1 Map<String,String> map = new HashMap<String,String>();
2 Enumeration<Object> keys = properties.keys();
3 while(keys.hasMoreElements()){
4     String key = (String)keys.nextElement();
5     String value = (String)properties.get(key);
6     map.put(key,value);
7 }

1 Gson gson = new Gson();
2 String jsonStr = gson.toJson(map);
3 //以下是传输到调用页面
4 PrintWriter pw = response.getWriter();
5 pw.print(jsonStr);
6 pw.flush();