Add w5 to w11 projects: shape inheritance, animal interface, exception handling, generics, maven project, repository with analyze command, exception hierarchy with retry

3 weeks ago · 3557013fe8
72 changed files with 1694 additions and 6 deletions
--- a/w10/ARCHITECTURE_AUDIT.md
+++ b/w10/ARCHITECTURE_AUDIT.md
@ -0,0 +1,135 @@
+# AI 架构审计：策略模式解耦与封装审查
+
+## 一、类签名汇总
+
+### 1. Article（数据模型）
+```java
+public class Article {
+    private String title;
+    private String url;
+    private String content;
+    private long timestamp;
+    
+    public Article(String title, String url)  // 防御性参数校验
+    public void setTitle(String title)        // 防御性参数校验
+    public void setUrl(String url)            // 防御性参数校验
+    // Getter方法
+}
+```
+
+### 2. ArticleRepository（仓储层）
+```java
+public class ArticleRepository {
+    private final List<Article> articles;
+    
+    public void add(Article article)          // 防御 null
+    public void addAll(Collection<Article>)  // 防御 null 和空集合
+    public List<Article> getAll()            // 返回不可变视图
+    public Article findByTitle(String)       // 防御 null
+    public int count()
+    public void clear()
+    public boolean contains(Article)         // 防御 null
+}
+```
+
+### 3. ArticleAnalyzer（策略接口）
+```java
+public interface ArticleAnalyzer {
+    Map<String, Object> analyze(List<Article> articles);
+    String getName();
+}
+```
+
+### 4. ArticleCountAnalyzer（具体策略1）
+```java
+public class ArticleCountAnalyzer implements ArticleAnalyzer {
+    public Map<String, Object> analyze(List<Article>);
+    public String getName();
+}
+```
+
+### 5. TitleLengthAnalyzer（具体策略2）
+```java
+public class TitleLengthAnalyzer implements ArticleAnalyzer {
+    public Map<String, Object> analyze(List<Article>);
+    public String getName();
+}
+```
+
+### 6. AnalyzeCommand（命令类）
+```java
+public class AnalyzeCommand {
+    private final List<Article> articles;
+    private final List<ArticleAnalyzer> analyzers;
+    
+    public AnalyzeCommand(List<Article>, List<ArticleAnalyzer>);
+    public void execute();                   // 复用策略解析，不存储结果
+    public void addAnalyzer(ArticleAnalyzer);
+}
+```
+
+## 二、AI 架构审计请求
+
+> 作为 Java 架构师，请审查我的代码设计：
+> 
+> 1. **策略解耦**：
+>    - ArticleAnalyzer 接口是否定义清晰？
+>    - 具体策略（ArticleCountAnalyzer、TitleLengthAnalyzer）是否与上下文解耦？
+>    - 添加新策略是否无需修改现有代码？
+> 
+> 2. **封装性**：
+>    - ArticleRepository 的内部状态是否得到保护？
+>    - getAll() 返回不可变视图是否正确？
+>    - 防御性编程是否过度或不足？
+> 
+> 3. **单一职责**：
+>    - AnalyzeCommand 是否只负责协调执行，不承担存储职责？
+>    - 各分析器是否只关注单一分析维度？
+> 
+> 4. **依赖注入**：
+>    - 依赖是否通过构造函数注入？
+>    - 是否符合依赖倒置原则？
+> 
+> 请给出改进建议和优化方案。
+
+## 三、设计原则应用
+
+### 已应用的设计原则
+
+| 原则 | 应用位置 | 说明 |
+|------|---------|------|
+| 单一职责 | ArticleAnalyzer 接口 | 每个分析器只负责一种分析 |
+| 开闭原则 | 策略模式 | 添加新分析器无需修改现有代码 |
+| 依赖倒置 | AnalyzeCommand | 依赖抽象接口而非具体实现 |
+| 里氏替换 | 策略实现 | 所有分析器可互换使用 |
+
+### 防御性编程
+
+| 防御点 | 位置 | 方式 |
+|--------|------|------|
+| null检查 | Article构造器 | IllegalArgumentException |
+| null检查 | Repository.add() | Objects.requireNonNull |
+| null检查 | Repository.addAll() | 遍历检查每个元素 |
+| 不可变返回 | Repository.getAll() | Collections.unmodifiableList |
+
+## 四、文件列表
+
+- [Article.java](file:///D:\嘻嘻哈哈\Git\java\w10\Article.java)
+- [ArticleRepository.java](file:///D:\嘻嘻哈哈\Git\java\w10\ArticleRepository.java)
+- [ArticleAnalyzer.java](file:///D:\嘻嘻哈哈\Git\java\w10\ArticleAnalyzer.java)
+- [ArticleCountAnalyzer.java](file:///D:\嘻嘻哈哈\Git\java\w10\ArticleCountAnalyzer.java)
+- [TitleLengthAnalyzer.java](file:///D:\嘻嘻哈哈\Git\java\w10\TitleLengthAnalyzer.java)
+- [AnalyzeCommand.java](file:///D:\嘻嘻哈哈\Git\java\w10\AnalyzeCommand.java)
+- [TestMain.java](file:///D:\嘻嘻哈哈\Git\java\w10\TestMain.java)
+
+## 五、运行方式
+
+```bash
+# 编译
+javac Article.java ArticleRepository.java ArticleAnalyzer.java \
+      ArticleCountAnalyzer.java TitleLengthAnalyzer.java \
+      AnalyzeCommand.java TestMain.java
+
+# 运行
+java TestMain
+```
--- a/w10/AnalyzeCommand.class
+++ b/w10/AnalyzeCommand.class
--- a/w10/AnalyzeCommand.java
+++ b/w10/AnalyzeCommand.java
@ -0,0 +1,85 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * 分析命令类
+ * 复用策略解析但不存储，只输出统计信息
+ */
+public class AnalyzeCommand {
+    private final List<Article> articles;
+    private final List<ArticleAnalyzer> analyzers;
+
+    /**
+     * 构造函数，接收文章列表和分析器列表
+     * @param articles 要分析的文章列表
+     * @param analyzers 分析器列表
+     */
+    public AnalyzeCommand(List<Article> articles, List<ArticleAnalyzer> analyzers) {
+        Objects.requireNonNull(articles, "文章列表不能为null");
+        Objects.requireNonNull(analyzers, "分析器列表不能为null");
+        
+        this.articles = new ArrayList<>(articles);
+        this.analyzers = new ArrayList<>(analyzers);
+    }
+
+    /**
+     * 执行分析并输出结果（不存储）
+     */
+    public void execute() {
+        System.out.println("================================================");
+        System.out.println("              文章分析报告");
+        System.out.println("================================================");
+        System.out.println("分析文章数量: " + articles.size());
+        System.out.println("分析器数量: " + analyzers.size());
+        System.out.println("------------------------------------------------");
+
+        for (ArticleAnalyzer analyzer : analyzers) {
+            System.out.println("\n【" + analyzer.getName() + "】");
+            Map<String, Object> result = analyzer.analyze(articles);
+            
+            // 输出分析结果（不存储）
+            for (Map.Entry<String, Object> entry : result.entrySet()) {
+                if (!"analyzer".equals(entry.getKey())) {
+                    System.out.println("  " + formatKey(entry.getKey()) + ": " + formatValue(entry.getValue()));
+                }
+            }
+        }
+
+        System.out.println("\n================================================");
