Java如何开发一个简易的电影收藏管理系统

public class Movie {
    private String title;
    private String director;
    private int year;
    private double rating;
<pre class='brush:java;toolbar:false;'>public Movie(String title, String director, int year, double rating) {
    this.title = title;
    this.director = director;
    this.year = year;
    this.rating = rating;
}

// Getter 方法
public String getTitle() { return title; }
public String getDirector() { return director; }
public int getYear() { return year; }
public double getRating() { return rating; }

@Override
public String toString() {
    return "《" + title + "》 导演：" + director + " 年份：" + year + " 评分：" + rating;
}

import java.util.*;
<p>public class MovieManager {
private List<Movie> movies = new ArrayList<>();
private final String FILE_NAME = "movies.txt";</p><pre class='brush:java;toolbar:false;'>public void addMovie(Movie movie) {
    movies.add(movie);
}

public void viewAllMovies() {
    if (movies.isEmpty()) {
        System.out.println("暂无收藏电影。");
    } else {
        for (int i = 0; i < movies.size(); i++) {
            System.out.println((i + 1) + ". " + movies.get(i));
        }
    }
}

public List<Movie> searchByTitle(String keyword) {
    List<Movie> result = new ArrayList<>();
    for (Movie m : movies) {
        if (m.getTitle().toLowerCase().contains(keyword.toLowerCase())) {
            result.add(m);
        }
    }
    return result;
}

public boolean deleteMovie(String title) {
    Iterator<Movie> it = movies.iterator();
    while (it.hasNext()) {
        if (it.next().getTitle().equalsIgnoreCase(title)) {
            it.remove();
            return true;
        }
    }
    return false;
}

public void saveToFile() {
    try (PrintWriter out = new PrintWriter(FILE_NAME)) {
        for (Movie m : movies) {
            out.println(m.getTitle() + "," + m.getDirector() + "," + m.getYear() + "," + m.getRating());
        }
        System.out.println("数据已保存到 " + FILE_NAME);
    } catch (Exception e) {
        System.out.println("保存失败：" + e.getMessage());
    }
}

public void loadFromFile() {
    File file = new File(FILE_NAME);
    if (!file.exists()) return;

    try (Scanner scanner = new Scanner(file)) {
        while (scanner.hasNextLine()) {
            String line = scanner.nextLine();
            String[] parts = line.split(",");
            if (parts.length == 4) {
                String title = parts[0];
                String director = parts[1];
                int year = Integer.parseInt(parts[2]);
                double rating = Double.parseDouble(parts[3]);
                movies.add(new Movie(title, director, year, rating));
            }
        }
        System.out.println("已从 " + FILE_NAME + " 加载 " + movies.size() + " 部电影。");
    } catch (Exception e) {
        System.out.println("读取数据失败：" + e.getMessage());
    }
}

import java.util.Scanner;
<p>public class MovieCollectionApp {
public static void main(String[] args) {
MovieManager manager = new MovieManager();
Scanner input = new Scanner(System.in);
manager.loadFromFile(); // 启动时加载数据</p><pre class='brush:java;toolbar:false;'>    while (true) {
        System.out.println("\n=== 电影收藏管理系统 ===");
        System.out.println("1. 添加电影");
        System.out.println("2. 查看所有电影");
        System.out.println("3. 搜索电影");
        System.out.println("4. 删除电影");
        System.out.println("5. 保存并退出");
        System.out.print("请选择操作：");

        int choice = input.nextInt();
        input.nextLine(); // 消费换行符

        switch (choice) {
            case 1:
                System.out.print("片名："); String title = input.nextLine();
                System.out.print("导演："); String director = input.nextLine();
                System.out.print("年份："); int year = input.nextInt();
                System.out.print("评分（0-10）："); double rating = input.nextDouble();
                input.nextLine();
                manager.addMovie(new Movie(title, director, year, rating));
                System.out.println("电影已添加！");
                break;

            case 2:
                manager.viewAllMovies();
                break;

            case 3:
                System.out.print("请输入片名关键词：");
                String keyword = input.nextLine();
                List<Movie> results = manager.searchByTitle(keyword);
                if (results.isEmpty()) {
                    System.out.println("未找到相关电影。");
                } else {
                    System.out.println("找到 " + results.size() + " 部电影：");
                    for (Movie m : results) {
                        System.out.println(" - " + m);
                    }
                }
                break;

            case 4:
                System.out.print("请输入要删除的电影名称：");
                String delTitle = input.nextLine();
                if (manager.deleteMovie(delTitle)) {
                    System.out.println("删除成功！");
                } else {
                    System.out.println("未找到该电影！");
                }
                break;

            case 5:
                manager.saveToFile();
                System.out.println("再见！");
                input.close();
                return;

            default:
                System.out.println("无效选择，请重试。");
        }
    }
}