String json = "{''data'':[{''name'':''Wallace''},{''name'':''Grommit''}]}";

StringBuffer  marketXml = new StringBuffer();

 jsonObjSplit = new JSONObject(json );

      JSONArray ja = jsonObjSplit.getJSONArray("data'");

      for (int i = ; i < ja.length(); i++) {

            JSONObject jo = (JSONObject) ja.get(i);

           marketXml.append(jo.get(''name'"));

           System.out.println(marketXml.toString());

     }

-------------------------------------------------------------------------遍历json 对象

    jsonObj = new JSONObject(activeMarketRet);

    for (Iterator iter = jsonObj.keys(); iter.hasNext();) { //先遍历整个 people 对象

        String key = (String)iter.next();

        System.out.println(jsonObj .getString(Key));

   ｝