From 9375900290b66e84bd85812d239ffb1d848daeff Mon Sep 17 00:00:00 2001
From: Wangyanshu <2680603193@qq.com>
Date: Thu, 7 May 2026 15:00:22 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=20'=E5=91=BD=E4=BB=A4?=
 =?UTF-8?q?=E5=88=AB=E5=90=8D+URL=E5=B7=A5=E5=85=B7=E7=B1=BB'?=
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---
 命令别名+URL工具类 | 40 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 命令别名+URL工具类

diff --git a/命令别名+URL工具类 b/命令别名+URL工具类
new file mode 100644
index 0000000..8fcb4fd
--- /dev/null
+++ b/命令别名+URL工具类
@@ -0,0 +1,40 @@
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+public class CommandUtil {
+    // 命令别名映射
+    private static Map<String,String> aliasMap;
+    // URL正则校验
+    private static final Pattern URL_REG = Pattern.compile("^https?://.+");
+
+    static {
+        aliasMap = new HashMap<>();
+        // 作业要求：别名 c 代表 crawl
+        aliasMap.put("c", "crawl");
+        // 可扩展其他别名
+        aliasMap.put("h", "history");
+        aliasMap.put("e", "exit");
+    }
+
+    // 解析别名，返回真实命令
+    public static String parseAlias(String input) {
+        String[] arr = input.split(" ", 2);
+        String cmd = arr[0];
+        // 如果有别名就替换
+        if(aliasMap.containsKey(cmd)){
+            cmd = aliasMap.get(cmd);
+        }
+        // 拼接参数
+        if(arr.length > 1){
+            return cmd + " " + arr[1];
+        }
+        return cmd;
+    }
+
+    // 校验URL是否合法
+    public static boolean checkUrl(String url) {
+        if(url == null || url.isBlank()) return false;
+        return URL_REG.matcher(url).matches();
+    }
+}
\ No newline at end of file