java拼接JSON串

String str = "{"route":"onGift","time":"","userId":"","userName":"","level":"1_2_2_2_0","adminType":0,"tuserId":""," +
        ""tuserName":"","tlevel":"10_2_2_2_0","roomId":"","giftId":"001","fcId":"0","amount":"1","price":"0","bean":"6546316"}";

JSONObject json = null;

try {
    json = new JSONObject(str);
} catch (JSONException e) {
    e.printStackTrace();
}