java json对象转换数组

public static Map getMap4Json(String jsonString){        JSONObject jsonObject = new JSONObject( jsonString );          Iterator  keyIter = jsonObject.keys();        String key;        Object value;        Map valueMap = new HashMap();        while( keyIter.hasNext())        {            key = (String)keyIter.next();            value = jsonObject.get(key);            valueMap.put(key, value);        }        return valueMap;    }