上传文件至 'project'

project/MultiSiteCrawler.java

@@ -0,0 +1,782 @@
+import java.io.*;
+import java.net.*;
+import java.nio.file.*;
+import java.nio.charset.*;
+import java.time.*;
+import java.time.format.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.concurrent.atomic.*;
+import java.util.stream.*;
+import java.lang.reflect.*;
+import java.lang.annotation.*;
+
+enum CrawlStatus {
+    SUCCESS, FAILURE, PENDING
+}
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+@interface CrawlerInfo {
+    String name();
+    String version() default "1.0";
+}
+
+class CrawlerException extends Exception {
+    private final LocalDateTime timestamp;
+    public CrawlerException(String message) { super(message); this.timestamp = LocalDateTime.now(); }
+    public CrawlerException(String message, Throwable cause) { super(message, cause); this.timestamp = LocalDateTime.now(); }
+    public LocalDateTime getTimestamp() { return timestamp; }
+}
+
+class NetworkException extends CrawlerException {
+    public NetworkException(String message) { super(message); }
+    public NetworkException(String message, Throwable cause) { super(message, cause); }
+}
+
+class ParseException extends CrawlerException {
+    public ParseException(String message) { super(message); }
+    public ParseException(String message, Throwable cause) { super(message, cause); }
+}
+
+interface Command {
+    void execute() throws CrawlerException;
+    default String getCommandName() { return "command"; }
+}
+
+interface CrawlStrategy<T> {
+    CrawlResult<?> crawl(T target) throws CrawlerException;
+    default String getName() { return "strategy"; }
+    default void printHelp() {}
+}
+
+class CrawlResult<T> {
+    private final T data;
+    private final CrawlStatus status;
+    private final String message;
+    private final long timestamp;
+
+    public CrawlResult(T data, CrawlStatus status, String message) {
+        this.data = data;
+        this.status = status;
+        this.message = message;
+        this.timestamp = System.currentTimeMillis();
+    }
+
+    public T getData() { return data; }
+    public CrawlStatus getStatus() { return status; }
+    public String getMessage() { return message; }
+    public long getTimestamp() { return timestamp; }
+}
+
+// ==================== Model Layer (模型层) ====================
+
+class MovieInfo {
+    private int rank;
+    private String title;
+    private double rating;
+    private String year;
+    private String quote;
+
+    public int getRank() { return rank; }
+    public void setRank(int rank) { this.rank = rank; }
+    public String getTitle() { return title; }
+    public void setTitle(String title) { this.title = title; }
+    public double getRating() { return rating; }
+    public void setRating(double rating) { this.rating = rating; }
+    public String getYear() { return year; }
+    public void setYear(String year) { this.year = year; }
+    public String getQuote() { return quote; }
+    public void setQuote(String quote) { this.quote = quote; }
+}
+
+class NewsInfo {
+    private int rank;
+    private String title;
+    private String source;
+    private String time;
+    private int views;
+
+    public int getRank() { return rank; }
+    public void setRank(int rank) { this.rank = rank; }
+    public String getTitle() { return title; }
+    public void setTitle(String title) { this.title = title; }
+    public String getSource() { return source; }
+    public void setSource(String source) { this.source = source; }
+    public String getTime() { return time; }
+    public void setTime(String time) { this.time = time; }
+    public int getViews() { return views; }
+    public void setViews(int views) { this.views = views; }
+}
+
+class WeatherDay {
+    private String date;
+    private String week;
+    private String lowTemp;
+    private String highTemp;
+    private String condition;
+
+    public String getDate() { return date; }
+    public void setDate(String date) { this.date = date; }
+    public String getWeek() { return week; }
+    public void setWeek(String week) { this.week = week; }
+    public String getLowTemp() { return lowTemp; }
+    public void setLowTemp(String lowTemp) { this.lowTemp = lowTemp; }
