String params="";//json格式的字符串

JSONObject  data = JSONObject .fromObject(params);

Set<Map.Entry<String, Object>> entries = data.entrySet();

Iterator<Map.Entry<String, Object>> it = entries.iterator(); String param="";
while (it.hasNext()) {       Map.Entry<String, Object> next = it.next();       String key = next.getKey();       Object value = next.getValue(); 　   param+=key+"="+value; } System.out.println(param);