如何在java中为请求体创建存储键值对列表的POJO类？

public class KeyValue {
    private String key;
    private String value;

    // 构造方法
    public KeyValue(String key, String value) {
        this.key = key;
        this.value = value;
    }

    // getter和setter方法
    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }
}

import java.util.ArrayList;
import java.util.List;

public class RequestData {
    private List<KeyValue> keyValueList;

    // 构造方法
    public RequestData() {
        keyValueList = new ArrayList<>();
    }

    // 添加键值对的方法
    public void addKeyValue(String key, String value) {
        KeyValue keyValue = new KeyValue(key, value);
        keyValueList.add(keyValue);
    }

    // 获取键值对列表的方法
    public List<KeyValue> getKeyValueList() {
        return keyValueList;
    }
}

public class Main {
    public static void main(String[] args) {
        RequestData requestData = new RequestData();
        requestData.addKeyValue("name", "John");
        requestData.addKeyValue("age", "25");

        List<KeyValue> keyValueList = requestData.getKeyValueList();
        for (KeyValue keyValue : keyValueList) {
            System.out.println("Key: " + keyValue.getKey() + ", Value: " + keyValue.getValue());
        }
    }
}

Key: name, Value: John
Key: age, Value: 25