java JSONObject与Map互相转换

private Map<String, String>  options = new HashMap<String, String>();

private void parseOptions(JSONObject json) throws JSONException {
Iterator<String> iter = json.keys();
while (iter.hasNext()) {
String key = iter.next();
options.put(key, json.getString(key));
}
}

private JSONObject optionsToJSON() throws JSONException {
JSONObject json = new JSONObject();
Iterator<String> iter = options.keySet().iterator();
while (iter.hasNext()) {
String key = iter.next();
json.put(key, options.get(key));
}
return json;
}