在Java中訪問多個json對象

Question

我正在嘗試使用Java代碼從Json訪問數據，我編寫了Java代碼，同時嘗試訪問json中的“標題”或“值”，但是當我獲取“ title”（即事件1）的一個值時，嘗試使用列表訪問“值”，我得到類似[{"0":"1_a","1":"1_b"}, {"0":"2_a","1":"2_b"}]

我想從“標題”和“值”訪問數據，即事件2也應顯示。 全部進口。 在這里編碼

 public class JsonToJava {

    public void JsontoString() {

        String title;
        String jsonString = "{\"title\":\"Event 1\","
                + "\"param\":[\"1\",\"2\",\"3\",\"4\",\"5\",\"6\",\"7\"],"
                + "\"status\":true,"
                + "\"values\":[{"
                + "\"0\":{\"0\":\"1_a\",\"1\":\"1_b\"},"
                + "\"1\":{\"0\":\"2_a\",\"1\":\"2_b\"}}]"
                + ",\"$$hashKey\":\"object:3\"}"
                + ",{\"title\":\"Event 2\","
                + "\"param\":[\"1\",\"2\",\"3\",\"4\",\"Price1\",\"Price2\",\"5\",\"Status\"],"
                + "\"status\":true," + "\"values\":[{"
                + "\"0\":{\"0\":\"A_a\",\"1\":\"A_b\"},"
                + "\"1\":{\"0\":\"B_a\",\"1\":\"B_b\"}}]"
                + ",\"$$hashKey\":\"object:4\"}";

        try {
            title = new JSONObject(jsonString).getString("title");

            System.out.println(title);

            // JSONObject obj = new
            // JSONObject("{"0":{"0":"1_a","1":"1_b"},"1":{"0":"2_a","1":"2_b"}}");

            JSONObject obj1 = new JSONObject(jsonString);

            List<String> list = new ArrayList<String>();
            JSONArray array = obj1.getJSONArray("values");

            String val = array.getString(0);

            for (int i = 0; i < array.length(); i++) {
                list.add(array.getJSONObject(i).getString("0"));
                list.add(array.getJSONObject(i).getString("1"));
            }

            System.out.println(list);

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

    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        JsonToJava js = new JsonToJava();

        js.JsontoString();
    }
}

Answer 1

嘗試使用此代碼

public void JsontoString() {
    String jsonString = "{\"root\":[{\"title\":\"Event 1\"," + "\"param\":[\"1\",\"2\",\"3\",\"4\",\"5\",\"6\",\"7\"]," + "\"status\":true," + "\"values\":[{"
            + "\"0\":{\"0\":\"1_a\",\"1\":\"1_b\"}," + "\"1\":{\"0\":\"2_a\",\"1\":\"2_b\"}}]" + ",\"$$hashKey\":\"object:3\"}"
            + ",{\"title\":\"Event 2\"," + "\"param\":[\"1\",\"2\",\"3\",\"4\",\"Price1\",\"Price2\",\"5\",\"Status\"]," + "\"status\":true,"
            + "\"values\":[{" + "\"0\":{\"0\":\"A_a\",\"1\":\"A_b\"}," + "\"1\":{\"0\":\"B_a\",\"1\":\"B_b\"}}]" + ",\"$$hashKey\":\"object:4\"}]}";
    try {
        System.out.println(jsonString);
        JSONObject obj1 = new JSONObject(jsonString);

        List<String> list = new ArrayList<String>();
        JSONArray array = obj1.getJSONArray("root");
        for (int i = 0; i < array.length(); i++) {
            list.add(array.getJSONObject(i).getString("title"));
        }
        System.out.println(list);
    } catch (JSONException e) {
        e.printStackTrace();
    }
}