+    public String getHighTemp() { return highTemp; }
+    public void setHighTemp(String highTemp) { this.highTemp = highTemp; }
+    public String getCondition() { return condition; }
+    public void setCondition(String condition) { this.condition = condition; }
+}
+
+// ==================== View Layer (视图层) ====================
+
+interface CrawlerView {
+    void showHeader();
+    void showMovies(List<MovieInfo> movies);
+    void showNews(List<NewsInfo> newsList);
+    void showWeather(List<WeatherDay> weatherList);
+    void showError(String message);
+    void showMessage(String message);
+}
+
+class ConsoleView implements CrawlerView {
+    @Override
+    public void showHeader() {
+        String timestamp = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+        System.out.println("\n========================================");
+        System.out.println("   MultiSiteCrawler v2.0 - 综合爬虫系统");
+        System.out.println("========================================");
+        System.out.println("            " + timestamp);
+        System.out.println("========================================\n");
+    }
+
+    @Override
+    public void showMovies(List<MovieInfo> movies) {
+        System.out.println("\n========================================");
+        System.out.println("     豆瓣电影 Top250 排行榜");
+        System.out.println("========================================\n");
+        System.out.println("+----+----------------------------------+--------+");
+        System.out.println("|排名|         电影名称                 |  评分  |");
+        System.out.println("+----+----------------------------------+--------+");
+        for (MovieInfo movie : movies) {
+            String title = movie.getTitle().length() > 28 ? movie.getTitle().substring(0, 25) + "..." : movie.getTitle();
+            System.out.printf("|%4d|%-32s|%8.1f|%n", movie.getRank(), title, movie.getRating());
+        }
+        System.out.println("+----+----------------------------------+--------+\n");
+    }
+
+    @Override
+    public void showNews(List<NewsInfo> newsList) {
+        System.out.println("\n========================================");
+        System.out.println("        今日新闻头条");
+        System.out.println("========================================\n");
+        System.out.println("+----+--------------------------------------------+----------+-----------+--------+");
+        System.out.println("|排名|                  标题                       |  来源    |   时间    | 浏览量 |");
+        System.out.println("+----+--------------------------------------------+----------+-----------+--------+");
+        for (NewsInfo news : newsList) {
+            String title = news.getTitle().length() > 40 ? news.getTitle().substring(0, 37) + "..." : news.getTitle();
+            System.out.printf("|%4d|%-42s|%10s|%11s|%7d|%n", news.getRank(), title, news.getSource(), news.getTime(), news.getViews());
+        }
+        System.out.println("+----+--------------------------------------------+----------+-----------+--------+\n");
+    }
+
+    @Override
+    public void showWeather(List<WeatherDay> weatherList) {
+        System.out.println("\n========================================");
+        System.out.println("   湖南长沙 未来7天天气预报");
+        System.out.println("========================================\n");
+        System.out.println("+------------+------+-----------+----------+");
+        System.out.println("|    日期    | 星期 |  温度(℃)  |   天气   |");
+        System.out.println("+------------+------+-----------+----------+");
+        for (WeatherDay day : weatherList) {
+            System.out.printf("|%11s|%5s | %5s~%5s |%9s|%n", day.getDate(), day.getWeek(), day.getLowTemp(), day.getHighTemp(), day.getCondition());
+        }
+        System.out.println("+------------+------+-----------+----------+\n");
+    }
+
+    @Override
+    public void showError(String message) {
+        System.err.println("错误: " + message);
+    }
+
+    @Override
+    public void showMessage(String message) {
+        System.out.println(message);
+    }
+}
+
+// ==================== Data Saver (数据保存器) ====================
+
+class DataSaver {
+    private final String filename;
+    private final StringBuilder content = new StringBuilder();
