上传文件至 'w9'

w9/Article.java

@@ -0,0 +1,34 @@
+package Article;
+
+import java.time.LocalDate;
+
+public class Article {
+    private String title;
+    private String content;
+    private String author;
+    private LocalDate publishDate;
+
+    public Article(String title, String content, String author, LocalDate publishDate) {
+        this.title = title;
+        this.content = content;
+        this.author = author;
+        this.publishDate = publishDate;
+    }
+
+    // getters and setters
+    public String getTitle() { return title; }
+    public String getContent() { return content; }
+    public String getAuthor() { return author; }
+    public LocalDate getPublishDate() { return publishDate; }
+
+    public void setTitle(String title) { this.title = title; }
+    public void setContent(String content) { this.content = content; }
+    public void setAuthor(String author) { this.author = author; }
+    public void setPublishDate(LocalDate publishDate) { this.publishDate = publishDate; }
+
+    @Override
+    public String toString() {
+        return String.format("Article{title='%s', author='%s', publishDate=%s}",
+                title, author, publishDate);
+    }
+}

w9/HistoryCommand.java

@@ -0,0 +1,40 @@
+package Article;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class HistoryCommand {
+    private List<String> commandHistory;
+
+    public HistoryCommand() {
+        this.commandHistory = new ArrayList<>();
+    }
+
+    public void addCommand(String command) {
+        if (command != null && !command.trim().isEmpty()) {
+            commandHistory.add(command);
+        }
+    }
+
+    public List<String> getAllCommands() {
+        return new ArrayList<>(commandHistory); // 返回副本，保护内部数据
+    }
+
+    public String getLastCommand() {
+        return commandHistory.isEmpty() ? null : commandHistory.get(commandHistory.size() - 1);
+    }
+
+    public void printHistory() {
+        for (int i = 0; i < commandHistory.size(); i++) {
+            System.out.println((i + 1) + ". " + commandHistory.get(i));
+        }
+    }
+
+    public void clear() {
+        commandHistory.clear();
+    }
+
+    public int size() {
+        return commandHistory.size();
+    }
+}