写一个java车库管理系统

一个Java车库管理系统可以包括以下功能：

1. 车辆管理：可以添加、删除、修改车辆信息，包括车牌号、品牌、型号、颜色等。
2. 停车管理：记录车辆的进入和离开时间，计算停车时长和费用。
3. 车位管理：管理车库内的停车位，包括车位编号、是否空闲等信息。
4. 收费管理：根据停车时长和费率计算停车费用，并提供收费记录。
5. 查询统计：提供查询功能，可以按照车牌号、品牌等条件查询车辆信息和停车记录，并提供统计功能，如统计每天的停车收入等。

下面是一个简单的Java车库管理系统的示例代码：

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

class Vehicle {
    private String licensePlate;    private String brand;
    private String model;
    private String color;

    public Vehicle(String licensePlate, String brand, String model, String color) {
        this.licensePlate = licensePlate;
        this.brand = brand;
        this.model = model;
        this.color = color;
    }

    // getters and setters
}

class ParkingSpot {
    private int spotNumber;
    private boolean isAvailable;

    public ParkingSpot(int spotNumber) {
        this.spotNumber = spotNumber;
        this.isAvailable = true;
    }

    // getters and setters
}

class ParkingRecord {
    private Vehicle vehicle;
    private long entryTime;
    private long exitTime;

    public ParkingRecord(Vehicle vehicle, long entryTime) {
        this.vehicle = vehicle;
        this.entryTime = entryTime;
    }

    public void setExitTime(long exitTime) {
        this.exitTime = exitTime;
    }

    // getters
}

class Garage {
    private List<ParkingSpot> parkingSpots;
    private List<ParkingRecord> parkingRecords;

    public Garage(int capacity) {
        parkingSpots = new ArrayList<>();        for (int i = 1; i <= capacity; i++) {
            parkingSpots.add(new ParkingSpot(i));
        }
        parkingRecords = new ArrayList<>();
    }

    public void parkVehicle(Vehicle vehicle, long entryTime) {
        ParkingSpot availableSpot = findAvailableSpot();
        if (availableSpot != null) {
            availableSpot.setAvailable(false);
            parkingRecords.add(new ParkingRecord(vehicle, entryTime));
            System.out.println("Vehicle parked at spot " + availableSpot.getSpotNumber());
        } else {
            System.out.println("No available parking spot.");
        }
    }

    public void removeVehicle(Vehicle vehicle, long exitTime) {
        for (ParkingRecord record : parkingRecords) {
            if (record.getVehicle().equals(vehicle) && record.getExitTime() == 0) {
                record.setExitTime(exitTime);
                ParkingSpot spot = findSpotByVehicle(vehicle);
                spot.setAvailable(true);
                System.out.println("Vehicle removed from spot " + spot.getSpotNumber());
                return;
            }
        }
        System.out.println("Vehicle not found or already removed.");
    }

    private ParkingSpot findAvailableSpot() {
        for (ParkingSpot spot : parkingSpots) {
            if (spot.isAvailable()) {
                return spot;
            }
        }
        return null;
    }

    private ParkingSpot findSpotByVehicle(Vehicle vehicle) {
        for (ParkingRecord record : parkingRecords) {
            if (record.getVehicle().equals(vehicle) && record.getExitTime() == 0) {
                return parkingSpots.get(record.getSpotNumber() - 1);
            }
        }
        return null;
    }
}

public class GarageManagementSystem {
    public static void main(String[] args) {
        Garage garage = new Garage(10);

        Vehicle vehicle1 = new Vehicle("ABC123", "Toyota", "Camry", "Red");
        Vehicle vehicle2 = new Vehicle("XYZ789", "Honda", "Accord", "Blue");

        long entryTime1 = System.currentTimeMillis();
        garage.parkVehicle(vehicle1, entryTime1);

        long entryTime2 = System.currentTimeMillis();
        garage.parkVehicle(vehicle2, entryTime2);

        long exitTime1 = System.currentTimeMillis();
        garage.removeVehicle(vehicle1, exitTime1);

        long exitTime2 = System.currentTimeMillis();
        garage.removeVehicle(vehicle2, exitTime2);
    }
}

这个示例代码实现了一个简单的车库管理系统，包括车辆管理、停车管理和收费管理等功能。你可以根据自己的需求进行扩展和修改。