JSONObject jsonObject = new JSONObject("Your_JSON_String");

JSONObject jsonObjectForState = jsonObject.getJSONObject("State");

jsonObjectForState.put("Sname", "New_Value_Here");

put(...)将用新值替换当前值.同样，您可以更新其他值.完成后，您可以使用以下方法将其转换回去:

put(...) will replace the current value with new value. Similarly, you can update the other values. Once you are done, you can convert it back using:

jsonObject.toString();

并将其写回到文件中.