diff --git a/spring-session-samples/spring-session-sample-boot-redis-json/src/main/java/sample/web/SecurityControllerAdvise.java b/spring-session-samples/spring-session-sample-boot-redis-json/src/main/java/sample/web/SecurityControllerAdvise.java
new file mode 100644
index 00000000..36bee1a7
--- /dev/null
+++ b/spring-session-samples/spring-session-sample-boot-redis-json/src/main/java/sample/web/SecurityControllerAdvise.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2014-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sample.web;
+
+import java.security.Principal;
+
+import jakarta.servlet.http.HttpSession;
+
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ModelAttribute;
+
+/**
+ * {@link ControllerAdvice} to expose user related attributes.
+ *
+ * @author Rob Winch
+ */
+@ControllerAdvice
+public class SecurityControllerAdvise {
+
+	@ModelAttribute("currentUserName")
+	String currentUser(Principal principal) {
+		return (principal != null) ? principal.getName() : null;
+	}
+
+	@ModelAttribute("httpSession")
+	HttpSession httpSession(HttpSession httpSession) {
+		return httpSession;
+	}
+
+}
diff --git a/spring-session-samples/spring-session-sample-boot-redis-json/src/main/resources/templates/home.html b/spring-session-samples/spring-session-sample-boot-redis-json/src/main/resources/templates/home.html
index 3e8a5df9..3345c95f 100644
--- a/spring-session-samples/spring-session-sample-boot-redis-json/src/main/resources/templates/home.html
+++ b/spring-session-samples/spring-session-sample-boot-redis-json/src/main/resources/templates/home.html
@@ -23,9 +23,9 @@
 				</tr>
 			</thead>
 			<tbody>
-				<tr th:each="name : ${T(java.util.Collections).list(#httpSession.getAttributeNames())}">
+				<tr th:each="name : ${T(org.springframework.util.CollectionUtils).toIterator(httpSession?.getAttributeNames())}">
 					<td th:text="${name}"></td>
-					<td th:text="${#httpSession.getAttribute(name)}"></td>
+					<td th:text="${httpSession.getAttribute(name)}"></td>
 				</tr>
 			</tbody>
 		</table>
diff --git a/spring-session-samples/spring-session-sample-boot-redis-json/src/main/resources/templates/layout.html b/spring-session-samples/spring-session-sample-boot-redis-json/src/main/resources/templates/layout.html
index 2be5f82f..1dcea365 100644
--- a/spring-session-samples/spring-session-sample-boot-redis-json/src/main/resources/templates/layout.html
+++ b/spring-session-samples/spring-session-sample-boot-redis-json/src/main/resources/templates/layout.html
@@ -81,13 +81,12 @@
 					<div class="container">
 						<a class="brand" th:href="@{/}"><img th:src="@{/images/logo.png}" alt="Spring Security Sample"/></a>
 
-<div class="nav-collapse collapse"
-		th:with="currentUser=${#httpServletRequest.userPrincipal?.principal}">
-	<div th:if="${currentUser != null}">
+<div class="nav-collapse collapse">
+	<div th:if="${currentUserName != null}">
 			<form class="navbar-form pull-right" th:action="@{/logout}" method="post">
 					<input type="submit" value="Log out" />
 			</form>
-			<p id="un" class="navbar-text pull-right" th:text="${currentUser.username}">
+			<p id="un" class="navbar-text pull-right" th:text="${currentUserName}">
 				sample_user
 			</p>
 	</div>