+        System.out.println("              分析报告结束");
+        System.out.println("================================================");
+    }
+
+    /**
+     * 格式化键名
+     */
+    private String formatKey(String key) {
+        switch (key) {
+            case "totalCount": return "文章总数";
+            case "averageLength": return "平均标题长度";
+            case "maxLength": return "最长标题长度";
+            case "minLength": return "最短标题长度";
+            default: return key;
+        }
+    }
+
+    /**
+     * 格式化值
+     */
+    private String formatValue(Object value) {
+        if (value instanceof Double) {
+            return String.format("%.2f", value);
+        }
+        return value.toString();
+    }
+
+    /**
+     * 添加分析器
+     */
+    public void addAnalyzer(ArticleAnalyzer analyzer) {
+        Objects.requireNonNull(analyzer, "分析器不能为null");
+        analyzers.add(analyzer);
+    }
+}
--- a/w10/Article.class
+++ b/w10/Article.class
--- a/w10/Article.java
+++ b/w10/Article.java
@ -0,0 +1,65 @@
+public class Article {
+    private String title;
+    private String url;
+    private String content;
+    private long timestamp;
+
+    public Article(String title, String url) {
+        if (title == null || title.trim().isEmpty()) {
+            throw new IllegalArgumentException("标题不能为空");
+        }
+        if (url == null || url.trim().isEmpty()) {
+            throw new IllegalArgumentException("URL不能为空");
+        }
+        this.title = title;
+        this.url = url;
+        this.timestamp = System.currentTimeMillis();
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        if (title == null || title.trim().isEmpty()) {
+            throw new IllegalArgumentException("标题不能为空");
+        }
+        this.title = title;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        if (url == null || url.trim().isEmpty()) {
+            throw new IllegalArgumentException("URL不能为空");
+        }
+        this.url = url;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public long getTimestamp() {
+        return timestamp;
+    }
+
+    public void setTimestamp(long timestamp) {
+        this.timestamp = timestamp;
+    }
+
+    @Override
+    public String toString() {
+        return "Article{" +
+                "title='" + title + '\'' +
+                ", url='" + url + '\'' +
+                ", timestamp=" + timestamp +
+                '}';
+    }
+}
--- a/w10/ArticleAnalyzer.class
+++ b/w10/ArticleAnalyzer.class
--- a/w10/ArticleAnalyzer.java
+++ b/w10/ArticleAnalyzer.java
@ -0,0 +1,21 @@
+import java.util.List;
+import java.util.Map;
+
+/**
+ * 文章分析策略接口
+ * 策略模式：定义分析算法的接口，不同的分析算法可以独立变化
+ */
+public interface ArticleAnalyzer {
+    /**
+     * 分析文章并返回统计结果
+     * @param articles 文章列表
+     * @return 统计结果映射
+     */
+    Map<String, Object> analyze(List<Article> articles);
+
+    /**
+     * 获取分析器名称
+     * @return 分析器名称
+     */
+    String getName();
+}
--- a/w10/ArticleCountAnalyzer.class
+++ b/w10/ArticleCountAnalyzer.class
--- a/w10/ArticleCountAnalyzer.java
+++ b/w10/ArticleCountAnalyzer.java
@ -0,0 +1,18 @@
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class ArticleCountAnalyzer implements ArticleAnalyzer {
+    @Override
+    public Map<String, Object> analyze(List<Article> articles) {
+        Map<String, Object> result = new HashMap<>();
+        result.put("analyzer", getName());
+        result.put("totalCount", articles.size());
+        return result;
+    }
+
+    @Override
+    public String getName() {
+        return "文章数量分析器";
+    }
+}
--- a/w10/ArticleRepository.class
+++ b/w10/ArticleRepository.class
--- a/w10/ArticleRepository.java
+++ b/w10/ArticleRepository.java
@ -0,0 +1,73 @@
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+public class ArticleRepository {
+    private final List<Article> articles;
+
+    public ArticleRepository() {
+        this.articles = new ArrayList<>();
+    }
+
+    /**
+     * 添加单个文章，防御 null
+     */
+    public void add(Article article) {
+        Objects.requireNonNull(article, "文章不能为null");
+        articles.add(article);
+    }
+
+    /**
+     * 添加多个文章，防御 null 和空集合
+     */
+    public void addAll(Collection<Article> articlesToAdd) {
+        Objects.requireNonNull(articlesToAdd, "文章集合不能为null");
+        
+        for (Article article : articlesToAdd) {
+            Objects.requireNonNull(article, "集合中包含null文章");
+            articles.add(article);
+        }
+    }
+
+    /**
+     * 获取所有文章的不可变视图
+     */
+    public List<Article> getAll() {
+        return Collections.unmodifiableList(articles);
+    }
+
+    /**
+     * 根据标题查找文章
+     */
+    public Article findByTitle(String title) {
+        Objects.requireNonNull(title, "标题不能为null");
+        return articles.stream()
+                .filter(a -> title.equals(a.getTitle()))
+                .findFirst()
+                .orElse(null);
+    }
+
+    /**
+     * 获取文章数量
+     */
+    public int count() {
+        return articles.size();
+    }
+
+    /**
+     * 清空所有文章
+     */
+    public void clear() {
+        articles.clear();
+    }
+
+    /**
+     * 检查是否包含指定文章
+     */
+    public boolean contains(Article article) {
+        Objects.requireNonNull(article, "文章不能为null");
+        return articles.contains(article);
+    }
+}
--- a/w10/TestMain.class
+++ b/w10/TestMain.class
--- a/w10/TestMain.java
+++ b/w10/TestMain.java
@ -0,0 +1,95 @@
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class TestMain {
+    public static void main(String[] args) {
+        System.out.println("===== 测试 ArticleRepository =====");
+        testRepository();
+
+        System.out.println("\n===== 测试 AnalyzeCommand =====");
+        testAnalyzeCommand();
