java 解析json 遍历未知key

import net.sf.json.JSONObject;

String json = "{\"name\":\"lss\"}";
	    JSONObject jsonObj = JSONObject.fromObject(json);
	    String name = jsonObj.getString("name");
	    
	    Iterator it = jsonObj.keys();
        List<String> keyListstr = new ArrayList<String>();
        while(it.hasNext()){
        	keyListstr.add(it.next().toString());
        }