如何使用Gson将Json转换为Java对象

假设我有json字符串

{"userId":"1","userName":"Yasir"} 

现在我有一个类用户

 class User{ int userId; String userName; //setters and getters } 

现在我如何将上面的json字符串转换为用户类对象

Answer 1

尝试这个：

 Gson gson = new Gson(); String jsonInString = "{\"userId\":\"1\",\"userName\":\"Yasir\"}"; User user= gson.fromJson(jsonInString, User.class); 

Answer 2

 User user= gson.fromJson(jsonInString, User.class); // where jsonInString is your json {"userId":"1","userName":"Yasir"} 

Answer 3

 Gson gson = new Gson(); User user = gson.fromJson("{\"userId\":\"1\",\"userName\":\"Yasir\"}", User.class)); 

Answer 4

 Gson gson = new Gson(); User u=gson.fromJson(jsonstring, User.class); System.out.println("userName: "+u.getusername);