+
+        System.out.println("\n===== 测试防御性编程 =====");
+        testDefensiveProgramming();
+    }
+
+    private static void testRepository() {
+        ArticleRepository repo = new ArticleRepository();
+        
+        Article article1 = new Article("Java编程入门", "https://example.com/java");
+        Article article2 = new Article("Python数据分析", "https://example.com/python");
+        Article article3 = new Article("JavaScript高级", "https://example.com/js");
+        
+        // 测试添加单个文章
+        repo.add(article1);
+        repo.add(article2);
+        System.out.println("添加2篇文章后数量: " + repo.count());
+        
+        // 测试添加多个文章
+        repo.addAll(Arrays.asList(article3));
+        System.out.println("批量添加后数量: " + repo.count());
+        
+        // 测试查找
+        Article found = repo.findByTitle("Java编程入门");
+        System.out.println("查找结果: " + (found != null ? found.getTitle() : "未找到"));
+        
+        // 测试获取所有文章（不可变视图）
+        List<Article> all = repo.getAll();
+        System.out.println("获取文章列表大小: " + all.size());
+    }
+
+    private static void testAnalyzeCommand() {
+        // 创建示例文章
+        List<Article> articles = new ArrayList<>();
+        articles.add(new Article("Java编程入门教程", "https://example.com/java"));
+        articles.add(new Article("Python数据分析实战", "https://example.com/python"));
+        articles.add(new Article("JavaScript高级编程", "https://example.com/js"));
+        articles.add(new Article("Spring Boot指南", "https://example.com/spring"));
+        articles.add(new Article("Docker容器化部署", "https://example.com/docker"));
+        
+        // 创建分析器列表
+        List<ArticleAnalyzer> analyzers = new ArrayList<>();
+        analyzers.add(new ArticleCountAnalyzer());
+        analyzers.add(new TitleLengthAnalyzer());
+        
+        // 创建并执行分析命令
+        AnalyzeCommand command = new AnalyzeCommand(articles, analyzers);
+        command.execute();
+    }
+
+    private static void testDefensiveProgramming() {
+        ArticleRepository repo = new ArticleRepository();
+        
+        try {
+            repo.add(null);
+            System.out.println("ERROR: 应该抛出异常！");
+        } catch (NullPointerException e) {
+            System.out.println("正确: 成功捕获 null 文章异常");
+        }
+        
+        try {
+            repo.addAll(null);
+            System.out.println("ERROR: 应该抛出异常！");
+        } catch (NullPointerException e) {
+            System.out.println("正确: 成功捕获 null 集合异常");
+        }
+        
+        try {
+            List<Article> listWithNull = new ArrayList<>();
+            listWithNull.add(new Article("Test", "https://test.com"));
+            listWithNull.add(null);
+            repo.addAll(listWithNull);
+            System.out.println("ERROR: 应该抛出异常！");
+        } catch (NullPointerException e) {
+            System.out.println("正确: 成功捕获集合中包含 null 异常");
+        }
+        
+        try {
+            new Article(null, "https://test.com");
+            System.out.println("ERROR: 应该抛出异常！");
+        } catch (IllegalArgumentException e) {
+            System.out.println("正确: 成功捕获空标题异常");
+        }
+    }
+}
--- a/w10/TitleLengthAnalyzer.class
+++ b/w10/TitleLengthAnalyzer.class
--- a/w10/TitleLengthAnalyzer.java
+++ b/w10/TitleLengthAnalyzer.java
@ -0,0 +1,44 @@
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class TitleLengthAnalyzer implements ArticleAnalyzer {
+    @Override
+    public Map<String, Object> analyze(List<Article> articles) {
+        Map<String, Object> result = new HashMap<>();
+        
+        if (articles.isEmpty()) {
+            result.put("analyzer", getName());
+            result.put("averageLength", 0);
+            result.put("maxLength", 0);
+            result.put("minLength", 0);
+            return result;
+        }
+
+        int totalLength = articles.stream()
+                .mapToInt(a -> a.getTitle().length())
+                .sum();
+        
+        int maxLength = articles.stream()
+                .mapToInt(a -> a.getTitle().length())
+                .max()
+                .orElse(0);
+        
+        int minLength = articles.stream()
+                .mapToInt(a -> a.getTitle().length())
+                .min()
+                .orElse(0);
+
+        result.put("analyzer", getName());
+        result.put("averageLength", (double) totalLength / articles.size());
+        result.put("maxLength", maxLength);
+        result.put("minLength", minLength);
+        
+        return result;
+    }
+
+    @Override
+    public String getName() {
+        return "标题长度分析器";
+    }
+}
--- a/w11/ExceptionDemo.class
+++ b/w11/ExceptionDemo.class
--- a/w11/ExceptionDemo.java
+++ b/w11/ExceptionDemo.java
@ -0,0 +1,54 @@
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class ExceptionDemo {
+    public static void main(String[] args) {
+        System.out.println("===== 测试 URL 校验测试 =====");
+        testUrlValidation();
+        
+        System.out.println("\n===== 测试重试机制测试 =====");
+        testRetryMechanism();
+    }
+    
+    private static void testUrlValidation() {
+        String[] testUrls = {
+            "https://www.example.com",
+            "invalid-url",
+            null
+        };
+        
+        for (String url : testUrls) {
+            try {
+                System.out.println("正在校验 URL: " + url);
+                UrlValidator.validateUrl(url);
+                System.out.println("URL 格式有效！");
+            } catch (UrlFormatException e) {
+                System.err.println("错误: " + e.getMessage());
+                System.err.println("无效的 URL: " + e.getInvalidUrl());
+            }
+        }
+    }
+    
+    private static void testRetryMechanism() {
+        // 模拟一个会失败几次的操作
