添加 'w9'

w9

@@ -0,0 +1,28 @@
+public class Article {
+    private String title;
+    private String url;
+    private String author;        // 新增
+    private String publishDate;   // 新增
+
+    // 构造器、getter/setter 相应更新
+}
+import java.util.ArrayList;
+import java.util.List;
+
+public class HistoryCommand {
+    private List<String> commandHistory = new ArrayList<>();
+
+    public void addCommand(String cmd) {
+        commandHistory.add(cmd);
+    }
+
+    public List<String> getCommandHistory() {
+        return new ArrayList<>(commandHistory); // 返回副本，防止外部修改
+    }
+
+    public void printHistory() {
+        for (int i = 0; i < commandHistory.size(); i++) {
+            System.out.println((i+1) + ": " + commandHistory.get(i));
+        }
+    }
+}