在Java中使用JSON创建对象

import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
    public static void main(String[] args) {
        // 1. 导入Jackson库的依赖，这里使用的是Jackson的核心库
        // 需要在pom.xml文件中添加以下依赖
        // <dependency>
        //     <groupId>com.fasterxml.jackson.core</groupId>
        //     <artifactId>jackson-databind</artifactId>
        //     <version>2.12.1</version>
        // </dependency>

        // 2. 创建Java对象
        Person person = new Person("John", 25);

        // 3. 序列化为JSON
        ObjectMapper mapper = new ObjectMapper();
        try {
            String json = mapper.writeValueAsString(person);
            System.out.println(json);
        } catch (Exception e) {
            e.printStackTrace();
        }

        // 4. 反序列化为Java对象
        String jsonString = "{\"name\":\"Alice\",\"age\":30}";
        try {
            Person deserializedPerson = mapper.readValue(jsonString, Person.class);
            System.out.println(deserializedPerson.getName());
            System.out.println(deserializedPerson.getAge());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

class Person {
    private String name;
    private int age;

    public Person() {}

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    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;
    }
}