Assuming your JSON object is saved in a file “simple.json”, you can iterate over the attribute-value pairs as follows: JSONParser parser = new JSONParser(); Object obj = parser.parse(new FileReader(“simple.json”)); JSONObject jsonObject = (JSONObject) obj; for(Iterator iterator = jsonObject.keySet().iterator(); iterator.hasNext();) { String key = (String) iterator.next(); System.out.println(jsonObject.get(key)); }
Use a JSON library to parse the string and retrieve the value. The following very basic example uses the built-in JSON parser from Android. String jsonString = “{ \”name\” : \”John\”, \”age\” : \”20\”, \”address\” : \”some address\” }”; JSONObject jsonObject = new JSONObject(jsonString); int age = jsonObject.getInt(“age”); More advanced JSON libraries, such as jackson, … Read more
The whole file is an array and there are objects and other arrays (e.g. cars) in the whole array of the file. As you say, the outermost layer of your JSON blob is an array. Therefore, your parser will return a JSONArray. You can then get JSONObjects from the array … JSONArray a = (JSONArray) … Read more
Google’s GSON can do this in a nice way: Gson gson = new GsonBuilder().setPrettyPrinting().create(); JsonParser jp = new JsonParser(); JsonElement je = jp.parse(uglyJsonString); String prettyJsonString = gson.toJson(je); or since it is now recommended to use the static parse method from JsonParser you can also use this instead: Gson gson = new GsonBuilder().setPrettyPrinting().create(); JsonElement je = … Read more