+        AtomicInteger attemptCounter = new AtomicInteger(0);
+        
+        try {
+            String result = RetryUtils.executeWithRetry(() -> {
+                int currentAttempt = attemptCounter.incrementAndGet();
+                System.out.println("执行操作... (尝试次数: " + currentAttempt + ")");
+                
+                // 模拟前3次失败，第4次成功
+                if (currentAttempt < 4) {
+                    throw new RuntimeException("模拟失败");
+                }
+                
+                return "操作成功完成！";
+            });
+            
+            System.out.println("结果: " + result);
+        } catch (NetworkException e) {
+            System.err.println("错误: " + e.getMessage());
+            e.printStackTrace();
+        }
+    }
+}
--- a/w11/NetworkException.class
+++ b/w11/NetworkException.class
--- a/w11/NetworkException.java
+++ b/w11/NetworkException.java
@ -0,0 +1,9 @@
+public class NetworkException extends Exception {
+    public NetworkException(String message) {
+        super(message);
+    }
+    
+    public NetworkException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
--- a/w11/README.md
+++ b/w11/README.md
@ -0,0 +1,48 @@
+# Java 异常体系设计文档
+
+## 1. 异常层次设计
+
+### 1.1 未检查异常 (RuntimeException)
+- **UrlFormatException**：继承自 RuntimeException，用于处理 URL 格式校验失败
+  - 包含无效 URL 的信息
+  - 提供有意义的错误消息
+
+### 1.2 已检查异常 (Exception)
+- **NetworkException**：继承自 Exception，用于处理网络相关问题
+  - 支持链式异常 (cause)
+  - 提供网络操作的上下文信息
+
+## 2. 异常设计原则
+
+### 2.1 Checked/Unchecked 选择
+- **UrlFormatException (Unchecked)**：因为 URL 格式校验是编程错误，可以通过预检查避免，使用 Unchecked 异常更合理
+- **NetworkException (Checked)**：因为网络问题是不可预测的外部因素，使用 Checked 异常强制调用者处理
+
+### 2.2 异常包装
+- 所有异常都保留原始异常信息 (cause)
+- 使用链式异常避免根因丢失
+- 提供构造函数支持 cause 链
+
+### 2.3 上下文信息
+- UrlFormatException 保存无效的 URL
+- NetworkException 支持传递详细的错误信息
+- 异常消息包含足够的上下文帮助调试
+
+## 3. 重试机制
+
+### 3.1 指数退避策略
+- 基础等待时间：500ms
+- 计算公式：`wait = base * 2^attempt`
+- 最大重试次数：5次
+- 等待时间示例：500ms, 1000ms, 2000ms, 4000ms, 8000ms
+
+## 4. AI 架构审计请求
+
+> 作为Java架构师，请审查我的异常层次设计：Checked/Unchecked选择是否合理？异常包装是否丢失根因？日志是否包含足够上下文？
+
+## 5. 文件列表
+- [UrlFormatException.java](file:///D:\嘻嘻哈哈\Git\java\w11\UrlFormatException.java)
+- [NetworkException.java](file:///D:\嘻嘻哈哈\Git\java\w11\NetworkException.java)
+- [RetryUtils.java](file:///D:\嘻嘻哈哈\Git\java\w11\RetryUtils.java)
+- [UrlValidator.java](file:///D:\嘻嘻哈哈\Git\java\w11\UrlValidator.java)
+- [ExceptionDemo.java](file:///D:\嘻嘻哈哈\Git\java\w11\ExceptionDemo.java)
--- a/w11/RetryUtils.class
+++ b/w11/RetryUtils.class
--- a/w11/RetryUtils.java
+++ b/w11/RetryUtils.java
@ -0,0 +1,36 @@
+import java.util.concurrent.TimeUnit;
+import java.util.function.Supplier;
+
+public class RetryUtils {
+    private static final long BASE_WAIT_MS = 500;
+    private static final int MAX_ATTEMPTS = 5;
+    
+    public static <T> T executeWithRetry(Supplier<T> supplier) throws NetworkException {
+        int attempt = 0;
+        while (true) {
+            try {
+                return supplier.get();
+            } catch (Exception e) {
+                attempt++;
+                if (attempt >= MAX_ATTEMPTS) {
+                    throw new NetworkException("重试失败，已达最大重试次数", e);
+                }
+                
+                long waitTime = calculateWaitTime(attempt);
+                System.out.println("重试失败，等待 " + waitTime + "ms 后重试... (第 " + attempt + " 次尝试)");
+                
+                try {
+                    TimeUnit.MILLISECONDS.sleep(waitTime);
+                } catch (InterruptedException ie) {
+                    Thread.currentThread().interrupt();
+                    throw new NetworkException("重试被中断", ie);
+                }
+            }
+        }
+    }
+    
+    private static long calculateWaitTime(int attempt) {
+        // 指数退避公式：wait = base * 2^attempt
+        return BASE_WAIT_MS * (long) Math.pow(2, attempt);
+    }
+}
--- a/w11/UrlFormatException.class
+++ b/w11/UrlFormatException.class
--- a/w11/UrlFormatException.java
+++ b/w11/UrlFormatException.java
@ -0,0 +1,17 @@
+public class UrlFormatException extends RuntimeException {
+    private String invalidUrl;
+    
+    public UrlFormatException(String message, String invalidUrl) {
+        super(message);
+        this.invalidUrl = invalidUrl;
+    }
+    
+    public UrlFormatException(String message, Throwable cause, String invalidUrl) {
+        super(message, cause);
+        this.invalidUrl = invalidUrl;
+    }
+    
+    public String getInvalidUrl() {
+        return invalidUrl;
+    }
+}
--- a/w11/UrlValidator.class
+++ b/w11/UrlValidator.class
--- a/w11/UrlValidator.java
+++ b/w11/UrlValidator.java
@ -0,0 +1,16 @@
+import java.net.MalformedURLException;
+import java.net.URL;
+
+public class UrlValidator {
+    public static void validateUrl(String urlStr) {
+        if (urlStr == null || urlStr.trim().isEmpty()) {
+            throw new UrlFormatException("URL不能为空", urlStr);
+        }
+        
+        try {
+            new URL(urlStr);
+        } catch (MalformedURLException e) {
+            throw new UrlFormatException("URL格式无效", e, urlStr);
+        }
+    }
+}
--- a/w5/Circle.class
+++ b/w5/Circle.class
--- a/w5/Circle.java
+++ b/w5/Circle.java
@ -0,0 +1,6 @@
+public class Circle extends Shape {
+    @Override
+    public void draw() {
+        System.out.println("绘制圆形");
+    }
+}
--- a/w5/Rectangle.class
+++ b/w5/Rectangle.class
--- a/w5/Rectangle.java
+++ b/w5/Rectangle.java
@ -0,0 +1,6 @@
+public class Rectangle extends Shape {
+    @Override
+    public void draw() {
+        System.out.println("绘制矩形");
+    }
+}
--- a/w5/Shape.class
+++ b/w5/Shape.class
--- a/w5/Shape.java
+++ b/w5/Shape.java
@ -0,0 +1,5 @@
+public class Shape {
+    public void draw() {
+        System.out.println("绘制形状");
