w9

w9/Article.java

@@ -0,0 +1,33 @@
+import java.time.LocalDate;
+
+public class Article {
+    private String title;
+    private String content;
+    private String url;
+
+    private String author;
+    private LocalDate publishDate;
+
+    public Article(String title, String content, String url, String author, LocalDate publishDate) {
+        this.title = title;
+        this.content = content;
+        this.url = url;
+        this.author = author;
+        this.publishDate = publishDate;
+    }
+
+    public String getAuthor() { 
+        return author; 
+    }
+    public void setAuthor(String author) { 
+        this.author = author; 
+    }
+
+    public LocalDate getPublishDate() {
+        return publishDate; 
+    }
+    public void setPublishDate(LocalDate publishDate) { 
+        this.publishDate = publishDate;
+    }
+
+}

w9/HistoryCommand.java

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+import java.util.ArrayList;
+import java.util.List;
+
+public class HistoryCommand {
+    // 用List<String>存储所有历史命令
+    private final List<String> commandHistory = new ArrayList<>();
+
+    // 添加命令
+    public void addCommand(String command) {
+        commandHistory.add(command);
+    }
+
+    // 获取所有历史命令
+    public List<String> getHistory() {
+        // 可选：返回副本，防止外部修改内部状态
+        return new ArrayList<>(commandHistory);
+    }
+
+    // 打印历史命令
+    public void printHistory() {
+        if (commandHistory.isEmpty()) {
+            System.out.println("暂无历史命令");
+            return;
+        }
+        for (int i = 0; i < commandHistory.size(); i++) {
+            System.out.printf("[%d] %s%n", i + 1, commandHistory.get(i));
+        }
+    }
+}