如何在javafx/java中调用json字段

import org.json.JSONObject;

String jsonString = "{\"name\":\"John\",\"age\":30}";
JSONObject jsonObject = new JSONObject(jsonString);

String name = jsonObject.getString("name");

class Address {
    private String city;
    private String street;

    // getter and setter methods
}

class Person {
    private String name;
    private int age;
    private Address address;

    // getter and setter methods
}

// 解析JSON字符串
String jsonString = "{\"name\":\"John\",\"age\":30,\"address\":{\"city\":\"New York\",\"street\":\"123 Main St\"}}";
JSONObject jsonObject = new JSONObject(jsonString);

// 获取嵌套字段的值
String city = jsonObject.getJSONObject("address").getString("city");