json、map互转

首先，json转map

方法一：

Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();

或

Gson gson = new Gson();

String strjson  例如：

strjson  = { "ret":0, "msg":"", "nickname":"xxx", "figureurl":"http://qzapp.qlogo.cn/qzapp/100226195/C399C7B2880641627CED3EEF9DEB8E30/30", "figureurl_1":"http://qzapp.qlogo.cn/qzapp/100226195/C399C7B2880641627CED3EEF9DEB8E30/50", "figureurl_2":"http://qzapp.qlogo.cn/qzapp/100226195/C399C7B2880641627CED3EEF9DEB8E30/100", "gender":"xxx", "vip":"0", "level":"0", "is_yellow_year_vip":"0" }

Map infoMap = gson.fromJson(strjson, new TypeToken<Map<String, String>>(){}.getType());

方法二：

JSONObject jsonObject = new JSONObject(s);

Map<String,Object> map= new HashMap<String,Object>();
Iterator it = jsonObject.keys();
// 遍历jsonObject数据，添加到Map对象
while (it.hasNext())
{
String key = String.valueOf(it.next());
String value = (String) jsonObject.get(key);
map.put(key, value);
}

return map;

方法三：

JSONObject jasonObject = JSONObject.fromObject(str);
Map<String, Object> map2 = (Map) jasonObject;

但此方法可能不适用， 百度的，出过问题，做个记录。

map转json

JSONObject jsonObject = JSONObject.fromMap(map);

关于jsonArray，留个示例：

 public CarDataResultList<CarIntroEntity> parserJson(String paramString) throws Car273Exception {
        try {
             JSONObject jsonObj = new JSONObject(paramString);
            if (jsonObj.has("total")) {
                defCarIntroList.total = jsonObj.getInt("total");
            }
            if (jsonObj.has("info")) {
                JSONArray infoArray = jsonObj.getJSONArray("info");
                for (int i = 0; i < infoArray.length(); i++) {
                    CarIntroEntity carIntroEntity = new CarIntroEntity();
                    JSONObject json = infoArray.getJSONObject(i);
                    if (json.has("id")) {
                        carIntroEntity.setId(json.getString("id"));
                    }
                   .                   .                   .

                    defCarIntroList.infoList.add(carIntroEntity);
                }
            }
} catch (JSONException e) {

            throw ce;
        }