JAXB @XmlElements 订单

使用JAXB的@XmlElements注解可以轻松地处理订单数据。JAXB是Java架构用于XML绑定的API，它允许将Java对象与XML文档相互转换。在处理订单数据时，@XmlElements注解可以用于定义订单中的不同元素，并将它们映射到Java对象的属性。下面将介绍如何使用@XmlElements注解处理订单数据，并给出相应的代码示例。

java
@XmlRootElement
public class Order {
    private String orderNumber;
    private String customerName;
    private String orderDate;
    private List orderDetails;
    // Getters and Setters
    @XmlElement(name = "orderNumber")
    public String getOrderNumber() {
        return orderNumber;
    }
    public void setOrderNumber(String orderNumber) {
        this.orderNumber = orderNumber;
    }
    @XmlElement(name = "customerName")
    public String getCustomerName() {
        return customerName;
    }
    public void setCustomerName(String customerName) {
        this.customerName = customerName;
    }
    @XmlElement(name = "orderDate")
    public String getOrderDate() {
        return orderDate;
    }
    public void setOrderDate(String orderDate) {
        this.orderDate = orderDate;
    }
    @XmlElementWrapper(name = "orderDetails")
    @XmlElements({
        @XmlElement(name = "orderDetail", type = OrderDetail.class)
    })
    public List getOrderDetails() {
        return orderDetails;
    }
    public void setOrderDetails(List orderDetails) {
        this.orderDetails = orderDetails;
    }
}

java
public class OrderDetail {
    private String productName;
    private int quantity;
    private double price;
    // Getters and Setters
    @XmlElement(name = "productName")
    public String getProductName() {
        return productName;
    }
    public void setProductName(String productName) {
        this.productName = productName;
    }
    @XmlElement(name = "quantity")
    public int getQuantity() {
        return quantity;
    }
    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }
    @XmlElement(name = "price")
    public double getPrice() {
        return price;
    }
    public void setPrice(double price) {
        this.price = price;
    }
}

java
public class JAXBExample {
    public static void main(String[] args) throws JAXBException {
        // 创建订单对象
        Order order = new Order();
        order.setOrderNumber("123456");
        order.setCustomerName("John Doe");
        order.setOrderDate("2022-01-01");
        // 创建订单详情列表
        List orderDetails = new ArrayList<>();
        // 创建订单详情对象
        OrderDetail orderDetail1 = new OrderDetail();
        orderDetail1.setProductName("Product 1");
        orderDetail1.setQuantity(2);
        orderDetail1.setPrice(10.0);
        // 添加订单详情到列表
        orderDetails.add(orderDetail1);
        // 设置订单详情列表
        order.setOrderDetails(orderDetails);
        // 创建JAXB上下文
        JAXBContext context = JAXBContext.newInstance(Order.class);
        // 创建Marshaller
        Marshaller marshaller = context.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        // 将订单对象转换为XML并打印输出
        marshaller.marshal(order, System.out);
    }
}