+    }
+}
--- a/w5/ShapeTest.class
+++ b/w5/ShapeTest.class
--- a/w5/ShapeTest.java
+++ b/w5/ShapeTest.java
@ -1,4 +1,22 @@
-package PACKAGE_NAME;
-
 public class ShapeTest {
-}
+    public static void drawShape(Shape s) {
+        s.draw();
+    }
+    
+    public static void main(String[] args) {
+        // 创建形状对象
+        Shape myShape = new Shape();
+        Shape myCircle = new Circle();
+        Shape myRectangle = new Rectangle();
+        
+        // 测试 drawShape 方法
+        System.out.println("测试 Shape 基类:");
+        drawShape(myShape);
+        
+        System.out.println("\n测试 Circle 子类:");
+        drawShape(myCircle);
+        
+        System.out.println("\n测试 Rectangle 子类:");
+        drawShape(myRectangle);
+    }
+}
--- a/w6/Animal.class
+++ b/w6/Animal.class
--- a/w6/Animal.java
+++ b/w6/Animal.java
@ -0,0 +1,3 @@
+public abstract class Animal {
+    public abstract void makeSound();
+}
--- a/w6/AnimalTest.class
+++ b/w6/AnimalTest.class
--- a/w6/AnimalTest.java
+++ b/w6/AnimalTest.java
@ -1,4 +1,25 @@
-package PACKAGE_NAME;
-
 public class AnimalTest {
-}
+    public static void main(String[] args) {
+        // 多态：使用 Animal 类型引用指向子类对象
+        Animal dog = new Dog();
+        Animal cat = new Cat();
+        
+        System.out.println("===== 测试动物叫声 =====");
+        dog.makeSound();
+        cat.makeSound();
+        
+        System.out.println("\n===== 测试接口能力 =====");
+        // 使用 instanceof 检查对象是否实现了 Swimmable 接口
+        if (dog instanceof Swimmable) {
+            ((Swimmable) dog).swim();
+        } else {
+            System.out.println("这个动物不会游泳");
+        }
+        
+        if (cat instanceof Swimmable) {
+            ((Swimmable) cat).swim();
+        } else {
+            System.out.println("这个动物不会游泳");
+        }
+    }
+}
--- a/w6/Cat.class
+++ b/w6/Cat.class
--- a/w6/Cat.java
+++ b/w6/Cat.java
@ -0,0 +1,6 @@
+public class Cat extends Animal {
+    @Override
+    public void makeSound() {
+        System.out.println("猫叫：喵喵喵！");
+    }
+}
--- a/w6/Dog.class
+++ b/w6/Dog.class
--- a/w6/Dog.java
+++ b/w6/Dog.java
@ -0,0 +1,11 @@
+public class Dog extends Animal implements Swimmable {
+    @Override
+    public void makeSound() {
+        System.out.println("狗叫：汪汪汪！");
+    }
+    
+    @Override
+    public void swim() {
+        System.out.println("狗在游泳");
+    }
+}
--- a/w6/Swimmable.class
+++ b/w6/Swimmable.class
--- a/w6/Swimmable.java
+++ b/w6/Swimmable.java
@ -0,0 +1,3 @@
+public interface Swimmable {
+    void swim();
+}
--- a/w7/Account.class
+++ b/w7/Account.class
--- a/w7/Account.java
+++ b/w7/Account.java
@ -0,0 +1,19 @@
+public class Account {
+    private double balance;
+    
+    public Account(double initialBalance) {
+        this.balance = initialBalance;
+    }
+    
+    public void withdraw(double amount) throws InsufficientFundsException {
+        if (amount > balance) {
+            throw new InsufficientFundsException(balance);
+        }
+        balance -= amount;
+        System.out.println("取款成功！当前余额：" + balance);
+    }
+    
+    public double getBalance() {
+        return balance;
+    }
+}
--- a/w7/AccountTest.class
+++ b/w7/AccountTest.class
--- a/w7/AccountTest.java
+++ b/w7/AccountTest.java
@ -0,0 +1,24 @@
+public class AccountTest {
+    public static void main(String[] args) {
+        // 创建账户，初始余额 1000 元
+        Account account = new Account(1000.0);
+        System.out.println("当前账户余额：" + account.getBalance());
+        
+        // 测试取款功能
+        System.out.println("\n===== 尝试取款 500 元 =====");
+        try {
+            account.withdraw(500.0);
+        } catch (InsufficientFundsException e) {
+            System.out.println("错误：" + e.getMessage());
+            System.out.println("当前余额：" + e.getBalance());
+        }
+        
+        System.out.println("\n===== 尝试取款 700 元 =====");
+        try {
+            account.withdraw(700.0);
+        } catch (InsufficientFundsException e) {
+            System.out.println("错误：" + e.getMessage());
+            System.out.println("当前余额：" + e.getBalance());
+        }
+    }
+}
--- a/w7/InsufficientFundsException.class
+++ b/w7/InsufficientFundsException.class
--- a/w7/InsufficientFundsException.java
+++ b/w7/InsufficientFundsException.java
@ -0,0 +1,12 @@
+public class InsufficientFundsException extends Exception {
+    private double balance;
+    
+    public InsufficientFundsException(double balance) {
+        super("余额不足，当前余额为：" + balance);
+        this.balance = balance;
+    }
+    
+    public double getBalance() {
+        return balance;
+    }
+}
--- a/w8/Box.class
+++ b/w8/Box.class
--- a/w8/Box.java
+++ b/w8/Box.java
@ -0,0 +1,26 @@
+public class Box<T> {
+    private T content;
+    
+    public Box() {}
+    
+    public Box(T content) {
+        this.content = content;
+    }
+    
+    public T getContent() {
+        return content;
+    }
+    
+    public void setContent(T content) {
+        this.content = content;
+    }
+    
+    public boolean isEmpty() {
+        return content == null;
+    }
+    
+    @Override
+    public String toString() {
+        return "Box{" + "content=" + content + '}';
+    }
+}
--- a/w8/GenericDemo.class
+++ b/w8/GenericDemo.class
--- a/w8/GenericDemo.java
+++ b/w8/GenericDemo.java
@ -0,0 +1,51 @@
+import java.util.ArrayList;
+import java.util.List;
+
+public class GenericDemo {
+    public static void main(String[] args) {
+        // 测试 Box 泛型类
+        System.out.println("===== 测试 Box 泛型类 =====");
+        Box<String> stringBox = new Box<>("Hello, Generics!");
+        System.out.println(stringBox);
+        
+        Box<Integer> integerBox = new Box<>(100);
+        System.out.println(integerBox);
+        
+        integerBox.setContent(200);
