完成与远程main分支的合并

杨玉婷202401010417

Main.java

@@ -0,0 +1,27 @@
+public class Main {
+    public static void main(String[] args) {
+        int[] voltages = {10, -5, 7, 105, 999, 89, 76, 74};
+        int validCount = 0; // 有效数据个数
+        double validSum = 0; // 有效数据总和
+
+        for (int voltage : voltages) {
+            if (voltage == 999) {
+                System.out.println("程序终止，传感器离线");
+                break; // 遇到999，终止程序
+            } else if (voltage < 0) {
+                System.out.println("警告：发现负数，数据已跳过");
+            } else if (voltage >= 1 && voltage <= 100) {
+                validCount++;
+                validSum += voltage;
+            }
+            // 其他情况（如>100）不处理
+        }
+
+        if (validCount > 0) {
+            double average = validSum / validCount;
+            System.out.printf("有效数据个数：%d，平均值：%.2f\n", validCount, average);
+        } else {
+            System.out.println("没有收集到有效数据，打印初始状态");
+        }
+    }
+}

REMEAD2.md

@@ -0,0 +1,53 @@
+import java.util.Scanner;
+
+/**
+* 温度转换程序（与Python版本功能完全等效）
+* 输入格式：温度值 + 空格 + 单位（C/F），例如 36.6 C 或 97 F
+* 功能：实现摄氏温度↔华氏温度的相互转换
+  */
+  public class TemperatureConverter {
+  // 摄氏温度转换为华氏温度的核心方法
+  public static double celsiusToFahrenheit(double celsius) {
+  return celsius * 9.0 / 5.0 + 32;
+  }
+
+  // 华氏温度转换为摄氏温度的核心方法
+  public static double fahrenheitToCelsius(double fahrenheit) {
+  return (fahrenheit - 32) * 5.0 / 9.0;
+  }
+
+  // 程序主入口，处理输入和输出逻辑
+  public static void main(String[] args) {
+  // 创建Scanner对象接收用户输入
+  Scanner scanner = new Scanner(System.in);
+
+       // 提示语与你的Python程序完全一致
+       System.out.print("请输入要转换的温度与单位（例如 36.6 C 或 97 F）：");
+
+       // 读取温度值和单位（兼容空格分隔的输入格式）
+       double temperature;
+       String unit;
+       try {
+           temperature = scanner.nextDouble(); // 读取温度数值
+           unit = scanner.next().toUpperCase(); // 读取单位并统一转为大写（兼容小写输入）
+       } catch (Exception e) {
+           System.out.println("输入格式错误！请按示例格式输入（如：36.6 C）");
+           scanner.close();
+           return;
+       }
+
+       // 根据单位执行转换并输出结果
+       if (unit.equals("C")) {
+           double result = celsiusToFahrenheit(temperature);
+           System.out.printf("%.2f C = %.2f F%n", temperature, result);
+       } else if (unit.equals("F")) {
+           double result = fahrenheitToCelsius(temperature);
+           System.out.printf("%.2f F = %.2f C%n", temperature, result);
+       } else {
+           System.out.println("单位错误！仅支持 C（摄氏）或 F（华氏）");
+       }
+
+       // 关闭Scanner，释放资源
+       scanner.close();
+  }
+  }

TemperatureConverter.java

@@ -0,0 +1,53 @@
+import java.util.Scanner;
+
+/**
+ * 温度转换程序（与Python版本功能完全等效）
+ * 输入格式：温度值 + 空格 + 单位（C/F），例如 36.6 C 或 97 F
+ * 功能：实现摄氏温度↔华氏温度的相互转换
+ */
+public class TemperatureConverter {
+    // 摄氏温度转换为华氏温度的核心方法
+    public static double celsiusToFahrenheit(double celsius) {
+        return celsius * 9.0 / 5.0 + 32;
+    }
+
+    // 华氏温度转换为摄氏温度的核心方法
+    public static double fahrenheitToCelsius(double fahrenheit) {
+        return (fahrenheit - 32) * 5.0 / 9.0;
+    }
+
+    // 程序主入口，处理输入和输出逻辑
+    public static void main(String[] args) {
+        // 创建Scanner对象接收用户输入
+        Scanner scanner = new Scanner(System.in);
+
+        // 提示语与你的Python程序完全一致
+        System.out.print("请输入要转换的温度与单位（例如 36.6 C 或 97 F）：");
+
+        // 读取温度值和单位（兼容空格分隔的输入格式）
+        double temperature;
+        String unit;
+        try {
+            temperature = scanner.nextDouble(); // 读取温度数值
+            unit = scanner.next().toUpperCase(); // 读取单位并统一转为大写（兼容小写输入）
+        } catch (Exception e) {
+            System.out.println("输入格式错误！请按示例格式输入（如：36.6 C）");
+            scanner.close();
+            return;
+        }
+
+        // 根据单位执行转换并输出结果
+        if (unit.equals("C")) {
+            double result = celsiusToFahrenheit(temperature);
+            System.out.printf("%.2f C = %.2f F%n", temperature, result);
+        } else if (unit.equals("F")) {
+            double result = fahrenheitToCelsius(temperature);
+            System.out.printf("%.2f F = %.2f C%n", temperature, result);
+        } else {
+            System.out.println("单位错误！仅支持 C（摄氏）或 F（华氏）");
+        }
+
+        // 关闭Scanner，释放资源
+        scanner.close();
+    }
+}

