如何通过传递对象类型转换为json to object

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.5</version>
</dependency>

public class Person {
    private String name;
    private int age;

    // 构造函数、getter和setter方法省略
}

import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
    public static void main(String[] args) throws Exception {
        Person person = new Person();
        person.setName("John");
        person.setAge(25);

        ObjectMapper objectMapper = new ObjectMapper();
        String json = objectMapper.writeValueAsString(person);

        System.out.println(json);
    }
}

import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
    public static void main(String[] args) throws Exception {
        String json = "{\"name\":\"John\",\"age\":25}";

        ObjectMapper objectMapper = new ObjectMapper();
        Person person = objectMapper.readValue(json, Person.class);

        System.out.println(person.getName());
        System.out.println(person.getAge());
    }
}