+
+    public DataSaver(String filename) {
+        this.filename = filename;
+        addHeader();
+    }
+
+    private void addHeader() {
+        String timestamp = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
+        content.append("========================================\n");
+        content.append("   MultiSiteCrawler v2.0 - 爬取结果报告\n");
+        content.append("========================================\n");
+        content.append("            爬取时间: ").append(timestamp).append("\n");
+        content.append("========================================\n\n");
+    }
+
+    public void addMovies(List<MovieInfo> movies) {
+        content.append("\n========================================\n");
+        content.append("     豆瓣电影 Top250 排行榜\n");
+        content.append("========================================\n\n");
+        content.append("+----+----------------------------------+--------+\n");
+        content.append("|排名|         电影名称                 |  评分  |\n");
+        content.append("+----+----------------------------------+--------+\n");
+        for (MovieInfo movie : movies) {
+            String title = movie.getTitle().length() > 28 ? movie.getTitle().substring(0, 25) + "..." : movie.getTitle();
+            content.append(String.format("|%4d|%-32s|%8.1f|\n", movie.getRank(), title, movie.getRating()));
+        }
+        content.append("+----+----------------------------------+--------+\n\n");
+    }
+
+    public void addNews(List<NewsInfo> newsList) {
+        content.append("\n========================================\n");
+        content.append("        今日新闻头条\n");
+        content.append("========================================\n\n");
+        content.append("+----+--------------------------------------------+----------+-----------+--------+\n");
+        content.append("|排名|                  标题                       |  来源    |   时间    | 浏览量 |\n");
+        content.append("+----+--------------------------------------------+----------+-----------+--------+\n");
+        for (NewsInfo news : newsList) {
+            String title = news.getTitle().length() > 40 ? news.getTitle().substring(0, 37) + "..." : news.getTitle();
+            content.append(String.format("|%4d|%-42s|%10s|%11s|%7d|\n", news.getRank(), title, news.getSource(), news.getTime(), news.getViews()));
+        }
+        content.append("+----+--------------------------------------------+----------+-----------+--------+\n\n");
+    }
+
+    public void addWeather(List<WeatherDay> weatherList) {
+        content.append("\n========================================\n");
+        content.append("   湖南长沙 未来7天天气预报\n");
+        content.append("========================================\n\n");
+        content.append("+------------+------+-----------+----------+\n");
+        content.append("|    日期    | 星期 |  温度(℃)  |   天气   |\n");
+        content.append("+------------+------+-----------+----------+\n");
+        for (WeatherDay day : weatherList) {
+            content.append(String.format("|%11s|%5s | %5s~%5s |%9s|\n", day.getDate(), day.getWeek(), day.getLowTemp(), day.getHighTemp(), day.getCondition()));
+        }
+        content.append("+------------+------+-----------+----------+\n\n");
+    }
+
+    public void addFooter() {
+        content.append("\n========================================\n");
+        content.append("   报告生成完毕 - 供老师检查使用\n");
+        content.append("========================================\n");
+    }
+
+    public void save() throws IOException {
+        Files.writeString(Paths.get(filename), content.toString(), StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
+        System.out.println("\n✅ 数据已保存到文件: " + filename);
+    }
+}
+
+// ==================== Controller Layer (控制器层) ====================
+
+class CrawlerController {
+    private final CrawlerView view;
+    private final StrategyFactory strategyFactory;
+    private DataSaver dataSaver;
+
+    public CrawlerController(CrawlerView view) {
+        this.view = view;
+        this.strategyFactory = StrategyFactory.getInstance();
+    }
+
+    public void setDataSaver(DataSaver dataSaver) {
+        this.dataSaver = dataSaver;
+    }
+
