RBAC权限控制初步实现

src/main/java/com/example/springdemo/utils/PermissionInterceptor.java

@@ -0,0 +1,23 @@
+package com.example.springdemo.utils;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import jakarta.servlet.http.HttpSession;
+import org.jetbrains.annotations.NotNull;
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.HandlerInterceptor;
+
+@Component
+public class PermissionInterceptor implements HandlerInterceptor {
+    @Override
+    public boolean preHandle(@NotNull HttpServletRequest request,
+                             @NotNull HttpServletResponse response,
+                             @NotNull Object handler) throws Exception {
+        HttpSession session = request.getSession();
+        if (session.getAttribute("users") == null) {
+            response.sendRedirect("/login");
+            return false;
+        }
+        return true;
+    }
+}