Jackson在不使用注释的情况下更改值的键

import com.fasterxml.jackson.databind.ObjectMapper;

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

        try {
            // 将JSON数据解析为Java对象
            ObjectMapper objectMapper = new ObjectMapper();
            Person person = objectMapper.readValue(json, Person.class);

            // 更改值的键
            person.setName("Jackson");

            // 将更改后的Java对象转换回JSON格式
            String updatedJson = objectMapper.writeValueAsString(person);
            System.out.println(updatedJson);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

class Person {
    private String name;
    private int age;

    // getter和setter方法

    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;
    }
}