面向对象程序设计java汽车租赁

面向对象程序设计Java汽车租赁是一种基于Java语言和MySQL数据库的汽车租赁管理系统。该系统可以实现汽车的租赁、归还、查询、统计等功能。以下是该系统的主要功能模块：

1.用户管理模块：实现用户的注册、登录、修改密码等功能。

2.汽车管理模块：实现汽车的添加、删除、修改、查询等功能。

3.租赁管理模块：实现租赁订单的生成、查询、修改、删除等功能。

4.归还管理模块：实现归还订单的生成、查询、修改、删除等功能。

5.统计管理模块：实现租赁订单和归还订单的统计功能。

以下是一个Java汽车租赁管理系统的示例代码：

//汽车类
public class Car {
    private String carId; //汽车编号
    private String carName; //汽车名称
    private double price; //租赁价格
    private boolean isRent; //是否已被租赁

    //构造方法
    public Car(String carId, String carName, double price) {
        this.carId = carId;
        this.carName = carName;
        this.price = price;
        this.isRent = false;
    }

    //getter和setter方法
    public String getCarId() {
        return carId;
    }

    public void setCarId(String carId) {
        this.carId = carId;
    }

    public String getCarName() {
        return carName;
    }

    public void setCarName(String carName) {
        this.carName = carName;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public boolean isRent() {
        return isRent;
    }

    public void setRent(boolean rent) {
        isRent = rent;
    }
}

//租赁订单类
public class RentOrder {
    private String orderId; //订单编号
    private String userId; //用户编号
    private String carId; //汽车编号
    private Date rentDate; //租赁日期
    private Date returnDate; //归还日期
    private double rentPrice; //租赁价格

    //构造方法
    public RentOrder(String orderId, String userId, String carId, Date rentDate, Date returnDate, double rentPrice) {
        this.orderId = orderId;
        this.userId = userId;        this.carId = carId;
        this.rentDate = rentDate;
        this.returnDate = returnDate;
        this.rentPrice = rentPrice;
    }

    //getter和setter方法
    public String getOrderId() {
        return orderId;
    }

    public void setOrderId(String orderId) {
        this.orderId = orderId;
    }

    public String getUserId() {
        return userId;
    }

    public void setUserId(String userId) {
        this.userId = userId;
    }

    public String getCarId() {
        return carId;
    }

    public void setCarId(String carId) {
        this.carId = carId;
    }

    public Date getRentDate() {
        return rentDate;
    }

    public void setRentDate(Date rentDate) {
        this.rentDate = rentDate;
    }

    public Date getReturnDate() {
        return returnDate;
    }

    public void setReturnDate(Date returnDate) {
        this.returnDate = returnDate;
    }

    public double getRentPrice() {
        return rentPrice;
    }

    public void setRentPrice(double rentPrice) {
        this.rentPrice = rentPrice;
    }
}

//租赁系统类
public class RentCarSys {
    private List<Car> carList; //汽车列表
    private List<RentOrder> rentOrderList; //租赁订单列表
    private Scanner scanner; //输入流

    //构造方法
    public RentCarSys() {
        this.carList = new ArrayList<>();
        this.rentOrderList = new ArrayList<>();
        this.scanner = new Scanner(System.in);
    }

    //添加汽车
    public void addCar() {
        System.out.println("请输入汽车编号：");
        String carId = scanner.nextLine();
        System.out.println("请输入汽车名称：");
        String carName = scanner.nextLine();
        System.out.println("请输入租赁价格：");
        double price = scanner.nextDouble();
        scanner.nextLine();
        Car car = new Car(carId, carName, price);
        carList.add(car);
        System.out.println("添加成功！");
    }

    //删除汽车
    public void deleteCar() {
        System.out.println("请输入汽车编号：");
        String carId = scanner.nextLine();
        for (Car car : carList) {
            if (car.getCarId().equals(carId)) {
                carList.remove(car);
                System.out.println("删除成功！");
                return;
            }
        }
        System.out.println("未找到该汽车！");
    }

    //修改汽车信息
    public void modifyCar() {
        System.out.println("请输入汽车编号：");
        String carId = scanner.nextLine();
        for (Car car : carList) {
            if (car.getCarId().equals(carId)) {
                System.out.println("请输入新的汽车名称：");
                String carName = scanner.nextLine();
                System.out.println("请输入新的租赁价格：");
                double price = scanner.nextDouble();
                scanner.nextLine();
                car.setCarName(carName);
                car.setPrice(price);
                System.out.println("修改成功！");
                return;
            }
        }
        System.out.println("未找到该汽车！");
    }

