
    print("111:" + _post['userId'].toString());
  }

原始json数据为：

{"code":200,"msg":"成功获取全部文章数据","data":{"records":[{"id":18,"userId":1,"title":"海洋","description":"http://10.1.16.59:8080/c04.jpg","content":"111","created":"2021-03-10T14:22:31","status":0},{"id":17,"userId":1,"title":"体育","description":"http://10.1.16.59:8080/c03.jpg","content":"111","created":"2021-03-10T14:22:27","status":0},{"id":16,"userId":2,"title":"食品","description":"http://10.1.16.59:8080/c02.jpg","content":"111","created":"2021-03-10T14:22:26","status":0},{"id":15,"userId":1,"title":"酒类","description":"http://10.1.16.59:8080/c01.jpg","content":"111","created":"2021-03-10T14:22:25","status":0},{"id":19,"userId":1,"title":"医学","description":"http://10.1.16.59:8080/c05.jpg","content":"111","created":"2021-03-10T14:22:23","status":0},{"id":20,"userId":1,"title":"教育","description":"http://10.1.16.59:8080/c06.jpg","content":"dsfsd","created":"2021-03-10T14:21:16","status":0},{"id":24,"userId":1,"title":"汽车","description":"http://10.1.16.59:8080/c10.jpg","content":"33","created":"2021-03-10T14:19:40","status":0},{"id":23,"userId":1,"title":"饮料","description":"http://10.1.16.59:8080/c09.jpg","content":"11111","created":"2021-03-10T13:39:19","status":0},{"id":22,"userId":1,"title":"室外","description":"http://10.1.16.59:8080/c08.jpg","content":"11111","created":"2021-03-10T13:39:14","status":0},{"id":21,"userId":1,"title":"工业","description":"http://10.1.16.59:8080/c07.jpg","content":"中国新闻","created":"2021-03-10T13:39:10","status":0}],"total":10,"size":15,"current":1,"orders":[],"searchCount":true,"pages":1}}