一、依賴Gson:
//list轉換爲json
Gson gson = new Gson();
List<User> users = new ArrayList<User>();
String str = gson.toJson(users);
//json轉換爲list
Gson gson = new Gson();
List<User> users = gson.fromJson(str, new TypeToken<List<User>>(){}.getType());
二、依賴fastJson:
//list轉換爲json
List<User> list = new ArrayList<User>();
String str=JSON.toJSON(list).toString();
//json轉換爲list
List<User> list = new ArrayList<User>();
list = JSONObject.parseArray(jasonArray, User.class);