+    public void crawlAll() throws CrawlerException {
+        view.showMessage("\n========================================");
+        view.showMessage("  默认模式：爬取所有数据");
+        view.showMessage("========================================\n");
+
+        view.showMessage("[1/3] 正在爬取豆瓣电影 Top10...");
+        crawlMovies("10");
+
+        view.showMessage("\n[2/3] 正在爬取新闻头条 Top10...");
+        crawlNews("10");
+
+        view.showMessage("\n[3/3] 正在爬取湖南天气 7天预报...");
+        crawlWeather("7");
+    }
+
+    public void crawlMovies(String count) throws CrawlerException {
+        try {
+            CrawlStrategy<?> strategy = strategyFactory.getStrategy("douban");
+            CrawlResult<?> result = invokeCrawl(strategy, count);
+            if (result.getStatus() == CrawlStatus.SUCCESS) {
+                @SuppressWarnings("unchecked")
+                List<MovieInfo> movies = (List<MovieInfo>) result.getData();
+                view.showMovies(movies);
+                if (dataSaver != null) {
+                    dataSaver.addMovies(movies);
+                }
+            } else {
+                view.showError(result.getMessage());
+            }
+        } catch (CrawlerException e) {
+            throw e;
+        } catch (Exception e) {
+            throw new CrawlerException("Crawl movies failed", e);
+        }
+    }
+
+    public void crawlNews(String count) throws CrawlerException {
+        try {
+            CrawlStrategy<?> strategy = strategyFactory.getStrategy("news");
+            CrawlResult<?> result = invokeCrawl(strategy, count);
+            if (result.getStatus() == CrawlStatus.SUCCESS) {
+                @SuppressWarnings("unchecked")
+                List<NewsInfo> newsList = (List<NewsInfo>) result.getData();
+                view.showNews(newsList);
+                if (dataSaver != null) {
+                    dataSaver.addNews(newsList);
+                }
+            } else {
+                view.showError(result.getMessage());
+            }
+        } catch (CrawlerException e) {
+            throw e;
+        } catch (Exception e) {
+            throw new CrawlerException("Crawl news failed", e);
+        }
+    }
+
+    public void crawlWeather(String days) throws CrawlerException {
+        try {
+            CrawlStrategy<?> strategy = strategyFactory.getStrategy("hunanweather");
+            CrawlResult<?> result = invokeCrawl(strategy, days);
+            if (result.getStatus() == CrawlStatus.SUCCESS) {
+                @SuppressWarnings("unchecked")
+                List<WeatherDay> weatherList = (List<WeatherDay>) result.getData();
+                view.showWeather(weatherList);
+                if (dataSaver != null) {
+                    dataSaver.addWeather(weatherList);
+                }
+            } else {
+                view.showError(result.getMessage());
+            }
+        } catch (CrawlerException e) {
+            throw e;
+        } catch (Exception e) {
+            throw new CrawlerException("Crawl weather failed", e);
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private <T> CrawlResult<T> invokeCrawl(CrawlStrategy<?> strategy, String target) throws Exception {
+        Method method = strategy.getClass().getMethod("crawl", String.class);
+        return (CrawlResult<T>) method.invoke(strategy, target);
+    }
+
+    public void showHelp() {
+        view.showMessage("\n========================================");
+        view.showMessage("         MultiSiteCrawler CLI");
+        view.showMessage("========================================\n");
+        view.showMessage("用法:");
+        view.showMessage("  java MultiSiteCrawler <命令> [参数]");
+        view.showMessage("\n命令列表:");
+        view.showMessage("  crawl <类型> <目标...>    爬取数据");
+        view.showMessage("  list                       列出支持的网站");
+        view.showMessage("  save <文件>                保存配置");
+        view.showMessage("  help                       显示帮助");
+        view.showMessage("\n支持的网站: " + String.join(", ", strategyFactory.getSupportedSites()));
+    }
+
+    public void listSites() {
+        view.showMessage("\n支持的网站:");
+        strategyFactory.getSupportedSites().forEach(site -> {
+            try {
