用Java写一个电影购票系统的代码，要求使用文件读写

好的，以下是一个简单的电影购票系统的Java代码，使用了文件读写操作：

Movie.java：

import java.io.Serializable;

public class Movie implements Serializable {
    private static final long serialVersionUID = 1L;

    private String name;
    private String director;
    private String actor;
    private String releaseDate;
    private double price;
    private int remainingSeats;

    public Movie(String name, String director, String actor, String releaseDate, double price, int remainingSeats) {
        this.name = name;
        this.director = director;
        this.actor = actor;
        this.releaseDate = releaseDate;
        this.price = price;
        this.remainingSeats = remainingSeats;
    }

    public String getName() {
        return name;
    }

    public String getDirector() {
        return director;
    }

    public String getActor() {
        return actor;
    }

    public String getReleaseDate() {
        return releaseDate;
    }

    public double getPrice() {
        return price;
    }

    public int getRemainingSeats() {
        return remainingSeats;
    }

    public void setRemainingSeats(int remainingSeats) {
        this.remainingSeats = remainingSeats;
    }
}

User.java：

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;

    private String username;
    private String password;

    public User(String username, String password) {
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public String getPassword() {
        return password;
    }
}

Ticket.java：

import java.io.Serializable;

public class Ticket implements Serializable {
    private static final long serialVersionUID = 1L;

    private String movieName;
    private int quantity;
    private double totalPrice;

    public Ticket(String movieName, int quantity, double totalPrice) {
        this.movieName = movieName;
        this.quantity = quantity;
        this.totalPrice = totalPrice;
    }

    public String getMovieName() {
        return movieName;
    }

    public int getQuantity() {
        return quantity;
    }

    public double getTotalPrice() {
        return totalPrice;
    }
}

MovieTicketSystem.java：

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class MovieTicketSystem {
    private static final String MOVIE_FILE = "movies.dat";
    private static final String USER_FILE = "users.dat";
    private static final String TICKET_FILE = "tickets.dat";

    private List<Movie> movies;
    private List<User> users;
    private List<Ticket> tickets;

    private Scanner scanner;

    public MovieTicketSystem() {
        this.movies = new ArrayList<>();
        this.users = new ArrayList<>();
        this.tickets = new ArrayList<>();
        this.scanner = new Scanner(System.in);
    }

    public void run() {
        loadMovies();
        loadUsers();
        loadTickets();

        User user = login();
        if (user == null) {
            System.out.println("登录失败！");
            return;
        }

        System.out.println("欢迎 " + user.getUsername());

        while (true) {
            System.out.println("电影列表如下：");
            for (int i = 0; i < movies.size(); i++) {
                Movie movie = movies.get(i);
                System.out.println((i + 1) + ". " + movie.getName() + "（导演：" + movie.getDirector() + "，主演：" + movie.getActor() + "，上映时间：" + movie.getReleaseDate() + "，票价：" + movie.getPrice() + "元，余票：" + movie.getRemainingSeats() + "张）");
            }

            System.out.print("请选择要购买的电影序号（输入0退出）：");
            int movieIndex = scanner.nextInt();
            if (movieIndex == 0) {
                break;
            }

            System.out.print("请选择要购买的电影票数量：");
            int quantity = scanner.nextInt();

            Movie movie = movies.get(movieIndex - 1);
            if (movie.getRemainingSeats() < quantity) {
                System.out.println("余票不足！");
                continue;
            }

            double totalPrice = quantity * movie.getPrice();
            System.out.println("您选择购买的是 " + movie.getName() + "，数量为 " + quantity + "，总价为 " + totalPrice + "元。");

            System.out.print("是否确认购买（y/n）：");
            String confirm = scanner.next();
            if (!confirm.equalsIgnoreCase("y")) {
                continue;
            }

            Ticket ticket = new Ticket(movie.getName(), quantity, totalPrice);
            tickets.add(ticket);

            movie.setRemainingSeats(movie.getRemainingSeats() - quantity);

            saveTickets();

            System.out.println("购买成功！");
        }

        scanner.close();
    }

    private void loadMovies() {
        try (ObjectInputStream in = new ObjectInputStream(new FileInputStream(MOVIE_FILE))) {
            this.movies = (List<Movie>) in.readObject();
        } catch (IOException | ClassNotFoundException e) {
            System.out.println("读取电影列表失败！");
        }
    }

    private void loadUsers() {
        try (ObjectInputStream in = new ObjectInputStream(new FileInputStream(USER_FILE))) {
            this.users = (List<User>) in.readObject();
        } catch (IOException | ClassNotFoundException e) {
            System.out.println("读取用户列表失败！");
        }
    }

    private void loadTickets() {
        try (ObjectInputStream in = new ObjectInputStream(new FileInputStream(TICKET_FILE))) {
            this.tickets = (List<Ticket>) in.readObject();
        } catch (IOException | ClassNotFoundException e) {
            System.out.println("读取购票列表失败！");
        }
    }

    private void saveTickets() {
        try (ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(TICKET_FILE))) {
            out.writeObject(tickets);
        } catch (IOException e) {
            System.out.println("保存购票记录失败！");
        }
    }

    private User login() {
        System.out.print("请输入用户名：");
        String username = scanner.next();
        System.out.print("请输入密码：");
        String password = scanner.next();

        for (User user : users) {
            if (user.getUsername().equals(username) && user.getPassword().equals(password)) {
                return user;
            }
        }

        return null;
    }

    public static void main(String[] args) {
        new MovieTicketSystem().run();
    }
}

该电影购票系统使用了三个文件来存储电影列表、用户列表和购票记录，分别为movies.dat、users.dat和tickets.dat。在程序运行时，会先读取这三个文件中的数据，然后让用户输入用户名和密码进行登录。如果登录成功，程序会显示电影列表，让用户选择要购买的电影和数量，并计算总价。如果确认购买，程序会将购买信息写入tickets.dat文件，并更新movies.dat文件中对应电影的余票数量。