W3/Main.java

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+import org.jfree.chart.ChartFactory;
+import org.jfree.chart.ChartUtils;
+import org.jfree.chart.JFreeChart;
+import org.jfree.data.category.DefaultCategoryDataset;
+import org.jfree.data.general.DefaultPieDataset;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.*;
+import java.util.stream.Collectors;
+
+public class Main {
+    public static void main(String[] args) {
+        try {
+            // 1. 爬取电影数据
+            MovieCrawler crawler = new MovieCrawler();
+            List<Movie> movies = crawler.crawlTopMovies(50); // 爬取50部电影
+            
+            // 2. 数据清洗
+            List<Movie> cleanedMovies = cleanData(movies);
+            
+            // 3. 数据存储
+            saveToCSV(cleanedMovies, "movies.csv");
+            
+            // 4. 数据分析
+            analyzeData(cleanedMovies);
+            
+            // 5. 结果展示
+            displayResults(cleanedMovies);
+            generateCharts(cleanedMovies);
+            
+            System.out.println("爬取完成！共获取了 " + cleanedMovies.size() + " 部电影数据。");
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    private static List<Movie> cleanData(List<Movie> movies) {
+        return movies.stream()
+                .map(movie -> {
+                    // 去空格
+                    movie.setTitle(movie.getTitle().trim());
+                    movie.setGenre(movie.getGenre().trim());
+                    movie.setDirector(movie.getDirector().trim());
+                    movie.setActors(movie.getActors().trim());
+                    movie.setSynopsis(movie.getSynopsis().trim());
+                    return movie;
+                })
+                .collect(Collectors.toList());
+    }
+
+    private static void saveToCSV(List<Movie> movies, String fileName) throws IOException {
+        try (FileWriter writer = new FileWriter(fileName)) {
+            // 写入表头
+            writer.write("Title,Year,Rating,Genre,Director,Actors,Synopsis\n");
+            
+            // 写入数据
+            for (Movie movie : movies) {
+                writer.write(String.format("%s,%d,%.1f,%s,%s,%s,%s\n",
+                        escapeCSV(movie.getTitle()),
+                        movie.getYear(),
+                        movie.getRating(),
+                        escapeCSV(movie.getGenre()),
+                        escapeCSV(movie.getDirector()),
+                        escapeCSV(movie.getActors()),
+                        escapeCSV(movie.getSynopsis())));
+            }
+        }
+    }
+
+    private static String escapeCSV(String value) {
+        if (value == null) return "";
+        if (value.contains(",") || value.contains("\n") || value.contains("\"")) {
+            value = value.replace("\"", "\"\"");
+            return "\"" + value + "\"";
+        }
+        return value;
+    }
+
+    private static void analyzeData(List<Movie> movies) {
+        System.out.println("\n=== 数据分析结果 ===");
+        
+        // 1. 评分分布
+        System.out.println("\n1. 评分分布：");
+        Map<Double, Long> ratingDistribution = movies.stream()
+                .collect(Collectors.groupingBy(Movie::getRating, Collectors.counting()));
+        ratingDistribution.entrySet().stream()
+                .sorted(Map.Entry.comparingByKey())
+                .forEach(entry -> System.out.printf("评分 %.1f: %d 部\n", entry.getKey(), entry.getValue()));
+        
+        // 2. 年份分布
+        System.out.println("\n2. 年份分布：");
+        Map<Integer, Long> yearDistribution = movies.stream()
