Java实现订单管理核心功能详解

public class Order {
    private String orderId;
    private String customerName;
    private double amount;
    private String orderTime;
    private String status;

    public Order(String orderId, String customerName, double amount, String orderTime, String status) {
        this.orderId = orderId;
        this.customerName = customerName;
        this.amount = amount;
        this.orderTime = orderTime;
        this.status = status;
    }

    // Getter 和 Setter 方法
    public String getOrderId() { return orderId; }
    public void setOrderId(String orderId) { this.orderId = orderId; }

    public String getCustomerName() { return customerName; }
    public void setCustomerName(String customerName) { this.customerName = customerName; }

    public double getAmount() { return amount; }
    public void setAmount(double amount) { this.amount = amount; }

    public String getOrderTime() { return orderTime; }
    public void setOrderTime(String orderTime) { this.orderTime = orderTime; }

    public String getStatus() { return status; }
    public void setStatus(String status) { this.status = status; }

    @Override
    public String toString() {
        return "Order{" +
                "orderId='" + orderId + '\'' +
                ", customerName='" + customerName + '\'' +
                ", amount=" + amount +
                ", orderTime='" + orderTime + '\'' +
                ", status='" + status + '\'' +
                '}';
    }
}

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

public class OrderService {
    private List orders = new ArrayList<>();

    // 添加订单
    public void addOrder(Order order) {
        orders.add(order);
        System.out.println("订单已添加: " + order.getOrderId());
    }

    // 根据订单ID查找订单
    public Order findOrderById(String orderId) {
        for (Order order : orders) {
            if (order.getOrderId().equals(orderId)) {
                return order;
            }
        }
        return null;
    }

    // 查询所有订单
    public List getAllOrders() {
        return new ArrayList<>(orders);
    }

    // 更新订单状态
    public boolean updateOrderStatus(String orderId, String newStatus) {
        Order order = findOrderById(orderId);
        if (order != null) {
            order.setStatus(newStatus);
            System.out.println("订单状态已更新为: " + newStatus);
            return true;
        } else {
            System.out.println("未找到订单: " + orderId);
            return false;
        }
    }

    // 删除订单
    public boolean deleteOrder(String orderId) {
        Order order = findOrderById(orderId);
        if (order != null) {
            orders.remove(order);
            System.out.println("订单已删除: " + orderId);
            return true;
        } else {
            System.out.println("删除失败，未找到订单: " + orderId);
            return false;
        }
    }
}

public class Main {
    public static void main(String[] args) {
        OrderService service = new OrderService();

        // 创建订单
        Order order1 = new Order("O001", "张三", 299.9, "2025-04-05 10:00", "待付款");
        Order order2 = new Order("O002", "李四", 588.0, "2025-04-05 10:05", "已发货");

        // 添加订单
        service.addOrder(order1);
        service.addOrder(order2);

        // 查询所有订单
        System.out.println("\n所有订单:");
        for (Order order : service.getAllOrders()) {
            System.out.println(order);
        }

        // 查找特定订单
        Order found = service.findOrderById("O001");
        if (found != null) {
            System.out.println("\n找到订单: " + found);
        }

        // 更新订单状态
        service.updateOrderStatus("O001", "已付款");

        // 删除订单
        service.deleteOrder("O002");

        // 再次查看剩余订单
        System.out.println("\n删除后剩余订单:");
        for (Order order : service.getAllOrders()) {
            System.out.println(order);
        }
    }
}