java - 如何在 Java 中解析这个 JSON？

Question

我目前正在为 android 开发一个测试应用程序，需要解析 JSON 测试数据。

JSON 看起来像这样：

{"id":1,"name":"Test Test","questions":[{"id":1,"test":1,"text":"Kannst du diese Frage beantworten?","answers":[{"id":1,"question":1,"text":"Ja, das ist richtig.","correct":1},{"id":2,"question":1,"text":"Diese Antwort ist falsch.","correct":0},{"id":3,"question":1,"text":"Diese hier ist ebenfalls nicht so ganz korrekt.","correct":0}]},{"id":2,"test":1,"text":"Diese Frage hier ist nicht korrekt.","answers":[{"id":4,"question":2,"text":"Ich glaube dir nicht, das hier ist eh richtig.","correct":1},{"id":5,"question":2,"text":"Diese Antwort ist falsch.","correct":0},{"id":6,"question":2,"text":"Diese hier ist ebenfalls nicht so ganz korrekt.","correct":0}]}]}

我需要的是提取问题及其子数据。

我尝试的是：

JSONObject jObject = new JSONObject(result);
String test = jObject.getJSONObject("id").getJSONArray("questions").toString();

和

String myString = jObject .getJSONObject("questions").getJSONObject("answers").getString("text");

标签： javaandroidjson

Answer 1

像这样解析您的数据：

public class DataModel {
    int id;
    String name;
    ArrayList<Question> questions = new ArrayList<>();


    public class Question {
        int id;
        int test;
        String text;
        ArrayList<Answers> answers = new ArrayList<>();
    }

    public class Answers {
        int id;
        int question;
        String text;
        int correct;
    }


    public DataModel parseResponce(JSONObject response) {
        id = response.optInt("id");
        name = response.optString("name");
        JSONArray array = response.optJSONArray("questions");
        parseQuestion(array);
        return this;
    }


    public void parseQuestion(JSONArray questions) {
        for (int i = 0; i < questions.length(); i++) {
            JSONObject object = questions.optJSONObject(i);
            Question question = new Question();
            question.id = object.optInt("id");
            question.test = object.optInt("test");
            question.text = object.optString("text");
            JSONArray array = object.optJSONArray("answers");
            for (int j = 0; j < array.length(); j++) {
                JSONObject answer = questions.optJSONObject(i);
                Answers ans = new Answers();
                ans.id = answer.optInt("id");
                ans.question = answer.optInt("question");
                ans.text = answer.optString("text");
                ans.correct = answer.optInt("correct");
                question.answers.add(ans);
            }
            this.questions.add(question);
        }
    }
}

只需调用 parseResponce(JSONObject response) 方法并将响应传递给您，您将在 DataModel 对象中获得问题和答案；