    //查询汽车信息
    public void queryCar() {
        System.out.println("请输入汽车编号：");
        String carId = scanner.nextLine();
        for (Car car : carList) {
            if (car.getCarId().equals(carId)) {
                System.out.println("汽车编号：" + car.getCarId());
                System.out.println("汽车名称：" + car.getCarName());
                System.out.println("租赁价格：" + car.getPrice());
                System.out.println("是否已被租赁：" + car.isRent());
                return;
            }
        }
        System.out.println("未找到该汽车！");
    }

    //生成租赁订单
    public void generateRentOrder() {
        System.out.println("请输入用户编号：");
        String userId = scanner.nextLine();
        System.out.println("请输入汽车编号：");
        String carId = scanner.nextLine();
        for (Car car : carList) {
            if (car.getCarId().equals(carId)) {
                if (car.isRent()) {
                    System.out.println("该汽车已被租赁！");
                    return;
                } else {
                    System.out.println("请输入租赁日期（格式为yyyy-MM-dd）：");
                    String rentDateStr = scanner.nextLine();
                    Date rentDate = null;
                    try {
                        rentDate = new SimpleDateFormat("yyyy-MM-dd").parse(rentDateStr);
                    } catch (ParseException e) {
                        System.out.println("日期格式错误！");
                        return;
                    }
                    System.out.println("请输入归还日期（格式为yyyy-MM-dd）：");
                    String returnDateStr = scanner.nextLine();
                    Date returnDate = null;
                    try {
                        returnDate = new SimpleDateFormat("yyyy-MM-dd").parse(returnDateStr);
                    } catch (ParseException e) {
                        System.out.println("日期格式错误！");
                        return;
                    }
                    double rentPrice = (returnDate.getTime() - rentDate.getTime()) / (1000 * 60 * 60 * 24) * car.getPrice();
                    RentOrder rentOrder = new RentOrder(UUID.randomUUID().toString(), userId, carId, rentDate, returnDate, rentPrice);
                    rentOrderList.add(rentOrder);
                    car.setRent(true);
                    System.out.println("租赁成功！");
                    return;
                }
            }
        }
        System.out.println("未找到该汽车！");
    }

    //归还租赁订单
    public void returnRentOrder() {
        System.out.println("请输入订单编号：");
        String orderId = scanner.nextLine();
        for (RentOrder rentOrder : rentOrderList) {
            if (rentOrder.getOrderId().equals(orderId)) {
                rentOrderList.remove(rentOrder);
                for (Car car : carList) {
                    if (car.getCarId().equals(rentOrder.getCarId())) {
                        car.setRent(false);
                        break;
                    }
                }
                System.out.println("归还成功！");
                return;
            }
        }
        System.out.println("未找到该订单！");
    }

    //统计租赁订单和归还订单
    public void countOrder() {
        System.out.println("请输入统计类型（1-租赁订单，2-归还订单）：");
        int type = scanner.nextInt();
        scanner.nextLine();
        System.out.println("请输入统计开始日期（格式为yyyy-MM-dd）：");
        String startDateStr = scanner.nextLine();
        Date startDate = null;
        try {
            startDate = new SimpleDateFormat("yyyy-MM-dd").parse(startDateStr);
        } catch (ParseException e) {
            System.out.println("日期格式错误！");
            return;
        }
        System.out.println("请输入统计结束日期（格式为yyyy-MM-dd）：");
        String endDateStr = scanner.nextLine();
        Date endDate = null;
        try {
            endDate = new SimpleDateFormat("yyyy-MM-dd").parse(endDateStr);
        } catch (ParseException e) {
            System.out.println("日期格式错误！");
            return;
        }
        int count = 0;
        double totalPrice = 0;
        if (type == 1) {
            for (RentOrder rentOrder : rentOrderList) {
                if (rentOrder.getRentDate().getTime() >= startDate.getTime() && rentOrder.getRentDate().getTime() <= endDate.getTime()) {
                    count++;
                    totalPrice += rentOrder.getRentPrice();
                }
            }
            System.out.println("租赁订单数量：" + count);
            System.out.println("租赁订单总金额：" + totalPrice);
        } else if (type == 2) {
            for (RentOrder rentOrder : rentOrderList) {
                if (rentOrder.getReturnDate().getTime() >= startDate.getTime() && rentOrder.getReturnDate().getTime() <= endDate.getTime()) {
                    count++;
                    totalPrice += rentOrder.getRentPrice();
                }
            }
            System.out.println("归还订单数量：" + count);
            System.out.println("归还订单总金额：" + totalPrice);
        } else {
            System.out.println("统计类型错误！");
        }
    }

    //启动租赁系统
    public void starRentCarSys() throws IOException, OverChoiceException, ErrorSetException {
        System.out.println("欢迎使用汽车租赁管理系统！");
        while (true) {
            System.out