火车购票系统概述

火车购票系统是一个用于处理乘客购买火车票的应用程序，该系统需要实现以下功能：

1、显示可用的火车线路和座位信息；

2、允许乘客选择要购买的车票类型（如硬座、软座、硬卧、软卧等）；

3、计算票价，包括票务费、手续费等；

4、处理乘客支付和退票操作；

5、记录乘客的购票信息和退票信息。

火车购票系统代码实现

以下是一个简单的火车购票系统代码实现，使用Java编写：

// 火车线路类
class TrainRoute {
    private String startStation;
    private String endStation;
    private double price;
    public TrainRoute(String startStation, String endStation, double price) {
        this.startStation = startStation;
        this.endStation = endStation;
        this.price = price;
    }
    public String getStartStation() {
        return startStation;
    }
    public String getEndStation() {
        return endStation;
    }
    public double getPrice() {
        return price;
    }
}
// 火车票类
class TrainTicket {
    private TrainRoute route;
    private String seatType;
    private double totalPrice;
    public TrainTicket(TrainRoute route, String seatType) {
        this.route = route;
        this.seatType = seatType;
        this.totalPrice = calculateTotalPrice();
    }
    private double calculateTotalPrice() {
        double basePrice = route.getPrice();
        double ticketFee = 0;
        double serviceFee = 0;
        switch (seatType) {
            case "硬座":
                ticketFee = basePrice * 0.5;
                break;
            case "软座":
                ticketFee = basePrice * 0.6;
                break;
            case "硬卧":
                ticketFee = basePrice * 0.8;
                break;
            case "软卧":
                ticketFee = basePrice * 0.9;
                break;
        }
        serviceFee = ticketFee * 0.05;
        return ticketFee + serviceFee;
    }
    public TrainRoute getRoute() {
        return route;
    }
    public String getSeatType() {
        return seatType;
    }
    public double getTotalPrice() {
        return totalPrice;
    }
}
// 购票系统类
class TrainBookingSystem {
    private List<TrainTicket> tickets;
    public TrainBookingSystem() {
        tickets = new ArrayList<>();
    }
    public void addTicket(TrainTicket ticket) {
        tickets.add(ticket);
    }
    public void displayTickets() {
        System.out.println("购票信息：");
        System.out.println("| 车次 | 出发站 | 到达站 | 座位类型 | 票价 |");
        for (TrainTicket ticket : tickets) {
            System.out.printf("| %s | %s | %s | %s | %.2f |%n", ticket.getRoute().getStartStation(), ticket.getRoute().getEndStation(), ticket.getSeatType(), ticket.getTotalPrice());
        }
    }
}
// 主程序入口
public class Main {
    public static void main(String[] args) {
        TrainRoute route1 = new TrainRoute("北京", "上海", 100);
        TrainRoute route2 = new TrainRoute("广州", "深圳", 150);
        TrainTicket ticket1 = new TrainTicket(route1, "硬座");
        TrainTicket ticket2 = new TrainTicket(route2, "软卧");
        TrainBookingSystem bookingSystem = new TrainBookingSystem();
        bookingSystem.addTicket(ticket1);
        bookingSystem.addTicket(ticket2);
        bookingSystem.displayTickets();
    }
}

单元测试

为了确保火车购票系统的正确性，我们需要对各个模块进行单元测试，以下是一个简单的单元测试示例：

import org.junit.Test;
import static org.junit.Assert.*;
public class TrainBookingSystemTest {
    @Test
    public void testAddTicket() {
        TrainRoute route1 = new TrainRoute("北京", "上海", 100);
        TrainTicket ticket1 = new TrainTicket(route1, "硬座");
        TrainBookingSystem bookingSystem = new TrainBookingSystem();
        bookingSystem.addTicket(ticket1);
        assertEquals(1, bookingSystem.getTickets().size());
        assertEquals(ticket1, bookingSystem.getTickets().get(0));
    }
}