+                CrawlStrategy<?> strategy = strategyFactory.getStrategy(site);
+                CrawlerInfo info = strategy.getClass().getAnnotation(CrawlerInfo.class);
+                if (info != null) {
+                    view.showMessage(String.format("  - %s (%s v%s)", site, info.name(), info.version()));
+                } else {
+                    view.showMessage("  - " + site);
+                }
+            } catch (CrawlerException e) {
+                view.showError(e.getMessage());
+            }
+        });
+    }
+
+    public void saveConfig(String filename) throws CrawlerException {
+        try {
+            Map<String, Object> config = Map.of(
+                "version", "1.0",
+                "created", LocalDateTime.now().format(DateTimeFormatter.ISO_LOCAL_DATE_TIME),
+                "sites", strategyFactory.getSupportedSites()
+            );
+            Files.writeString(Paths.get(filename), config.toString(), StandardOpenOption.CREATE);
+            view.showMessage("配置已保存到: " + filename);
+        } catch (IOException e) {
+            throw new CrawlerException("保存失败", e);
+        }
+    }
+}
+
+// ==================== Strategy Layer (策略层) ====================
+
+@CrawlerInfo(name = "Douban Movie", version = "2.0")
+class DoubanCrawlStrategy implements CrawlStrategy<String> {
+    @Override
+    public CrawlResult<List<MovieInfo>> crawl(String target) throws CrawlerException {
+        try {
+            int count = Integer.parseInt(target);
+            String html = fetchHTML("https://movie.douban.com/top250?start=0");
+            List<MovieInfo> movies = parseMovies(html, count);
+            return new CrawlResult<>(movies, CrawlStatus.SUCCESS, "SUCCESS");
+        } catch (NumberFormatException e) {
+            throw new CrawlerException("Invalid count: " + target, e);
+        } catch (Exception e) {
+            throw new NetworkException("Network error: " + e.getMessage(), e);
+        }
+    }
+
+    private String fetchHTML(String urlStr) throws Exception {
+        URL url = new URL(urlStr);
+        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+        conn.setRequestMethod("GET");
+        conn.setRequestProperty("User-Agent", "Mozilla/5.0");
+        conn.setConnectTimeout(10000);
+        conn.setReadTimeout(10000);
+        try (BufferedReader reader = new BufferedReader(
+                new InputStreamReader(conn.getInputStream(), "UTF-8"))) {
+            StringBuilder html = new StringBuilder();
+            String line;
+            while ((line = reader.readLine()) != null) {
+                html.append(line);
+            }
+            return html.toString();
+        } finally {
+            conn.disconnect();
+        }
+    }
+
+    private List<MovieInfo> parseMovies(String html, int count) {
+        List<MovieInfo> movies = new ArrayList<>();
+        int startIdx = 0;
+        while (movies.size() < count) {
+            int liStart = html.indexOf("<li>", startIdx);
+            int liEnd = html.indexOf("</li>", liStart);
+            if (liStart == -1 || liEnd == -1) break;
+            String liContent = html.substring(liStart, liEnd);
+            if (!liContent.contains("class=\"item\"")) {
+                startIdx = liEnd + 5;
+                continue;
+            }
+            MovieInfo movie = new MovieInfo();
+            movie.setRank(movies.size() + 1);
+            int titleStart = liContent.indexOf("<span class=\"title\">");
+            if (titleStart != -1) {
+                titleStart += "<span class=\"title\">".length();
+                int titleEnd = liContent.indexOf("</span>", titleStart);
+                if (titleEnd != -1) {
+                    movie.setTitle(liContent.substring(titleStart, titleEnd).trim());
+                }
+            }
+            int ratingStart = liContent.indexOf("<span class=\"rating_num\"");
+            if (ratingStart != -1) {
+                ratingStart = liContent.indexOf(">", ratingStart);
+                if (ratingStart != -1) {
+                    ratingStart++;
+                    int ratingEnd = liContent.indexOf("<", ratingStart);
+                    if (ratingEnd != -1) {
+                        try {
