java http请求 回到结果是json ，转成对象使用

java http请求 返回结果是json ，转成对象使用
?URLConnection connection = null;
??????? try {
??????????? connection = new URL("地址...").openConnection();
??????????? connection.connect();???????????? InputStream fin = connection.getInputStream();
??????????? BufferedReader br = new BufferedReader(new InputStreamReader(fin));
??????????? StringBuffer buffer = new StringBuffer();
??????????? String temp = null;
??????????? while ((temp = br.readLine()) != null) {
??????????????? buffer.append(temp);
??????????? }
??????????? JSONArray ct = new JSONArray(buffer.toString());???????????? for (int i = 0; i < ct.length(); i++) {
??????????????? JSONObject obj = ct.getJSONObject(i);
??????????????? obj.get("key");//key...
??????????? }???????? } catch (IOException e) {
??????????? e.printStackTrace();
??????? } catch (JSONException e) {
??????????? e.printStackTrace();
??????? }