+                .collect(Collectors.groupingBy(Movie::getYear, Collectors.counting()));
+        yearDistribution.entrySet().stream()
+                .sorted(Map.Entry.comparingByKey())
+                .forEach(entry -> System.out.printf("年份 %d: %d 部\n", entry.getKey(), entry.getValue()));
+        
+        // 3. 导演作品数排行
+        System.out.println("\n3. 导演作品数排行：");
+        Map<String, Long> directorCount = movies.stream()
+                .collect(Collectors.groupingBy(Movie::getDirector, Collectors.counting()));
+        directorCount.entrySet().stream()
+                .sorted(Map.Entry.<String, Long>comparingByValue().reversed())
+                .limit(10)
+                .forEach(entry -> System.out.printf("%s: %d 部\n", entry.getKey(), entry.getValue()));
+        
+        // 4. 平均评分
+        double averageRating = movies.stream()
+                .mapToDouble(Movie::getRating)
+                .average()
+                .orElse(0);
+        System.out.printf("\n4. 平均评分：%.2f\n", averageRating);
+    }
+
+    private static void displayResults(List<Movie> movies) {
+        System.out.println("\n=== 电影数据列表 ===");
+        System.out.printf("%-50s %-10s %-10s %-30s %-30s\n", "Title", "Year", "Rating", "Genre", "Director");
+        System.out.println("-------------------------------------------------------------------------------------------------------------------------------");
+        
+        for (Movie movie : movies) {
+            System.out.printf("%-50s %-10d %-10.1f %-30s %-30s\n", 
+                    truncate(movie.getTitle(), 50),
+                    movie.getYear(),
+                    movie.getRating(),
+                    truncate(movie.getGenre(), 30),
+                    truncate(movie.getDirector(), 30));
+        }
+    }
+
+    private static String truncate(String text, int maxLength) {
+        return text.length() > maxLength ? text.substring(0, maxLength - 3) + "..." : text;
+    }
+
+    private static void generateCharts(List<Movie> movies) throws IOException {
+        // 1. 评分分布饼图
+        DefaultPieDataset ratingDataset = new DefaultPieDataset();
+        Map<Double, Long> ratingDistribution = movies.stream()
+                .collect(Collectors.groupingBy(Movie::getRating, Collectors.counting()));
+        ratingDistribution.forEach((rating, count) -> ratingDataset.setValue(String.valueOf(rating), count));
+        
+        JFreeChart ratingChart = ChartFactory.createPieChart(
+                "电影评分分布",
+                ratingDataset,
+                true,
+                true,
+                false
+        );
+        ChartUtils.saveChartAsPNG(new File("rating_distribution.png"), ratingChart, 800, 600);
+        
+        // 2. 年份与评分关系图
+        DefaultCategoryDataset yearRatingDataset = new DefaultCategoryDataset();
+        Map<Integer, Double> yearAverageRating = movies.stream()
+                .collect(Collectors.groupingBy(Movie::getYear,
+                        Collectors.averagingDouble(Movie::getRating)));
+        yearAverageRating.forEach((year, avgRating) -> yearRatingDataset.addValue(avgRating, "评分", String.valueOf(year)));
+        
+        JFreeChart yearRatingChart = ChartFactory.createBarChart(
+                "年份与平均评分关系",
+                "年份",
+                "平均评分",
+                yearRatingDataset
+        );
+        ChartUtils.saveChartAsPNG(new File("year_rating_relation.png"), yearRatingChart, 800, 600);
+        
+        System.out.println("\n图表已生成：rating_distribution.png 和 year_rating_relation.png");
+    }
+}

