如何使用Gson将Json转换为Java对象

Question

假设我有json字符串

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

现在我有一个用户类

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

现在如何将上面的json字符串转换为用户类对象

Answer 1

试试这个：

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);