diff --git a/Main.java b/Main.java
index 1a68b2dd0a36d3447eed91dc217b0ec3bb12c172..c7cc4e20d8c902e7738ab1fbd4a43bd2ba721711 100644
--- a/Main.java
+++ b/Main.java
@@ -1,5 +1,13 @@
-class Main {
-  public static void main(String[] args) {
-    System.out.println("Hello world!");
-  }
+public class LoginInterceptor implements HandlerInterceptor {
+    @Override
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
+        // 判断用户是否登录，这里使用 sa-token 提供的方法进行判断
+        if (StpUtil.isLogin()) {
+            return true; // 已登录，放行
+        } else {
+            // 未登录，重定向到登录页
+            response.sendRedirect("/login");
+            return false;
+        }
+    }
 }
\ No newline at end of file