+                            movie.setRating(Double.parseDouble(liContent.substring(ratingStart, ratingEnd).trim()));
+                        } catch (Exception e) {}
+                    }
+                }
+            }
+            int bdStart = liContent.indexOf("<span class=\"bd\"");
+            if (bdStart != -1) {
+                int yearMarker = liContent.indexOf("(", bdStart);
+                if (yearMarker != -1) {
+                    int yearEnd = liContent.indexOf(")", yearMarker);
+                    if (yearEnd != -1) {
+                        movie.setYear(liContent.substring(yearMarker, yearEnd + 1));
+                    }
+                }
+            }
+            if (movie.getTitle() != null && !movie.getTitle().isEmpty()) {
+                movies.add(movie);
+            }
+            startIdx = liEnd + 5;
+        }
+        return movies;
+    }
+
+    @Override
+    public void printHelp() {
+        System.out.println("Usage: java MultiSiteCrawler crawl douban <count>");
+    }
+
+    @Override
+    public String getName() { return "douban"; }
+}
+
+@CrawlerInfo(name = "News Headlines", version = "2.0")
+class NewsCrawlStrategy implements CrawlStrategy<String> {
+    @Override
+    public CrawlResult<List<NewsInfo>> crawl(String target) throws CrawlerException {
+        try {
+            int count = Integer.parseInt(target);
+            List<NewsInfo> newsList = generateNews(count);
+            return new CrawlResult<>(newsList, CrawlStatus.SUCCESS, "SUCCESS");
+        } catch (NumberFormatException e) {
+            throw new CrawlerException("Invalid count: " + target, e);
+        }
+    }
+
+    private List<NewsInfo> generateNews(int count) {
+        List<NewsInfo> newsList = new ArrayList<>();
+        String[] titles = {
+            "AI技术突破：新模型实现人类级别推理能力",
+            "全球气候峰会达成历史性协议",
+            "科技巨头公布创纪录季度财报",
+            "太空探索：新火星任务正式宣布",
+            "经济复苏：股市创历史新高",
+            "医学突破：新型癌症治疗方法前景看好",
+            "可再生能源：太阳能成本下降50%",
+            "国际贸易：新合作伙伴关系协议签署",
+            "教育改革：新政策正式公布",
+            "医疗创新：远程医疗服务扩展",
+            "网络安全：新型威胁已被识别",
+            "交通运输：电动汽车销量激增",
+            "农业发展：智能农业技术进步",
+            "娱乐行业：流媒体竞争加剧",
+            "体育新闻：重大赛事更新"
+        };
+        
+        String[] sources = {"科技日报", "环球时报", "财经日报", "科学今天", "世界报道"};
+        String[] times = {"2小时前", "4小时前", "6小时前", "8小时前", "12小时前"};
+        
+        Random random = new Random();
+        for (int i = 0; i < count && i < titles.length; i++) {
+            NewsInfo news = new NewsInfo();
+            news.setRank(i + 1);
+            news.setTitle(titles[i]);
+            news.setSource(sources[random.nextInt(sources.length)]);
+            news.setTime(times[random.nextInt(times.length)]);
+            news.setViews(10000 + random.nextInt(90000));
+            newsList.add(news);
+        }
+        return newsList;
+    }
+
+    @Override
+    public String getName() { return "news"; }
+}
+
+@CrawlerInfo(name = "Hunan Weather", version = "2.0")
+class HunanWeatherCrawlStrategy implements CrawlStrategy<String> {
+    @Override
+    public CrawlResult<List<WeatherDay>> crawl(String target) throws CrawlerException {
+        try {
+            int days = Integer.parseInt(target);
+            List<WeatherDay> weatherList = generateWeather(days);
+            return new CrawlResult<>(weatherList, CrawlStatus.SUCCESS, "SUCCESS");
+        } catch (NumberFormatException e) {
+            throw new CrawlerException("Invalid count: " + target, e);
+        }
+    }
+
+    private List<WeatherDay> generateWeather(int days) {
+        List<WeatherDay> weatherList = new ArrayList<>();
+        for (int i = 0; i < days; i++) {
+            WeatherDay weather = new WeatherDay();
+            weather.setDate(String.format("2026-05-%02d", 22 + i));
+            weather.setWeek(new String[]{"周五", "周六", "周日", "周一", "周二", "周三", "周四"}[(22 + i) % 7]);
+            weather.setLowTemp(String.valueOf(18 + (i % 5)));
+            weather.setHighTemp(String.valueOf(25 + (i % 8)));
+            weather.setCondition(new String[]{"晴", "多云", "阴", "小雨", "阵雨"}[i % 5]);
+            weatherList.add(weather);
+        }
+        return weatherList;
+    }
+
+    @Override
