Question

字符串数组存储在al arraylist中，它是JSON格式。现在我想将该arraylist转换为普通对象。我如何转换它？

public class Json {

    public static void main(String[] args) {

    ArrayList al = new ArrayList();
    al.add(1);
    al.add("Lokesh");
    al.add("Gupta");
    al.add(Arrays.asList("ADMIN", "MANAGER"));

    Gson gson = new Gson();
    System.out.println(gson.toJson(al));
}}

Answer 1

使用您的属性创建一个对象，例如： -

public class User {
    Integer id;
    String firstName,
    String lastName;
    List<Role> roles;// Where roles is a list of another Object Role
    //getter and setter methods
}

然后，

    public class Manager{
        public static void main(String[] args) {
            String json = "{'id':1,'firstName':'Deva','lastName':'Raj','roles':['ADMIN','MANAGER']}";
            Gson gson = new Gson();
            User user = gson.fromJson(json, User.class);
            System.out.println(user);
        }
    }

如何将json转换为普通对象？

1 个答案: