将字符串转换为json不适用于java

Question

我有一个转换字符串到json的问题.也就是说,我的json字符串是:

{"serverId":2,"deviceId":736,"analysisDate":"2017-05-11T07:20:27.713Z","eventType":"Logs","eventAttributes":[{"name":"level","value":"INFO"},{"name":"type","value":"Video Blocked On"},{"name":"cameraId","value":"722"},{"name":"userId","value":"1"}]}

我的代码:

    try {
        JSONObject object = new JSONObject(jsonString);
        JSONArray array = object.getJSONArray("eventAttributes");
        System.out.println("ARRAY: " + array);

        for (int i = 0; i < array.length(); i++) {
            JSONObject obj = new JSONObject(array.getJSONObject(i));
            System.out.println("OBJ: " + obj);

        }
    } catch (JSONException ex) {
        Exceptions.printStackTrace(ex);
    }

System.out.println数组是:

[{"name":"level","value":"INFO"},{"name":"type","value":"Video Blocked On"},{"name":"cameraId","value":"722"},{"name":"userId","value":"1"}]

但如果我打印obj是"{}",则是四次.所以它是正确的,因为数组有4个元素,但为什么它是空对象？我正在使用org.json.

谢谢

Answer 1

array.getJSONObject(i)已经返回了一个类型的对象,JSONObject你不需要将它传递给JSONObject类的构造函数.

简单地写

...
for (int i = 0; i < array.length(); i++) {
   JSONObject obj = array.getJSONObject(i);
   System.out.println("OBJ: " + obj);
}
...