diff --git a/demo2/java9-example/pom.xml b/demo2/java9-example/pom.xml
index 220cf1b..65b5511 100644
--- a/demo2/java9-example/pom.xml
+++ b/demo2/java9-example/pom.xml
@@ -15,6 +15,15 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.9.2</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
     <build>
         <plugins>
             <plugin>
diff --git a/demo2/java9-example/src/main/java/top/yexuejc/demo/StackWalkerDemo.java b/demo2/java9-example/src/main/java/top/yexuejc/demo/StackWalkerDemo.java
index d8c39ba..a1096e8 100644
--- a/demo2/java9-example/src/main/java/top/yexuejc/demo/StackWalkerDemo.java
+++ b/demo2/java9-example/src/main/java/top/yexuejc/demo/StackWalkerDemo.java
@@ -1,6 +1,7 @@
 package top.yexuejc.demo;
 
 import java.lang.StackWalker;
+import java.util.stream.Collectors;
 
 public class StackWalkerDemo {
     public static void main(String[] args) {
@@ -22,11 +23,17 @@ public class StackWalkerDemo {
                 .walk(stackFrameStream ->
                     stackFrameStream
                             .filter(frame -> frame.getClassName().contains("StackWalkerDemo"))
-                            .peek(frame -> System.out.println(frame.getClassName() + "." + frame.getMethodName()))
-                );
+                            .map(frame -> frame.getClassName() + "." + frame.getMethodName())
+                            .collect(Collectors.toList())
+                ).forEach(System.out::println);
 
         System.out.println("\n=== 调用者信息 ===");
         // 获取直接调用者信息
-        StackWalker.getInstance().walk(stackStream -> stackStream.skip(1).findFirst()).ifPresent(caller -> System.out.println("调用者: " + caller.getClassName() + "." + caller.getMethodName()));
+        StackWalker.getInstance()
+                .walk(stackStream ->
+                        stackStream.skip(1).findFirst()
+                ).ifPresent(caller ->
+                        System.out.println("调用者: " + caller.getClassName() + "." + caller.getMethodName())
+                );
     }
 }
diff --git a/demo2/java9-example/src/test/java/top/yexuejc/demo/StackWalkerDemoTest.java b/demo2/java9-example/src/test/java/top/yexuejc/demo/StackWalkerDemoTest.java
new file mode 100644
index 0000000..acaa69f
--- /dev/null
+++ b/demo2/java9-example/src/test/java/top/yexuejc/demo/StackWalkerDemoTest.java
@@ -0,0 +1,16 @@
+package top.yexuejc.demo;
+
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * @author maxiaofeng
+ * @date 2025/8/11 9:20
+ */
+class StackWalkerDemoTest {
+
+    @Test
+    void methodA() {
+        StackWalkerDemo.methodA();
+    }
+}
\ No newline at end of file
diff --git a/demo3/pom.xml b/demo3/pom.xml
new file mode 100644
index 0000000..1306456
--- /dev/null
+++ b/demo3/pom.xml
@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.5.3</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>top.yexuejc</groupId>
+    <artifactId>demo3</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>demo3</name>
+    <description>demo3</description>
+    <url/>
+    <licenses>
+        <license/>
+    </licenses>
+    <developers>
+        <developer/>
+    </developers>
+    <scm>
+        <connection/>
+        <developerConnection/>
+        <tag/>
+        <url/>
+    </scm>
+    <properties>
+        <java.version>21</java.version>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.30</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>nz.net.ultraq.thymeleaf</groupId>
+            <artifactId>thymeleaf-layout-dialect</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.thymeleaf.extras</groupId>
+            <artifactId>thymeleaf-extras-springsecurity6</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+        </dependency>
+        <!-- 项目热部署 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-devtools</artifactId>
+            <optional>true</optional> <!-- 表示依赖不会传递 -->
+            <scope>true</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>