如何将xml值转换为对象

import org.w3c.dom.*;
import javax.xml.parsers.*;
import java.io.*;

public class XMLToObjectConverter {
    public static void main(String[] args) {
        try {
            // 创建XML解析器工厂
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            
            // 解析XML文件
            Document document = builder.parse(new File("data.xml"));
            
            // 获取根节点
            Element root = document.getDocumentElement();
            
            // 创建对象模型
            Order order = new Order();
            
            // 遍历XML树
            NodeList nodeList = root.getChildNodes();
            for (int i = 0; i < nodeList.getLength(); i++) {
                Node node = nodeList.item(i);
                
                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    Element element = (Element) node;
                    
                    // 根据节点名称设置对象属性
                    switch (element.getTagName()) {
                        case "id":
                            order.setId(Integer.parseInt(element.getTextContent()));
                            break;
                        case "customer":
                            order.setCustomer(element.getTextContent());
                            break;
                        case "total":
                            order.setTotal(Double.parseDouble(element.getTextContent()));
                            break;
                        // 处理其他节点...
                    }
                }
            }
            
            // 返回对象
            System.out.println(order);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

class Order {
    private int id;
    private String customer;
    private double total;
    
    // getter和setter方法...
    
    @Override
    public String toString() {
        return "Order [id=" + id + ", customer=" + customer + ", total=" + total + "]";
    }
}

<order>
    <id>123</id>
    <customer>John Doe</customer>
    <total>99.99</total>
</order>