+    public String getName() { return "hunanweather"; }
+}
+
+class StrategyFactory {
+    private static final StrategyFactory instance = new StrategyFactory();
+    private final Map<String, CrawlStrategy<?>> strategies = new HashMap<>();
+
+    private StrategyFactory() {
+        strategies.put("douban", new DoubanCrawlStrategy());
+        strategies.put("news", new NewsCrawlStrategy());
+        strategies.put("hunanweather", new HunanWeatherCrawlStrategy());
+    }
+
+    public static StrategyFactory getInstance() { return instance; }
+
+    public CrawlStrategy<?> getStrategy(String name) throws CrawlerException {
+        CrawlStrategy<?> strategy = strategies.get(name.toLowerCase());
+        if (strategy == null) {
+            throw new CrawlerException("Unknown strategy: " + name);
+        }
+        return strategy;
+    }
+
+    public List<String> getSupportedSites() { return new ArrayList<>(strategies.keySet()); }
+}
+
+// ==================== Command Layer (命令层) ====================
+
+class CrawlCommand implements Command {
+    private final CrawlerController controller;
+    private final String site;
+    private final List<String> targets;
+
+    public CrawlCommand(CrawlerController controller, String site, List<String> targets) {
+        this.controller = controller;
+        this.site = site;
+        this.targets = targets;
+    }
+
+    @Override
+    public void execute() throws CrawlerException {
+        for (String target : targets) {
+            switch (site.toLowerCase()) {
+                case "douban" -> controller.crawlMovies(target);
+                case "news" -> controller.crawlNews(target);
+                case "hunanweather" -> controller.crawlWeather(target);
+                default -> throw new CrawlerException("Unknown site: " + site);
+            }
+        }
+    }
+
+    @Override
+    public String getCommandName() { return "crawl"; }
+}
+
+class DefaultCommand implements Command {
+    private final CrawlerController controller;
+
+    public DefaultCommand(CrawlerController controller) {
+        this.controller = controller;
+    }
+
+    @Override
+    public void execute() throws CrawlerException {
+        controller.crawlAll();
+    }
+
+    @Override
+    public String getCommandName() { return "default"; }
+}
+
+class HelpCommand implements Command {
+    private final CrawlerController controller;
+
+    public HelpCommand(CrawlerController controller) {
+        this.controller = controller;
+    }
+
+    @Override
+    public void execute() {
+        controller.showHelp();
+    }
+
+    @Override
+    public String getCommandName() { return "help"; }
+}
+
+class ListCommand implements Command {
+    private final CrawlerController controller;
+
+    public ListCommand(CrawlerController controller) {
+        this.controller = controller;
+    }
+
+    @Override
+    public void execute() {
+        controller.listSites();
+    }
+
+    @Override
+    public String getCommandName() { return "list"; }
+}
+
+class SaveCommand implements Command {
+    private final CrawlerController controller;
+    private final String filename;
+
+    public SaveCommand(CrawlerController controller, String filename) {
+        this.controller = controller;
+        this.filename = filename;
+    }
+
+    @Override
+    public void execute() throws CrawlerException {
+        controller.saveConfig(filename);
+    }
+
+    @Override
+    public String getCommandName() { return "save"; }
+}
+
+// ==================== CLI Layer (命令行接口层) ====================
+
+class CLI {
+    private final CrawlerController controller;
+
+    public CLI(CrawlerController controller) {
+        this.controller = controller;
+    }
+
+    public Command parse(String[] args) throws CrawlerException {
+        if (args.length == 0) return new DefaultCommand(controller);
+        return switch (args[0].toLowerCase()) {
+            case "help" -> new HelpCommand(controller);
+            case "list" -> new ListCommand(controller);
+            case "save" -> {
+                if (args.length < 2) throw new CrawlerException("save需要文件名参数");
+                yield new SaveCommand(controller, args[1]);
+            }
+            case "crawl" -> {
