上传文件至 'w9'

w9/Article.java

@@ -0,0 +1,69 @@
+import java.util.Date;
+
+public class Article {
+    private String title;
+    private String content;
+    private String author;      // 新增字段：作者
+    private Date publishDate;   // 新增字段：发布日期
+    
+    public Article() {
+        this.publishDate = new Date(); // 默认使用当前时间
+    }
+    
+    public Article(String title, String content, String author) {
+        this.title = title;
+        this.content = content;
+        this.author = author;
+        this.publishDate = new Date();
+    }
+    
+    public Article(String title, String content, String author, Date publishDate) {
+        this.title = title;
+        this.content = content;
+        this.author = author;
+        this.publishDate = publishDate;
+    }
+    
+    // Getters and Setters
+    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() {
+        return "Article{" +
+                "title='" + title + '\'' +
+                ", content='" + content + '\'' +
+                ", author='" + author + '\'' +
+                ", publishDate=" + publishDate +
+                '}';
+    }
+}

w9/HistoryCommand.java

@@ -0,0 +1,96 @@
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+public class HistoryCommand {
+    // 使用List<String>存储所有输入的命令
+    private List<String> commandHistory;
+    
+    public HistoryCommand() {
+        this.commandHistory = new ArrayList<>();
+    }
+    
+    // 添加命令到历史记录
+    public void addCommand(String command) {
+        if (command != null && !command.trim().isEmpty()) {
+            commandHistory.add(command.trim());
+        }
+    }
+    
+    // 获取所有命令历史
+    public List<String> getCommandHistory() {
+        return new ArrayList<>(commandHistory); // 返回副本，防止外部修改
+    }
+    
+    // 获取命令数量
+    public int getCommandCount() {
+        return commandHistory.size();
+    }
+    
+    // 查看指定索引的命令
+    public String getCommand(int index) {
+        if (index >= 0 && index < commandHistory.size()) {
+            return commandHistory.get(index);
+        }
+        return null;
+    }
+    
+    // 清空命令历史
+    public void clearHistory() {
+        commandHistory.clear();
+    }
+    
+    // 显示最近的n条命令
+    public void showRecentCommands(int n) {
+        int start = Math.max(0, commandHistory.size() - n);
+        System.out.println("最近 " + (commandHistory.size() - start) + " 条命令：");
+        for (int i = start; i < commandHistory.size(); i++) {
+            System.out.println((i + 1) + ". " + commandHistory.get(i));
+        }
+    }
+    
+    // 显示所有命令历史
+    public void showAllCommands() {
+        System.out.println("所有命令历史（共 " + commandHistory.size() + " 条）：");
+        for (int i = 0; i < commandHistory.size(); i++) {
+            System.out.println((i + 1) + ". " + commandHistory.get(i));
+        }
+    }
+    
+    // 命令行交互测试
+    public static void main(String[] args) {
+        HistoryCommand history = new HistoryCommand();
+        Scanner scanner = new Scanner(System.in);
+        
+        System.out.println("命令历史记录器 - 输入 'exit' 退出，输入 'history' 查看历史记录");
+        
+        while (true) {
+            System.out.print("> ");
+            String input = scanner.nextLine();
+            
+            // 添加到历史记录
+            history.addCommand(input);
+            
+            if ("exit".equalsIgnoreCase(input)) {
+                System.out.println("退出程序...");
+                break;
+            } else if ("history".equalsIgnoreCase(input)) {
+                history.showAllCommands();
+            } else if (input.startsWith("history ")) {
+                try {
+                    int n = Integer.parseInt(input.substring(8).trim());
+                    history.showRecentCommands(n);
+                } catch (NumberFormatException e) {
+                    System.out.println("无效的数字格式");
+                }
+            } else if ("clear".equalsIgnoreCase(input)) {
+                history.clearHistory();
+                System.out.println("历史记录已清空");
+            } else {
+                System.out.println("执行命令: " + input);
+            }
+        }
+        
+        scanner.close();
+    }
+}