实验四

实验四/AnimatedMovie.java

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+public class AnimatedMovie extends Movie {
+    private String studio;
+
+    public AnimatedMovie(String title, int year, double rating, String genre, String studio) {
+        super(title, year, rating, genre);
+        this.studio = studio;
+    }
+
+    @Override
+    public void play() {
+        System.out.println("动画电影播放：" + getTitle() + "，制作公司：" + studio);
+    }
+}

实验四/BaseMovieCrawler.java

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+import org.jsoup.nodes.Element;
+import java.util.List;
+
+public abstract class BaseMovieCrawler implements MovieCrawlerInterface {
+    public abstract List<Movie> crawl(int limit);
+
+    // 只保留带两个参数的抽象方法
+    protected abstract Movie parseMovie(Element element, String type);
+}

实验四/DouyinMovie.java

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+public class DouyinMovie extends Movie {
+    private String hotValue;
+
+    public DouyinMovie(String title, int year, double rating, String genre, String hotValue) {
+        super(title, year, rating, genre);
+        this.hotValue = hotValue;
+    }
+
+    @Override
+    public void play() {
+        System.out.println("抖音视频：" + getTitle() + "，热度：" + hotValue);
+    }
+}

实验四/Main.java

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+import java.util.List;
+
+public class Main {
+    public static void main(String[] args) {
+        MovieCrawler crawler = new MovieCrawler();
+        List<Movie> list = crawler.crawl(2); // 每个网站爬2条
+
+        for (Movie m : list) {
+            m.play();
+        }
+    }
+}

实验四/Movie.java

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+public abstract class Movie implements MoviePlayable {
+    private String title;
+    private int year;
+    private double rating;
+    private String genre;
+
+    public Movie(String title, int year, double rating, String genre) {
+        this.title = title;
+        this.year = year;
+        this.rating = rating;
+        this.genre = genre;
+    }
+
+    // 接口方法，留给子类实现
+    @Override
+    public abstract void play();
+
+    // getter
+    public String getTitle() { return title; }
+    public int getYear() { return year; }
+    public double getRating() { return rating; }
+    public String getGenre() { return genre; }
+}

实验四/MovieCrawler.java

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+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+import org.jsoup.select.Elements;
+import java.util.ArrayList;
+import java.util.List;
+
+public class MovieCrawler extends BaseMovieCrawler {
+
+    private static final String DOUBAN_URL = "https://movie.douban.com/top250?start=0";
+    private static final String XIAOHONGSHU_URL = "https://www.xiaohongshu.com";
+    private static final String DOUYIN_URL = "https://www.douyin.com";
+
+    @Override
+    public List<Movie> crawl(int limit) {
+        List<Movie> list = new ArrayList<>();
+        list.addAll(crawlByType(DOUBAN_URL, "douban", limit));
+        list.addAll(crawlByType(XIAOHONGSHU_URL, "xiaohongshu", limit));
+        list.addAll(crawlByType(DOUYIN_URL, "douyin", limit));
+        return list;
+    }
+
+    private List<Movie> crawlByType(String url, String type, int limit) {
+        List<Movie> res = new ArrayList<>();
+        try {
+            Document doc = Jsoup.connect(url)
+                    .userAgent("Mozilla/5.0")
+                    .timeout(10000)
+                    .get();
+
+            Elements items = doc.select(".item");
+            if (items.isEmpty()) items = doc.select("div");
+
+            int count = 0;
+            for (Element e : items) {
+                if (count >= limit) break;
+                Movie m = parseMovie(e, type);
+                if (m != null) {
+                    res.add(m);
+                    count++;
+                }
+            }
+        } catch (Exception ex) {
+            System.out.println(type + " 抓取失败（反爬保护），已跳过");
+        }
+        return res;
+    }
+
+    @Override
+    protected Movie parseMovie(Element element, String type) {
+        try {
+            if (type.equals("douban")) {
+                String title = element.select(".hd .title").first().text();
+                double rating = Double.parseDouble(element.select(".rating_num").first().text());
+                return new TheatreMovie(title, 2024, rating, "电影", 49.9);
+            }
+
+            if (type.equals("xiaohongshu")) {
+                String title = element.select("h2").first().text();
+                // 改成你真实的类名 Xiaohongshu
+                return new XiaohongshuMovie(title, 2024, 9.2, "笔记", "小红书用户");
+            }
+
+            if (type.equals("douyin")) {
+                String title = element.select("h3").first().text();
+                // 改成你真实的类名 Douyin
+                return new DouyinMovie(title, 2024, 9.5, "视频", "100w+");
+            }
+        } catch (Exception e) {
+            return null;
+        }
+        return null;
+    }
+}

实验四/MovieCrawlerInterface.java

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+import java.util.List;
+
+public interface MovieCrawlerInterface {
+    List<Movie> crawl(int limit);
+}

实验四/MoviePlayable.java

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+public interface MoviePlayable {
+    void play();
+}

实验四/TheatreMovie.java

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+public class TheatreMovie extends Movie {
+    private double price;
+
+    public TheatreMovie(String title, int year, double rating, String genre, double price) {
+        super(title, year, rating, genre);
+        this.price = price;
+    }
+
+    @Override
+    public void play() {
+        System.out.println("院线电影播放：" + getTitle() + "，票价：" + price);
+    }
+}

实验四/XiaohongshuMovie.java

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+public class XiaohongshuMovie extends Movie {
+    private String author;
+
+    public XiaohongshuMovie(String title, int year, double rating, String genre, String author) {
+        super(title, year, rating, genre);
+        this.author = author;
+    }
+
+    @Override
+    public void play() {
+        System.out.println("小红书笔记：" + getTitle() + "，作者：" + author);
+    }
+}