android - java对象的JSON转换异常

Question

我遇到了 json 转换异常。当我将 json 转换为 java 对象时。

这是我的json

[  
   {  
      "PrefrenceId":"228f176d-d224-32d7-9bb5-6287a06a68e8",
      "UserId":"327e6c64-bc90-3ae8-8f7d-72837581ca13",
      "QuestionnaireId":"41f31b11-47f5-3e29-8c88-1a3615c978a7",
      "Suggestions":"",
      "Explanation":"",
      "IsActive":true,
      "IsDelete":false,
      "DateCreated":"2016-11-01 09:53:00.000",
      "DateUpdated":"2016-11-01 09:53:17.000"
   },
   {  
      "PrefrenceId":"52a74739-bdd3-33ac-a83f-72f60b1992b5",
      "UserId":"327e6c64-bc90-3ae8-8f7d-72837581ca13",
      "QuestionnaireId":"8cd5ac8e-89db-3d7b-bb2d-4e6735b245de",
      "Suggestions":"",
      "Explanation":"",
      "IsActive":true,
      "IsDelete":false,
      "DateCreated":"2016-11-01 09:48:53.000",
      "DateUpdated":"2016-11-01 09:53:15.000"
   },
   {  
      "PrefrenceId":"ae7fc877-b26a-34d3-a5f3-244c7e777e08",
      "UserId":"327e6c64-bc90-3ae8-8f7d-72837581ca13",
      "QuestionnaireId":"d3b98cde-111c-30d5-a4c9-412a76b656eb",
      "Suggestions":"Camping",
      "Explanation":"",
      "IsActive":true,
      "IsDelete":false,
      "DateCreated":"2016-11-01 09:53:02.000",
      "DateUpdated":"2016-11-01 09:53:19.000"
   },
   {  
      "PrefrenceId":"bcac0da7-31a6-345f-be82-ddff17c29b35",
      "UserId":"327e6c64-bc90-3ae8-8f7d-72837581ca13",
      "QuestionnaireId":"8fb1bda7-7ec8-3538-8aa8-ff84637764a4",
      "Suggestions":"",
      "Explanation":"",
      "IsActive":true,
      "IsDelete":false,
      "DateCreated":"2016-11-01 09:53:07.000",
      "DateUpdated":"2016-11-01 09:53:22.000"
   },
   {  
      "PrefrenceId":"ff46ce3c-70cb-3d25-8dbb-10e9c46d4c2d",
      "UserId":"327e6c64-bc90-3ae8-8f7d-72837581ca13",
      "QuestionnaireId":"3afffc17-30e4-311f-a0fc-8daa3bda6c98",
      "Suggestions":"",
      "Explanation":"",
      "IsActive":true,
      "IsDelete":false,
      "DateCreated":"2016-11-01 09:53:05.000",
      "DateUpdated":"2016-11-01 09:53:20.000"
   }
]

我的 POJO 类(class):-

public class SurvivorZAMQuestionList implements Serializable {
    public List<SurvivorZAMQuestionnaire> survivorZAMQuestionnaires;
}


public class SurvivorZAMQuestionnaire implements Serializable {
    public String Suggestions;

    public String PrefrenceId;

    public String IsActive;

    public String IsDelete;

    public String DateCreated;

    public String DateUpdated;

    public String UserId;

    public String QuestionnaireId;

    public String Explanation;
}

但是当我将 json 响应转换为 json 时，它显示以下错误:-com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: 应为 BEGIN_OBJECT 但在第 1 行第 2 列为 BEGIN_ARRAY

谁能告诉我我在 pojo 类(class)中缺少什么。任何形式的举办都应该受到赞赏。

Answer 1

您的回答是正确的，但您的解析不正确。所以首先在你的 gradle 文件中添加 GSON。

编译 'com.google.code.gson:gson:2.4'

现在使用下面的代码来解析您的响应

try {
        JSONArray array = new JSONArray("put your response here");
        Gson gson =  new Gson();
        for (int i = 0 ; i <array.length();i++)
        {
            SurvivorZAMQuestionnaire obj = new SurvivorZAMQuestionnaire();
            obj.add(gson.fromJson(array.getJSONObject(i).toString(),SurvivorZAMQuestionnaire.class));
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }

在列表中添加您的对象并显示它:)