W3/Movie.java

@@ -0,0 +1,89 @@
+public class Movie {
+    private String title;
+    private int year;
+    private double rating;
+    private String genre;
+    private String director;
+    private String actors;
+    private String synopsis;
+
+    public Movie() {
+    }
+
+    public Movie(String title, int year, double rating, String genre, String director, String actors, String synopsis) {
+        this.title = title;
+        this.year = year;
+        this.rating = rating;
+        this.genre = genre;
+        this.director = director;
+        this.actors = actors;
+        this.synopsis = synopsis;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public int getYear() {
+        return year;
+    }
+
+    public void setYear(int year) {
+        this.year = year;
+    }
+
+    public double getRating() {
+        return rating;
+    }
+
+    public void setRating(double rating) {
+        this.rating = rating;
+    }
+
+    public String getGenre() {
+        return genre;
+    }
+
+    public void setGenre(String genre) {
+        this.genre = genre;
+    }
+
+    public String getDirector() {
+        return director;
+    }
+
+    public void setDirector(String director) {
+        this.director = director;
+    }
+
+    public String getActors() {
+        return actors;
+    }
+
+    public void setActors(String actors) {
+        this.actors = actors;
+    }
+
+    public String getSynopsis() {
+        return synopsis;
+    }
+
+    public void setSynopsis(String synopsis) {
+        this.synopsis = synopsis;
+    }
+
+    @Override
+    public String toString() {
+        return "Movie{" +
+                "title='" + title + '\'' +
+                ", year=" + year +
+                ", rating=" + rating +
+                ", genre='" + genre + '\'' +
+                ", director='" + director + '\'' +
+                "}";
+    }
+}

W3/MovieCrawler.java

@@ -0,0 +1,141 @@
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+import org.jsoup.select.Elements;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class MovieCrawler {
+    private static final String BASE_URL = "https://movie.douban.com/top250";
+    private static final int DELAY_MS = 1000; // 控制请求频率
+
+    public List<Movie> crawlTopMovies(int limit) throws IOException {
+        List<Movie> movies = new ArrayList<>();
+        int page = 0;
+        
+        System.out.println("Starting to crawl movies...");
+        
+        while (movies.size() < limit) {
+            String url = BASE_URL + "?start=" + page * 25;
+            System.out.println("Crawling page: " + url);
+            
+            try {
+                Document doc = Jsoup.connect(url)
+                        .userAgent("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36")
+                        .timeout(10000)
+                        .get();
+                
+                // 打印页面标题，确认是否成功获取页面
+                System.out.println("Page title: " + doc.title());
+                
+                // 选择电影元素
+                Elements movieElements = doc.select(".item");
+                System.out.println("Found " + movieElements.size() + " movie elements");
+                
+                for (Element element : movieElements) {
+                    if (movies.size() >= limit) break;
+                    
+                    int currentCount = movies.size() + 1;
+                    System.out.println("Processing movie " + currentCount + "...");
+                    
+                    try {
+                        Movie movie = parseMovie(element);
+                        if (movie != null) {
+                            movies.add(movie);
+                            System.out.println("Added movie: " + movie.getTitle());
+                        } else {
+                            System.out.println("Skipping movie, parsing failed");
+                        }
+                        
+                        // 控制请求频率
+                        Thread.sleep(DELAY_MS);
+                    } catch (Exception e) {
+                        System.err.println("Error parsing movie: " + e.getMessage());
+                        e.printStackTrace();
+                    }
+                }
+                
+                page++;
+            } catch (Exception e) {
+                System.err.println("Error crawling page: " + e.getMessage());
+                e.printStackTrace();
+                break;
+            }
+        }
+        
+        System.out.println("Crawling finished. Found " + movies.size() + " movies.");
+        return movies;
+    }
+
+    private Movie parseMovie(Element element) {
+        try {
+            // 提取标题
+            Element titleElement = element.selectFirst(".hd .title");
+            if (titleElement == null) {
+                System.err.println("Title element not found");
+                return null;
+            }
+            String title = titleElement.text();
+            System.out.println("Title: " + title);
+            
+            // 提取年份
+            Element yearElement = element.selectFirst(".bd p:first-child");
+            if (yearElement == null) {
+                System.err.println("Year element not found");
+                return null;
+            }
+            String yearText = yearElement.text().trim();
+            System.out.println("Year text: " + yearText);
+            
+            // 从字符串中提取年份
+            int year = 0;
+            // 使用正则表达式提取年份
+            java.util.regex.Matcher matcher = java.util.regex.Pattern.compile("(\\d{4})").matcher(yearText);
+            if (matcher.find()) {
+                year = Integer.parseInt(matcher.group(1));
+            }
+            if (year == 0) {
+                System.err.println("Year not found in text: " + yearText);
+                return null;
+            }
+            System.out.println("Year: " + year);
+            
+            // 提取评分
+            Element ratingElement = element.selectFirst(".rating_num");
+            if (ratingElement == null) {
+                System.err.println("Rating element not found");
+                return null;
+            }
+            String ratingText = ratingElement.text();
+            System.out.println("Rating text: " + ratingText);
+            
+            double rating = Double.parseDouble(ratingText);
+            System.out.println("Rating: " + rating);
+            
+            // 提取类型
+            String genre = "";
+            String infoText = yearElement.text();
+            if (infoText.contains("/")) {
+                String[] parts = infoText.split("/");
+                if (parts.length > 2) {
+                    genre = parts[2].trim();
+                }
+            }
+            System.out.println("Genre: " + genre);
+            
+            // 简化处理，不进入详情页
+            String director = "";
+            String actors = "";
+            String synopsis = "";
+            
+            System.out.println("Parsed movie: " + title + " (" + year + ") - " + rating + " - " + genre);
+            return new Movie(title, year, rating, genre, director, actors, synopsis);
+        } catch (Exception e) {
+            System.err.println("Error parsing movie: " + e.getMessage());
+            e.printStackTrace();
+            return null;
+        }
+    }
+}

