上传文件至 'w9'

w9/CrawlerApp.java

@@ -0,0 +1,238 @@
+import java.util.*;
+import java.util.Date;
+
+/**
+ * Article类 - 表示爬虫抓取的文章
+ */
+class Article {
+    private String title;
+    private String content;
+    private String author;      // 新增字段：作者
+    private Date publishDate;  // 新增字段：发布时间
+
+    public Article(String title, String content) {
+        this.title = title;
+        this.content = content;
+        this.author = null;    // 默认值为null
+        this.publishDate = null; // 默认值为null
+    }
+
+    public Article(String title, String content, String author, Date publishDate) {
+        this.title = title;
+        this.content = content;
+        this.author = author;
+        this.publishDate = publishDate;
+    }
+
+    // Getter 和 Setter 方法
+    public String getTitle() { return title; }
+    public void setTitle(String title) { this.title = title; }
+
+    public String getContent() { return content; }
+    public void setContent(String content) { this.content = content; }
+
+    public String getAuthor() { return author; }
+    public void setAuthor(String author) { this.author = author; }
+
+    public Date getPublishDate() { return publishDate; }
+    public void setPublishDate(Date publishDate) { this.publishDate = publishDate; }
+
+    @Override
+    public String toString() {
+        String dateStr = (publishDate != null) ? publishDate.toString() : "未知";
+        String authorStr = (author != null && !author.trim().isEmpty()) ? author : "未知";
+        return "标题: " + title + ", 作者: " + authorStr + ", 发布时间: " + dateStr;
+    }
+}
+
+/**
+ * HistoryCommand类 - 记录命令历史
+ */
+class HistoryCommand {
+    private List<String> historyList = new ArrayList<>();
+
+    // 添加命令到历史记录
+    public void addCommand(String command) {
+        historyList.add(command);
+    }
+
+    // 获取所有历史记录
+    public List<String> getHistory() {
+        return new ArrayList<>(historyList); // 返回副本，防止外部修改
+    }
+
+    // 获取最近N条历史记录
+    public List<String> getRecentHistory(int n) {
+        if (n <= 0) return new ArrayList<>();
+        int startIndex = Math.max(0, historyList.size() - n);
+        return new ArrayList<>(historyList.subList(startIndex, historyList.size()));
+    }
+
+    // 清空历史记录
+    public void clearHistory() {
+        historyList.clear();
+    }
+
+    // 获取历史记录数量
+    public int getHistoryCount() {
+        return historyList.size();
+    }
+}
+
+/**
+ * 主程序 - 演示类功能
+ */
+public class CrawlerApp {
+    // 模拟文章列表
+    private static List<Article> articleList = new ArrayList<>();
+    private static HistoryCommand history = new HistoryCommand();
+    private static Scanner scanner = new Scanner(System.in);
+
+    public static void main(String[] args) {
+        System.out.println("=== 爬虫系统控制台 ===");
+        System.out.println("命令列表:");
+        System.out.println("  crawl  - 开始抓取文章");
+        System.out.println("  list   - 显示已抓取的文章");
+        System.out.println("  add    - 手动添加文章");
+        System.out.println("  history - 查看命令历史");
+        System.out.println("  clear  - 清空命令历史");
+        System.out.println("  exit   - 退出系统");
+        System.out.println("========================\n");
+
+        // 添加一些示例文章
+        articleList.add(new Article("Java编程入门", "Java是一种面向对象的编程语言...", "张三", new Date()));
+        articleList.add(new Article("Python数据分析", "使用Python进行数据清洗和分析...", "李四", new Date()));
+
+        boolean running = true;
+        while (running) {
+            System.out.print("> ");
+            String input = scanner.nextLine().trim();
+
+            if (input.isEmpty()) continue;
+
+            // 记录命令历史
+            history.addCommand(input);
+
+            // 解析命令
+            String[] parts = input.split("\\s+");
+            String command = parts[0].toLowerCase();
+
+            switch (command) {
+                case "crawl":
+                    handleCrawlCommand(parts);
+                    break;
+                case "list":
+                    handleListCommand();
+                    break;
+                case "add":
+                    handleAddCommand();
+                    break;
+                case "history":
+                    handleHistoryCommand(parts);
+                    break;
+                case "clear":
+                    history.clearHistory();
+                    System.out.println("命令历史已清空");
+                    break;
+                case "exit":
+                    System.out.println("退出系统...");
+                    running = false;
+                    break;
+                default:
+                    System.out.println("未知命令: " + command);
+                    System.out.println("输入 'exit' 退出系统");
+            }
+        }
+        scanner.close();
+    }
+
+    // 处理爬取命令
+    private static void handleCrawlCommand(String[] parts) {
+        String keyword = (parts.length > 1) ? parts[1] : "新闻";
+        System.out.println("正在抓取关于 '" + keyword + "' 的文章...");
+
+        // 模拟抓取过程
+        try {
+            Thread.sleep(1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+
+        // 模拟抓取结果
+        Article newArticle = new Article(
+                "关于" + keyword + "的最新报道",
+                "这是关于" + keyword + "的详细内容...",
+                "系统抓取",
+                new Date()
+        );
+
+        articleList.add(newArticle);
+        System.out.println("抓取完成！新增文章: " + newArticle.getTitle());
+    }
+
+    // 处理列出文章命令
+    private static void handleListCommand() {
+        if (articleList.isEmpty()) {
+            System.out.println("当前没有文章");
+            return;
+        }
+
+        System.out.println("\n=== 已抓取的文章列表 ===");
+        for (int i = 0; i < articleList.size(); i++) {
+            System.out.println((i + 1) + ". " + articleList.get(i));
+        }
+        System.out.println("总共 " + articleList.size() + " 篇文章\n");
+    }
+
+    // 处理添加文章命令
+    private static void handleAddCommand() {
+        System.out.println("\n--- 添加新文章 ---");
+
+        System.out.print("请输入文章标题: ");
+        String title = scanner.nextLine().trim();
+
+        System.out.print("请输入文章内容: ");
+        String content = scanner.nextLine().trim();
+
+        System.out.print("请输入作者(可选，直接回车跳过): ");
+        String author = scanner.nextLine().trim();
+        if (author.isEmpty()) author = null;
+
+        System.out.print("请输入发布日期(yyyy-MM-dd，可选，直接回车跳过): ");
+        String dateStr = scanner.nextLine().trim();
+        Date publishDate = null;
+        if (!dateStr.isEmpty()) {
+            try {
+                // 简单日期解析，实际项目中应该使用SimpleDateFormat
+                publishDate = new Date();
+            } catch (Exception e) {
+                System.out.println("日期格式错误，使用当前日期");
+                publishDate = new Date();
+            }
+        }
+
+        Article newArticle = new Article(title, content, author, publishDate);
+        articleList.add(newArticle);
+        System.out.println("文章添加成功！\n");
+    }
+
+    // 处理历史命令
+    private static void handleHistoryCommand(String[] parts) {
+        if (parts.length > 1 && parts[1].equals("count")) {
+            System.out.println("历史命令总数: " + history.getHistoryCount());
+            return;
+        }
+
+        List<String> historyList = history.getHistory();
+        if (historyList.isEmpty()) {
+            System.out.println("命令历史为空");
+            return;
+        }
+
+        System.out.println("\n=== 命令历史 ===");
+        for (int i = 0; i < historyList.size(); i++) {
+            System.out.println((i + 1) + ". " + historyList.get(i));
+        }
+        System.out.println();
+    }
+}