json串转化为map并迭代

                 JSONObject json = new JSONObject();<span style="white-space:pre"></span>   <span style="white-space:pre"></span> json.put("content", "1");<span style="white-space:pre"></span>  <span style="white-space:pre"></span> json.put("grpId", "2");<span style="white-space:pre"></span>  <span style="white-space:pre"></span> json.put("key", qq");<span style="white-space:pre"></span>  <span style="white-space:pre"></span> json.put("parametersMap", "{'username':'张三'}");<span style="white-space:pre"></span>  <span style="white-space:pre"></span> json.put("templateCode", "admin");     Map m = j;    Iterator<Map.Entry<String, Object>> entries = m.entrySet().iterator();  while (entries.hasNext()) {      Entry<String, Object> entry = entries.next();      System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());  }