+        System.out.println("修改后：" + integerBox);
+        
+        Box<Double> doubleBox = new Box<>();
+        System.out.println("空盒子：" + doubleBox);
+        System.out.println("是否为空：" + doubleBox.isEmpty());
+        
+        // 测试 Pair 泛型类
+        System.out.println("\n===== 测试 Pair 泛型类 =====");
+        Pair<String, Integer> nameAgePair = new Pair<>("张三", 25);
+        System.out.println(nameAgePair);
+        System.out.println("姓名：" + nameAgePair.getKey());
+        System.out.println("年龄：" + nameAgePair.getValue());
+        
+        Pair<String, String> countryCapitalPair = new Pair<>("中国", "北京");
+        System.out.println(countryCapitalPair);
+        
+        // 测试泛型方法
+        System.out.println("\n===== 测试泛型方法 =====");
+        String[] strArray = {"Java", "Python", "C++", "JavaScript"};
+        System.out.print("字符串数组：");
+        GenericUtils.printArray(strArray);
+        
+        Integer[] intArray = {1, 2, 3, 4, 5};
+        System.out.print("原始数组：");
+        GenericUtils.printArray(intArray);
+        
+        GenericUtils.swap(intArray, 0, 4);
+        System.out.print("交换后数组：");
+        GenericUtils.printArray(intArray);
+        
+        List<Double> doubleList = new ArrayList<>();
+        doubleList.add(1.5);
+        doubleList.add(2.5);
+        doubleList.add(3.5);
+        System.out.println("列表元素数量：" + GenericUtils.countListElements(doubleList));
+    }
+}
--- a/w8/GenericUtils.class
+++ b/w8/GenericUtils.class
--- a/w8/GenericUtils.java
+++ b/w8/GenericUtils.java
@ -0,0 +1,24 @@
+import java.util.ArrayList;
+import java.util.List;
+
+public class GenericUtils {
+    // 泛型方法：打印数组元素
+    public static <E> void printArray(E[] array) {
+        for (E element : array) {
+            System.out.print(element + " ");
+        }
+        System.out.println();
+    }
+    
+    // 泛型方法：交换数组中的两个元素
+    public static <T> void swap(T[] array, int i, int j) {
+        T temp = array[i];
+        array[i] = array[j];
+        array[j] = temp;
+    }
+    
+    // 泛型方法：计算列表中的元素数量
+    public static <E> int countListElements(List<E> list) {
+        return list.size();
+    }
+}
--- a/w8/Pair.class
+++ b/w8/Pair.class
--- a/w8/Pair.java
+++ b/w8/Pair.java
@ -0,0 +1,30 @@
+public class Pair<K, V> {
+    private K key;
+    private V value;
+    
+    public Pair(K key, V value) {
+        this.key = key;
+        this.value = value;
+    }
+    
+    public K getKey() {
+        return key;
+    }
+    
+    public void setKey(K key) {
+        this.key = key;
+    }
+    
+    public V getValue() {
+        return value;
+    }
+    
+    public void setValue(V value) {
+        this.value = value;
+    }
+    
+    @Override
+    public String toString() {
+        return "Pair{" + "key=" + key + ", value=" + value + '}';
+    }
+}
--- a/w8/README.md
+++ b/w8/README.md
@ -0,0 +1,54 @@
+# Java 泛型类练习
+
+本项目包含几个典型的 Java 泛型类练习，展示了泛型的使用方法。
+
+## 文件结构
+
+1. [Box.java](file:///D:\嘻嘻哈哈\Git\java\w8\Box.java) - 简单的泛型容器类
+2. [Pair.java](file:///D:\嘻嘻哈哈\Git\java\w8\Pair.java) - 存储键值对的泛型类
+3. [GenericUtils.java](file:///D:\嘻嘻哈哈\Git\java\w8\GenericUtils.java) - 包含泛型方法的工具类
+4. [GenericDemo.java](file:///D:\嘻嘻哈哈\Git\java\w8\GenericDemo.java) - 演示程序
+5. README.md - 本文档
+
+## 泛型类概述
+
+### Box<T>
+一个简单的泛型容器类，可以存储任意类型的对象。
+- 使用单个类型参数 T
+- 提供构造函数、getter、setter 方法
+- 判断是否为空的方法
+
+### Pair<K, V>
+一个存储键值对的泛型类，可以存储两个不同类型的对象。
+- 使用两个类型参数 K 和 V
+- 提供构造函数和 getter/setter 方法
+
+### GenericUtils
+一个包含泛型方法的工具类，展示了如何创建和使用泛型方法。
+- printArray: 打印任意类型数组的元素
+- swap: 交换数组中的任意两个元素
+- countListElements: 计算列表中的元素数量
+
+## 编译运行
+
+```bash
+# 编译所有 Java 文件
+javac Box.java Pair.java GenericUtils.java GenericDemo.java
+
+# 运行演示程序
+java GenericDemo
+```
+
+## 运行结果
+
+程序会展示泛型类的各种用法，包括：
+- Box 类存储不同类型的数据
+- Pair 类存储键值对
+- GenericUtils 的泛型方法的使用
+
+## 泛型的主要优点
+
+1. **类型安全**：编译时检查，避免运行时类型错误
+2. **代码复用**：一套代码支持多种数据类型
+3. **可读性**：更清晰的代码，更易理解
+4. **避免强制类型转换**：减少代码中的类型转换
--- a/w9/README.md
+++ b/w9/README.md
@ -0,0 +1,127 @@
+# 文章爬虫系统
+
+这是一个使用 Maven 创建的 Java 项目，实现了命令行界面的文章爬虫系统。
+
+## 项目结构
+
+```
+w9/
+├── pom.xml                                    # Maven 配置文件
+├── README.md                                  # 项目文档
+└── src/
+    └── main/
+        └── java/
+            └── com/
+                └── crawler/
+                    ├── Main.java              # 主程序入口
+                    ├── model/
+                    │   └── Article.java       # 文章数据模型
+                    ├── view/
+                    │   └── ConsoleView.java   # 控制台视图
+                    ├── command/
+                    │   ├── Command.java       # 命令接口
+                    │   ├── HelpCommand.java   # 帮助命令
+                    │   ├── ListCommand.java   # 列表命令
+                    │   ├── CrawlCommand.java  # 爬取命令
+                    │   └── ExitCommand.java   # 退出命令
+                    └── controller/
+                        └── CommandController.java  # 命令控制器
+```
+
+## 功能特性
+
+### 已实现的命令
+
+1. **help** - 显示帮助信息
+2. **list** - 显示已抓取的文章列表
+3. **crawl** - 开始抓取文章（目前为存根实现）
+4. **exit** - 退出程序
+
+### 项目架构
+
+- **model**: 数据模型层 - 定义文章数据结构
+- **view**: 视图层 - 处理控制台输出
+- **command**: 命令层 - 实现各种命令
+- **controller**: 控制层 - 管理命令执行
+
+## 编译运行
+
+### 编译项目
+
+```bash
+cd w9
+mvn clean compile
+```
+
+### 运行项目
+
+```bash
+mvn exec:java
+```
+
+或者先打包再运行：
+
+```bash
+mvn package
+java -jar target/crawler-app-1.0-SNAPSHOT.jar
+```
+
+## 使用示例
+
+```
+================================================
+      欢迎使用文章爬虫系统
+================================================
+
+可用命令:
+  help  - 显示帮助信息
+  list  - 显示已抓取的文章列表
+  crawl - 开始抓取文章
+  exit  - 退出程序
+
+请输入命令 > help
+
+可用命令:
+  help  - 显示帮助信息
+  list  - 显示已抓取的文章列表
+  crawl - 开始抓取文章
+  exit  - 退出程序
+
+请输入命令 > crawl
+
+正在开始抓取文章...
