Jackson将字符串到已声明类的映射解析为字符串到映射的映射。我如何让它创建声明类的对象呢？

import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
    public static void main(String[] args) {
        String jsonString = "{\"name\":\"John\", \"age\":30}";

        try {
            ObjectMapper objectMapper = new ObjectMapper();
            MyClass myObject = objectMapper.readValue(jsonString, MyClass.class);

            System.out.println(myObject.getName());
            System.out.println(myObject.getAge());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

class MyClass {
    private String name;
    private int age;

    // Getters and setters

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}