java獲取對象的key和value

   JSONObject res_data=  body.getJSONObject("data")；
        Iterator sIterator = res_data.keySet().iterator();
        while(sIterator.hasNext()){
            Object key=sIterator.next();   //循環遍歷每個key
            res_data.getString("key");   //獲取key里的value
     }