+抓取完成，共抓取了 3 篇文章
+
+请输入命令 > list
+
+已抓取的文章列表:
+----------------------------------------
+1. 示例文章1
+   URL: https://example.com/article1
+----------------------------------------
+2. 示例文章2
+   URL: https://example.com/article2
+----------------------------------------
+3. 示例文章3
+   URL: https://example.com/article3
+----------------------------------------
+共 3 篇文章
+
+请输入命令 > exit
+
+感谢使用，再见！
+```
+
+## 技术栈
+
+- Java 8
+- Maven 3.x
+
+## 扩展功能
+
+当前 crawl 命令是存根实现，可以扩展为：
+
+1. 连接实际的文章网站
+2. 解析 HTML 内容
+3. 提取文章标题、URL、内容等
+4. 保存到数据库或文件
--- a/w9/RUNNING.md
+++ b/w9/RUNNING.md
@ -0,0 +1,167 @@
+# Maven 项目运行说明
+
+## 项目已成功创建并测试完成
+
+### 项目信息
+
+- **项目类型**: Maven Java 项目
+- **包结构**: com.crawler
+- **功能**: 命令行文章爬虫系统
+
+### 已实现的包结构
+
+```
+w9/
+├── pom.xml                                    # Maven 配置文件
+├── README.md                                  # 详细项目文档
+├── test.bat                                  # Windows 测试脚本
+└── src/
+    └── main/
+        └── java/
+            └── com/
+                └── crawler/
+                    ├── Main.java              # 主程序入口，包含命令循环
+                    ├── model/
+                    │   └── Article.java       # 文章数据模型
+                    ├── view/
+                    │   └── ConsoleView.java   # 控制台视图（用户界面）
+                    ├── command/
+                    │   ├── Command.java       # 命令接口
+                    │   ├── HelpCommand.java   # help 命令实现
+                    │   ├── ListCommand.java   # list 命令实现
+                    │   ├── CrawlCommand.java  # crawl 命令实现
+                    │   └── ExitCommand.java   # exit 命令实现
+                    └── controller/
+                        └── CommandController.java  # 命令控制器
+```
+
+### 已实现的 4 个命令
+
+1. **help** - 显示所有可用命令的帮助信息
+2. **list** - 显示已抓取的文章列表（目前为存根）
+3. **crawl** - 开始抓取文章（目前为存根实现，添加3篇示例文章）
+4. **exit** - 退出程序
+
+### 运行方法
+
+#### 方法一：使用 Java 编译器直接运行（已测试）
+
+```bash
+# 1. 编译项目
+cd D:\嘻嘻哈哈\Git\java\w9\src\main\java
+javac -d ../../../../target/classes -cp . com/crawler/model/Article.java com/crawler/view/ConsoleView.java com/crawler/command/*.java com/crawler/controller/*.java com/crawler/Main.java
+
+# 2. 运行程序
+java -cp ../../../../target/classes com.crawler.Main
+```
+
+#### 方法二：使用 Maven 运行（需要配置 JAVA_HOME）
+
+```bash
+# 设置 JAVA_HOME
+set JAVA_HOME=你的Java安装路径
+
+# 编译项目
+cd w9
+mvn clean compile
+
+# 运行程序
+mvn exec:java
+```
+
+### 测试结果
+
+程序已成功运行，所有命令都正常工作：
+
+```
+================================================
+      欢迎使用文章爬虫系统
+================================================
+
+可用命令:
+  help  - 显示帮助信息
+  list  - 显示已抓取的文章列表
+  crawl - 开始抓取文章
+  exit  - 退出程序
+
+请输入命令 > help
+可用命令:
+  help  - 显示帮助信息
+  list  - 显示已抓取的文章列表
+  crawl - 开始抓取文章
+  exit  - 退出程序
+
+请输入命令 > list
+已抓取的文章列表:
+----------------------------------------
+暂无已抓取的文章
+共 0 篇文章
+
+请输入命令 > crawl
+正在开始抓取文章...
+抓取完成，共抓取了 3 篇文章
+
+请输入命令 > list
+已抓取的文章列表:
+----------------------------------------
+1. 示例文章1
+   URL: https://example.com/article1
+----------------------------------------
+2. 示例文章2
+   URL: https://example.com/article2
+----------------------------------------
+3. 示例文章3
+   URL: https://example.com/article3
+----------------------------------------
+共 3 篇文章
+
+请输入命令 > exit
+感谢使用，再见！
+```
+
+### 项目架构说明
+
+#### MVC 架构模式
+
+- **Model (模型层)**: `model/Article.java` - 数据模型
+- **View (视图层)**: `view/ConsoleView.java` - 用户界面输出
+- **Controller (控制层)**: `controller/CommandController.java` - 命令调度
+
+#### 命令模式
+
+- **Command 接口**: 定义命令的基本结构
+- **具体命令类**: HelpCommand, ListCommand, CrawlCommand, ExitCommand
+- **命令控制器**: 管理命令的注册和执行
+
+### 扩展建议
+
+当前 crawl 命令是存根实现，可以扩展为：
+
+1. **网络爬虫**: 添加 Jsoup 依赖，实现真实的网页爬取
+2. **数据存储**: 将抓取的文章保存到文件或数据库
+3. **多线程**: 使用 ExecutorService 实现并行爬取
+4. **配置管理**: 添加配置文件管理爬取规则
+5. **日志系统**: 使用 SLF4J 添加日志记录
+
+### Maven 依赖配置
+
+如需添加 Jsoup 依赖，可以在 pom.xml 中添加：
+
+```xml
+<dependencies>
+    <dependency>
+        <groupId>org.jsoup</groupId>
+        <artifactId>jsoup</artifactId>
+        <version>1.17.2</version>
+    </dependency>
+</dependencies>
+```
+
+### 总结
+
+✅ Maven 项目结构已创建
+✅ 完整的包结构 (model/view/command/controller) 已实现
+✅ 4 个命令已全部实现并测试通过
+✅ list 命令可展示已抓取的文章
+✅ 命令循环运行正常
+✅ 所有文件已保存在 w9 目录中
--- a/w9/pom.xml
+++ b/w9/pom.xml
@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
+         http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.example</groupId>
+    <artifactId>crawler-app</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>1.6.0</version>
+                <configuration>
+                    <mainClass>com.crawler.Main</mainClass>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>
--- a/w9/src/main/java/com/crawler/Main.java
+++ b/w9/src/main/java/com/crawler/Main.java
@ -0,0 +1,43 @@
+package com.crawler;
+
+import com.crawler.command.*;
+import com.crawler.controller.CommandController;
+import com.crawler.model.Article;
+import com.crawler.view.ConsoleView;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+public class Main {
+    public static void main(String[] args) {
+        // 初始化组件
+        ConsoleView view = new ConsoleView();
+        List<Article> articles = new ArrayList<>();
+        boolean[] running = {true};
+        
+        // 创建控制器
+        CommandController controller = new CommandController(view);
+        
+        // 注册命令
+        controller.registerCommand(new HelpCommand(view));
+        controller.registerCommand(new ListCommand(view, articles));
+        controller.registerCommand(new CrawlCommand(view, articles));
+        controller.registerCommand(new ExitCommand(view, running));
+        
+        // 显示欢迎信息
+        view.showWelcome();
+        view.showHelp();
+        
+        // 创建扫描器读取用户输入
+        Scanner scanner = new Scanner(System.in);
+        
+        // 命令循环
+        while (running[0]) {
+            view.showPrompt();
+            String input = scanner.nextLine();
+            controller.executeCommand(input);
+        }
+        
+        scanner.close();
+    }
+}
--- a/w9/src/main/java/com/crawler/command/Command.java
+++ b/w9/src/main/java/com/crawler/command/Command.java
@ -0,0 +1,6 @@
+package com.crawler.command;
+
+public interface Command {
+    String getName();
+    void execute();
+}
--- a/w9/src/main/java/com/crawler/command/CrawlCommand.java
+++ b/w9/src/main/java/com/crawler/command/CrawlCommand.java
@ -0,0 +1,36 @@
+package com.crawler.command;
+
+import com.crawler.model.Article;
+import com.crawler.view.ConsoleView;
+import java.util.List;
+
+public class CrawlCommand implements Command {
+    private ConsoleView view;
+    private List<Article> articles;
+
+    public CrawlCommand(ConsoleView view, List<Article> articles) {
+        this.view = view;
+        this.articles = articles;
+    }
+
+    @Override
+    public String getName() {
+        return "crawl";
+    }
+
+    @Override
+    public void execute() {
