JSONPrimitive

Library for convert json to LinkedHashMap and back. With maximum simple code as it posible.

Parse String with json

This method does't throw any exception just return null when somesing was wrong

LinkedHashMap<String, Object> parsedData = JsonPrimitive.fromJson(someJsonString);

Convert Object to json String in human-readable format

String json = JsonPrimitive.toJson(parsedData,true);

If you want more control

LinkedHashMap<String, Object> dataMap = null;
ArrayList<Object> dataArray = null;

JsonReader jsonReader = new JsonReader();
JsonWriter jsonWriter = new JsonWriter(true);

try {
    //Parse String with json
    //This method return true if root object is LinkedHashMap and false if it is ArrayList
    if (jsonReader.parse(someJsonString)) {
        //get result
        dataMap = jsonReader.getResultMap();
    } else {
        //get result
        dataArray = jsonReader.getResultArray();
    }
} catch (ParseException e) {
    e.printStackTrace();
}

try {
    //Write object to json file
    jsonWriter.writeToFile(new File("someFile.json"), dataMap);
} catch (IOException e) {
    e.printStackTrace();
}

Also you can read and write to any Stream jsonWriter.writeToStream(OutputStream, Object); jsonReader.parseJson(InputStream)

Work with your custom class objects

You have to implement interface FromJson and/or ToJson which will works with LinkedHashMap<String, Object> as transport

public class Bicycle implements ToJson, FromJson {
	public int cadence;
	public int gear;
	public int speed;

	public Bicycle(int startCadence, int startSpeed, int startGear) {
		gear = startGear;
		cadence = startCadence;
		speed = startSpeed;
	}

	public void setCadence(int newValue) {
		cadence = newValue;
	}

	public void setGear(int newValue) {
		gear = newValue;
	}

	public void applyBrake(int decrement) {
		speed -= decrement;
	}

	public void speedUp(int increment) {
		speed += increment;
	}

	@Override
	public LinkedHashMap<String, Object> toJsonMap() {
		LinkedHashMap<String, Object> data = new LinkedHashMap<String, Object>();
		data.put("cadence", cadence);
		data.put("gear", gear);
		data.put("speed", speed);
		return data;
	}

	//@Override
	public Object fromJsonMap(LinkedHashMap<String, Object> data) {
		return new Bicycle(((Long)data.get("cadence")).intValue(), ((Long)data.get("gear")).intValue(), ((Long)data.get("speed")).intValue());
	}
}

Just try it in "examples" branch.