Java - Acceso a rest desde aplicacion java

HttpClient client = new HttpClient();

			method = new PostMethod(url);

			JSONObject jsonO = new JSONObject();

			jsonO.put("key", "value");

			StringRequestEntity requestEntity = new StringRequestEntity(

					jsonO.toJSONString(), "application/json", "UTF-8");

			method.setRequestEntity(requestEntity);

			int codigoRespuesta = client.executeMethod(method);

			Object obj = JSONValue.parse(method.getResponseBodyAsString());

			System.out.println(codigoRespuesta);

			JSONObject obj2 = (JSONObject) obj;

			System.out.println(obj2.toJSONString());