From c38adb048dd3b5f3f14da30b71025680ae40d8c6 Mon Sep 17 00:00:00 2001
From: Chengwuyi <3394813085@qq.com>
Date: Sat, 30 May 2026 22:08:03 +0800
Subject: [PATCH] =?UTF-8?q?=E4=B8=8A=E4=BC=A0=E6=96=87=E4=BB=B6=E8=87=B3?=
 =?UTF-8?q?=20'w9'?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 w9/ExitCommand.java    | 14 ++++++++++++++
 w9/HelpCommand.java    | 18 ++++++++++++++++++
 w9/HistoryCommand.java | 29 +++++++++++++++++++++++++++++
 w9/ListCommand.java    | 13 +++++++++++++
 4 files changed, 74 insertions(+)
 create mode 100644 w9/ExitCommand.java
 create mode 100644 w9/HelpCommand.java
 create mode 100644 w9/HistoryCommand.java
 create mode 100644 w9/ListCommand.java

diff --git a/w9/ExitCommand.java b/w9/ExitCommand.java
new file mode 100644
index 0000000..544d801
--- /dev/null
+++ b/w9/ExitCommand.java
@@ -0,0 +1,14 @@
+import java.util.List;
+
+public class ExitCommand implements Command {
+    private final ConsoleView view;
+    public ExitCommand(ConsoleView v) { this.view = v; }
+
+    @Override public String getName() { return "exit"; }
+
+    @Override
+    public void execute(String[] args, List<Article> articles) {
+        view.printSuccess("Bye!");
+        System.exit(0);
+    }
+}
diff --git a/w9/HelpCommand.java b/w9/HelpCommand.java
new file mode 100644
index 0000000..e053fa9
--- /dev/null
+++ b/w9/HelpCommand.java
@@ -0,0 +1,18 @@
+import java.util.List;
+
+public class HelpCommand implements Command {
+    private final ConsoleView view;
+    public HelpCommand(ConsoleView v) { this.view = v; }
+
+    @Override public String getName() { return "help"; }
+
+    @Override
+    public void execute(String[] args, List<Article> articles) {
+        view.printInfo("可用命令：");
+        view.printInfo("  crawl <url>   抓取指定 URL 的文章 (别名: c)");
+        view.printInfo("  list          列出所有已抓取的文章");
+        view.printInfo("  history       显示历史命令记录");
+        view.printInfo("  help          显示帮助信息");
+        view.printInfo("  exit          退出程序");
+    }
+}
diff --git a/w9/HistoryCommand.java b/w9/HistoryCommand.java
new file mode 100644
index 0000000..a4ebd93
--- /dev/null
+++ b/w9/HistoryCommand.java
@@ -0,0 +1,29 @@
+import java.util.List;
+
+/**
+ * 作业2：HistoryCommand
+ * 记录并展示用户输入过的所有命令（用 List<String> 存储）
+ */
+public class HistoryCommand implements Command {
+    private final ConsoleView view;
+    private final List<String> history;   // 由 Controller 注入，共享同一个列表
+
+    public HistoryCommand(ConsoleView v, List<String> history) {
+        this.view    = v;
+        this.history = history;
+    }
+
+    @Override public String getName() { return "history"; }
+
+    @Override
+    public void execute(String[] args, List<Article> articles) {
+        if (history.isEmpty()) {
+            view.printInfo("暂无历史记录。");
+            return;
+        }
+        view.printBold("── 历史命令 (" + history.size() + " 条) ──");
+        for (int i = 0; i < history.size(); i++) {
+            view.printInfo(String.format("%3d  %s", i + 1, history.get(i)));
+        }
+    }
+}
diff --git a/w9/ListCommand.java b/w9/ListCommand.java
new file mode 100644
index 0000000..8adcc17
--- /dev/null
+++ b/w9/ListCommand.java
@@ -0,0 +1,13 @@
+import java.util.List;
+
+public class ListCommand implements Command {
+    private final ConsoleView view;
+    public ListCommand(ConsoleView v) { this.view = v; }
+
+    @Override public String getName() { return "list"; }
+
+    @Override
+    public void execute(String[] args, List<Article> articles) {
+        view.display(articles);
+    }
+}