+        view.showCrawlStart();
+        
+        // 这里是存根实现，实际可以在这里调用爬虫逻辑
+        Article article1 = new Article("示例文章1", "https://example.com/article1");
+        Article article2 = new Article("示例文章2", "https://example.com/article2");
+        Article article3 = new Article("示例文章3", "https://example.com/article3");
+        
+        articles.add(article1);
+        articles.add(article2);
+        articles.add(article3);
+        
+        view.showCrawlComplete(articles.size());
+    }
+}
--- a/w9/src/main/java/com/crawler/command/ExitCommand.java
+++ b/w9/src/main/java/com/crawler/command/ExitCommand.java
@ -0,0 +1,24 @@
+package com.crawler.command;
+
+import com.crawler.view.ConsoleView;
+
+public class ExitCommand implements Command {
+    private ConsoleView view;
+    private boolean[] running;
+
+    public ExitCommand(ConsoleView view, boolean[] running) {
+        this.view = view;
+        this.running = running;
+    }
+
+    @Override
+    public String getName() {
+        return "exit";
+    }
+
+    @Override
+    public void execute() {
+        view.showGoodbye();
+        running[0] = false;
+    }
+}
--- a/w9/src/main/java/com/crawler/command/HelpCommand.java
+++ b/w9/src/main/java/com/crawler/command/HelpCommand.java
@ -0,0 +1,21 @@
+package com.crawler.command;
+
+import com.crawler.view.ConsoleView;
+
+public class HelpCommand implements Command {
+    private ConsoleView view;
+
+    public HelpCommand(ConsoleView view) {
+        this.view = view;
+    }
+
+    @Override
+    public String getName() {
+        return "help";
+    }
+
+    @Override
+    public void execute() {
+        view.showHelp();
+    }
+}
--- a/w9/src/main/java/com/crawler/command/ListCommand.java
+++ b/w9/src/main/java/com/crawler/command/ListCommand.java
@ -0,0 +1,25 @@
+package com.crawler.command;
+
+import com.crawler.model.Article;
+import com.crawler.view.ConsoleView;
+import java.util.List;
+
+public class ListCommand implements Command {
+    private ConsoleView view;
+    private List<Article> articles;
+
+    public ListCommand(ConsoleView view, List<Article> articles) {
+        this.view = view;
+        this.articles = articles;
+    }
+
+    @Override
+    public String getName() {
+        return "list";
+    }
+
+    @Override
+    public void execute() {
+        view.showArticles(articles);
+    }
+}
--- a/w9/src/main/java/com/crawler/controller/CommandController.java
+++ b/w9/src/main/java/com/crawler/controller/CommandController.java
@ -0,0 +1,39 @@
+package com.crawler.controller;
+
+import com.crawler.command.Command;
+import com.crawler.view.ConsoleView;
+import java.util.HashMap;
+import java.util.Map;
+
+public class CommandController {
+    private Map<String, Command> commands;
+    private ConsoleView view;
+
+    public CommandController(ConsoleView view) {
+        this.view = view;
+        this.commands = new HashMap<>();
+    }
+
+    public void registerCommand(Command command) {
+        commands.put(command.getName(), command);
+    }
+
+    public void executeCommand(String input) {
+        String commandName = input.trim().toLowerCase();
+        
+        if (commandName.isEmpty()) {
+            return;
+        }
+
+        Command command = commands.get(commandName);
+        if (command != null) {
+            command.execute();
+        } else {
+            view.showUnknownCommand(commandName);
+        }
+    }
+
+    public boolean hasCommand(String commandName) {
+        return commands.containsKey(commandName);
+    }
+}
--- a/w9/src/main/java/com/crawler/model/Article.java
+++ b/w9/src/main/java/com/crawler/model/Article.java
@ -0,0 +1,55 @@
+package com.crawler.model;
+
+public class Article {
+    private String title;
+    private String url;
+    private String content;
+    private long timestamp;
+
+    public Article(String title, String url) {
+        this.title = title;
+        this.url = url;
+        this.timestamp = System.currentTimeMillis();
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public long getTimestamp() {
+        return timestamp;
+    }
+
+    public void setTimestamp(long timestamp) {
+        this.timestamp = timestamp;
+    }
+
+    @Override
+    public String toString() {
+        return "Article{" +
+                "title='" + title + '\'' +
+                ", url='" + url + '\'' +
+                ", timestamp=" + timestamp +
+                '}';
+    }
+}
--- a/w9/src/main/java/com/crawler/view/ConsoleView.java
+++ b/w9/src/main/java/com/crawler/view/ConsoleView.java
@ -0,0 +1,60 @@
+package com.crawler.view;
+
+import com.crawler.model.Article;
+import java.util.List;
+
+public class ConsoleView {
+    public void showWelcome() {
+        System.out.println("================================================");
+        System.out.println("      欢迎使用文章爬虫系统");
+        System.out.println("================================================");
+        System.out.println();
+    }
+
+    public void showPrompt() {
+        System.out.print("请输入命令 > ");
+    }
+
+    public void showHelp() {
+        System.out.println("\n可用命令:");
+        System.out.println("  help  - 显示帮助信息");
+        System.out.println("  list  - 显示已抓取的文章列表");
+        System.out.println("  crawl - 开始抓取文章");
+        System.out.println("  exit  - 退出程序");
+        System.out.println();
+    }
+
+    public void showArticles(List<Article> articles) {
+        System.out.println("\n已抓取的文章列表:");
+        System.out.println("----------------------------------------");
+        
+        if (articles.isEmpty()) {
+            System.out.println("暂无已抓取的文章");
+        } else {
+            for (int i = 0; i < articles.size(); i++) {
+                Article article = articles.get(i);
+                System.out.println((i + 1) + ". " + article.getTitle());
+                System.out.println("   URL: " + article.getUrl());
+                System.out.println("----------------------------------------");
+            }
+        }
+        System.out.println("共 " + articles.size() + " 篇文章\n");
+    }
+
+    public void showCrawlStart() {
+        System.out.println("\n正在开始抓取文章...");
+    }
+
+    public void showCrawlComplete(int count) {
+        System.out.println("抓取完成，共抓取了 " + count + " 篇文章\n");
+    }
+
+    public void showGoodbye() {
+        System.out.println("\n感谢使用，再见！");
+    }
+
+    public void showUnknownCommand(String command) {
+        System.out.println("未知命令: " + command);
+        System.out.println("输入 'help' 查看可用命令\n");
+    }
+}
--- a/w9/test.bat
+++ b/w9/test.bat
@ -0,0 +1,10 @@
+@echo off
+cd /d "%~dp0src\main\java"
+echo help > input.txt
+echo list >> input.txt
+echo crawl >> input.txt
+echo list >> input.txt
+echo exit >> input.txt
+
+java -cp ..\..\..\..\target\classes com.crawler.Main < input.txt
+del input.txt