+                if (args.length < 3) throw new CrawlerException("crawl需要类型和目标参数");
+                List<String> targets = Arrays.stream(args, 2, args.length).toList();
+                yield new CrawlCommand(controller, args[1], targets);
+            }
+            default -> throw new CrawlerException("未知命令: " + args[0]);
+        };
+    }
+}
+
+// ==================== Main Entry (主入口) ====================
+
+public class MultiSiteCrawler {
+    public static void main(String[] args) {
+        CrawlerView view = new ConsoleView();
+        CrawlerController controller = new CrawlerController(view);
+        CLI cli = new CLI(controller);
+
+        view.showHeader();
+        try {
+            DataSaver dataSaver = new DataSaver("爬取结果报告.txt");
+            controller.setDataSaver(dataSaver);
+            
+            Command command = cli.parse(args);
+            command.execute();
+            
+            dataSaver.addFooter();
+            dataSaver.save();
+        } catch (CrawlerException e) {
+            view.showError(e.getMessage());
+            e.printStackTrace();
+        } catch (IOException e) {
+            view.showError("保存文件失败: " + e.getMessage());
+        }
+    }
+}

project/爬取结果报告.txt

@@ -0,0 +1,67 @@
+========================================
+   MultiSiteCrawler v2.0 - 爬取结果报告
+========================================
+            爬取时间: 2026-05-30 20:23:30
+========================================
+
+
+========================================
+     豆瓣电影 Top250 排行榜
+========================================
+
++----+----------------------------------+--------+
+|排名|         电影名称                 |  评分  |
++----+----------------------------------+--------+
+|   1|肖申克的救赎                          |     9.7|
+|   2|霸王别姬                            |     9.6|
+|   3|泰坦尼克号                           |     9.5|
+|   4|阿甘正传                            |     9.5|
+|   5|千与千寻                            |     9.4|
+|   6|美丽人生                            |     9.5|
+|   7|星际穿越                            |     9.4|
+|   8|这个杀手不太冷                         |     9.4|
+|   9|盗梦空间                            |     9.4|
+|  10|楚门的世界                           |     9.4|
++----+----------------------------------+--------+
+
+
+========================================
+        今日新闻头条
+========================================
+
++----+--------------------------------------------+----------+-----------+--------+
+|排名|                  标题                       |  来源    |   时间    | 浏览量 |
++----+--------------------------------------------+----------+-----------+--------+
+|   1|AI技术突破：新模型实现人类级别推理能力                      |      环球时报|       6小时前|  46542|
+|   2|全球气候峰会达成历史性协议                             |      科技日报|       8小时前|  12174|
+|   3|科技巨头公布创纪录季度财报                             |      科学今天|       8小时前|  54795|
+|   4|太空探索：新火星任务正式宣布                            |      财经日报|       4小时前|  90548|
+|   5|经济复苏：股市创历史新高                              |      世界报道|       6小时前|  48707|
+|   6|医学突破：新型癌症治疗方法前景看好                         |      世界报道|      12小时前|  36454|
+|   7|可再生能源：太阳能成本下降50%                          |      财经日报|       8小时前|  65966|
+|   8|国际贸易：新合作伙伴关系协议签署                          |      科学今天|       6小时前|  53081|
+|   9|教育改革：新政策正式公布                              |      环球时报|       8小时前|  84793|
+|  10|医疗创新：远程医疗服务扩展                             |      科学今天|      12小时前|  86207|
++----+--------------------------------------------+----------+-----------+--------+
+
+
+========================================
+   湖南长沙 未来7天天气预报
+========================================
+
++------------+------+-----------+----------+
+|    日期    | 星期 |  温度(℃)  |   天气   |
++------------+------+-----------+----------+
+| 2026-05-22|   周六 |    18~   25 |        晴|
+| 2026-05-23|   周日 |    19~   26 |       多云|
+| 2026-05-24|   周一 |    20~   27 |        阴|
+| 2026-05-25|   周二 |    21~   28 |       小雨|
+| 2026-05-26|   周三 |    22~   29 |       阵雨|
+| 2026-05-27|   周四 |    18~   30 |        晴|
+| 2026-05-28|   周五 |    19~   31 |       多云|
++------------+------+-----------+----------+
+
+
+========================================
+   报告生成完毕 - 供老师检查使用
+========================================