上传文件至 'W9-李思彤-202506050313'

W9-李思彤-202506050313/Article.java

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+package model;
+
+import java.util.Date;
+
+public class Article {
+    private String title;
+    private String content;
+    private String url;
+    // 新增字段
+    private String author;
+    private Date publishDate;
+
+    // 无参构造
+    public Article() {}
+
+    // 全参构造（方便赋值）
+    public Article(String title, String content, String url, String author, Date publishDate) {
+        this.title = title;
+        this.content = content;
+        this.url = url;
+        this.author = author;
+        this.publishDate = publishDate;
+    }
+
+    // getter & setter
+    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 getUrl() { return url; }
+    public void setUrl(String url) { this.url = url; }
+    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; }
+}

W9-李思彤-202506050313/HistoryCommand.java

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+package model;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 单例模式：全局唯一记录用户所有输入命令
+ */
+public class HistoryCommand {
+    // 保存所有命令
+    private final List<String> commandList;
+
+    // 单例实例
+    private static HistoryCommand instance;
+
+    // 私有构造
+    private HistoryCommand() {
+        commandList = new ArrayList<>();
+    }
+
+    // 获取唯一实例
+    public static HistoryCommand getInstance() {
+        if (instance == null) {
+            instance = new HistoryCommand();
+        }
+        return instance;
+    }
+
+    // 添加命令
+    public void addCommand(String command) {
+        commandList.add(command);
+    }
+
+    // 获取所有历史命令
+    public List<String> getAllCommand() {
+        return commandList;
+    }
+}