W3/movies.csv

@@ -0,0 +1,51 @@
+Title,Year,Rating,Genre,Director,Actors,Synopsis
+肖申克的救赎,1994,9.7,美国,,,
+霸王别姬,1993,9.6,中国大陆 中国香港,,,
+泰坦尼克号,1997,9.5,剧情 爱情 灾难,,,
+阿甘正传,1994,9.5,美国,,,
+千与千寻,2001,9.4,日本,,,
+美丽人生,1997,9.5,剧情 喜剧 爱情 战争,,,
+星际穿越,2014,9.4,剧情 科幻 冒险,,,
+这个杀手不太冷,1994,9.4,法国 美国,,,
+盗梦空间,2010,9.4,剧情 科幻 悬疑 冒险,,,
+楚门的世界,1998,9.4,美国,,,
+辛德勒的名单,1993,9.5,剧情 历史 战争,,,
+忠犬八公的故事,2009,9.4,剧情,,,
+海上钢琴师,1998,9.3,意大利,,,
+疯狂动物城,2016,9.3,美国,,,
+三傻大闹宝莱坞,2009,9.2,印度,,,
+机器人总动员,2008,9.3,美国,,,
+放牛班的春天,2004,9.3,剧情 音乐,,,
+无间道,2002,9.3,梁朝伟 Tony Leung Chiu W... 2002,,,
+控方证人,1957,9.6,美国,,,
+寻梦环游记,2017,9.1,美国,,,
+大话西游之大圣娶亲,1995,9.2,中国香港 中国大陆,,,
+熔炉,2011,9.3,... 2011,,,
+触不可及,2011,9.3,法国,,,
+教父,1972,9.3,剧情 犯罪,,,
+末代皇帝,1987,9.3,英国 意大利 中国大陆 法国,,,
+哈利·波特与魔法石,2001,9.2,Rupert Grint 2001,,,
+当幸福来敲门,2006,9.1,剧情 传记 家庭,,,
+龙猫,1988,9.2,日本,,,
+活着,1994,9.3,姜武 Wu Jiang 1994,,,
+怦然心动,2010,9.1,美国,,,
+蝙蝠侠：黑暗骑士,2008,9.2,剧情 动作 科幻 犯罪 惊悚,,,
+指环王3：王者无敌,2003,9.3,美国 新西兰,,,
+我不是药神,2018,9.0,周... 2018,,,
+乱世佳人,1939,9.3,美国,,,
+飞屋环游记,2009,9.1,美国,,,
+让子弹飞,2010,9.0,周润发 Yun-F... 2010,,,
+哈尔的移动城堡,2004,9.1,日本,,,
+十二怒汉,1957,9.4,美国,,,
+海蒂和爷爷,2015,9.3,德国 瑞士,,,
+素媛,2013,9.3,韩国,,,
+猫鼠游戏,2002,9.1,传记 犯罪 剧情,,,
+天空之城,1986,9.2,日本,,,
+鬼子来了,2000,9.3,... 2000,,,
+摔跤吧！爸爸,2016,9.0,印度,,,
+少年派的奇幻漂流,2012,9.1,美国 中国台湾 英国 加拿大,,,
+钢琴家,2002,9.3,剧情 传记 战争 音乐,,,
+指环王2：双塔奇兵,2002,9.2,美国 新西兰,,,
+死亡诗社,1989,9.2,美国,,,
+大话西游之月光宝盒,1995,9.0,中国香港 中国大陆,,,
+绿皮书,2018,8.9,美国 中国大陆,,,