如何基于Key对JSON对象进行排序？ [英] How can i sort my JSON object based on Key?

问题描述

我正在创建一个JSON对象，我在其中添加一个键和一个数组值。 key和value的值来自TreeSet，它具有排序形式的数据。但是，当我在我的json对象中插入数据时，它是随机存储的，没有任何顺序。
这是我目前的json对象：

I am creating a JSON object in which i am adding a key and a value which is an array. The value for both key and value comes from a TreeSet which has data in sorted form. However, when I insert data in my json object, it is stored randomly without any order. This is my json object currently:

{
    "SPAIN":["SPAIN","this"],
    "TAIWAN":["TAIWAN","this"],
    "NORWAY":["NORWAY","this"],
    "LATIN_AMERICA":["LATIN_AMERICA","this"]
}

我的代码是：

 Iterator<String> it= MyTreeSet.iterator();

        while (it.hasNext()) {
            String country = it.next();
            System.out.println("----country"+country);
            JSONArray jsonArray = new JSONArray();
            jsonArray.put(country);
            jsonArray.put("this);

            jsonObj.put(country, jsonArray);
        }

我有什么方法可以将数据存储到while循环内部的json对象中吗？

Is there any way I can store the data into my json object inside the while loop itself?

推荐答案

适用于Google Gson API。尝试一下。

It works with Google Gson API. Try it out.

    try{

        TreeSet<String> MyTreeSet = new TreeSet<String>();
        MyTreeSet.add("SPAIN");
        MyTreeSet.add("TAIWNA");
        MyTreeSet.add("INDIA");
        MyTreeSet.add("JAPAN");

        System.out.println(MyTreeSet);
        Iterator<String> it= MyTreeSet.iterator();
        JsonObject gsonObj = new JsonObject();
        JSONObject jsonObj = new JSONObject();
        while (it.hasNext()) {
            String country = it.next();
            System.out.println("----country"+country);
            JSONArray jsonArray = new JSONArray();
            jsonArray.put(country);
            jsonArray.put("this");

            jsonObj.put(country, jsonArray);

            JsonArray gsonArray = new JsonArray();

            gsonArray.add(new JsonPrimitive("country"));
            gsonArray.add(new JsonPrimitive("this"));
            gsonObj.add(country, gsonArray);
        }
        System.out.println(gsonObj.toString());
        System.out.println(jsonObj.toString());




    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

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