diff --git a/build.gradle b/build.gradle
index a1766ad..2d26eef 100644
--- a/build.gradle
+++ b/build.gradle
@@ -18,22 +18,45 @@ repositories {
     mavenCentral()
 }
 
+ext {
+    // https://spring.io/projects/spring-cloud
+    springCloudVersion = 'Finchley.RELEASE'
+
+}
+
+//dependencyManagement {
+//    imports {
+//        mavenBom "org.springframework.cloud"
+//    }
+//}
+
 dependencies {
     // Spring Batch
     implementation 'org.springframework.boot:spring-boot-starter-batch'
     // Spring Data JPA
     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    // validation
+    implementation 'org.springframework.boot:spring-boot-starter-validation'
     // h2 DB
     implementation 'com.h2database:h2'
-    // 스프링 웹
+    // web
     implementation 'org.springframework.boot:spring-boot-starter-web'
+
     // 롬복
     compileOnly 'org.projectlombok:lombok'
     annotationProcessor 'org.projectlombok:lombok'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
+
     // mariadb
     implementation 'org.mariadb.jdbc:mariadb-java-client:2.7.4'
 
+// https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-openfeign
+//    implementation 'org.springframework.cloud:spring-cloud-starter-openfeign:4.1.2'
+
+
+    // swagger
+    implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.0.4'
+
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
 
diff --git a/src/main/java/com/example/play_ground/spring/validation/Bar.java b/src/main/java/com/example/play_ground/spring/validation/Bar.java
new file mode 100644
index 0000000..97f5b3e
--- /dev/null
+++ b/src/main/java/com/example/play_ground/spring/validation/Bar.java
@@ -0,0 +1,12 @@
+package com.example.play_ground.spring.validation;
+
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.NotNull;
+
+public record Bar(
+        @NotNull
+        String bar,
+        @Valid
+        FooBar fooBar
+) {
+}
diff --git a/src/main/java/com/example/play_ground/spring/validation/Foo.java b/src/main/java/com/example/play_ground/spring/validation/Foo.java
new file mode 100644
index 0000000..f3ccf5b
--- /dev/null
+++ b/src/main/java/com/example/play_ground/spring/validation/Foo.java
@@ -0,0 +1,15 @@
+package com.example.play_ground.spring.validation;
+
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.NotNull;
+import org.springframework.validation.annotation.Validated;
+
+@Validated
+public record Foo(
+        @NotNull
+        String foo,
+        @NotNull
+        @Valid
+        Bar bar
+) {
+}
diff --git a/src/main/java/com/example/play_ground/spring/validation/FooBar.java b/src/main/java/com/example/play_ground/spring/validation/FooBar.java
new file mode 100644
index 0000000..b4132a5
--- /dev/null
+++ b/src/main/java/com/example/play_ground/spring/validation/FooBar.java
@@ -0,0 +1,9 @@
+package com.example.play_ground.spring.validation;
+
+import jakarta.validation.constraints.NotNull;
+
+public record FooBar(
+        @NotNull
+        String fooBar
+) {
+}
diff --git a/src/main/java/com/example/play_ground/spring/validation/FooBarClient.java b/src/main/java/com/example/play_ground/spring/validation/FooBarClient.java
new file mode 100644
index 0000000..92412a7
--- /dev/null
+++ b/src/main/java/com/example/play_ground/spring/validation/FooBarClient.java
@@ -0,0 +1,13 @@
+package com.example.play_ground.spring.validation;
+
+import jakarta.validation.Valid;
+import lombok.extern.log4j.Log4j2;
+import org.springframework.validation.annotation.Validated;
+
+@Log4j2
+@Validated
+public class FooBarClient {
+    void foo(@Valid Foo foo){
+        log.info(foo);
+    }
+}
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 7af5041..c3f6ce0 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -1,9 +1,3 @@
-spring:
-  profiles:
-    active: mariadb
-
----
-
 spring:
   profiles:
     active: local
@@ -16,27 +10,6 @@ spring:
   batch:
     job:
       enabled: true
-
----
-
-spring:
-  profiles:
-    active: mariadb
-  datasource:
-    hikari:
-      jdbc-url: jdbc:mariadb://localhost:3306/commerce
-      username: root
-      password: 221031
-      driver-class-name: org.mariadb.jdbc.Driver
-  jpa:
-    hibernate:
-      ddl-auto: create
-    properties:
-      hibernate:
-        show_sql: true
-        format_sql: true
-  batch:
-    job:
-      enabled: true
-    jdbc:
-      initialize-schema: always
+  h2:
+    console :
+      enabled: true
\ No newline at end of file
diff --git a/src/test/java/com/example/play_ground/spring/validation/FooBarClientTest.java b/src/test/java/com/example/play_ground/spring/validation/FooBarClientTest.java
new file mode 100644
index 0000000..e4e3ef2
--- /dev/null
+++ b/src/test/java/com/example/play_ground/spring/validation/FooBarClientTest.java
@@ -0,0 +1,27 @@
+package com.example.play_ground.spring.validation;
+
+import jakarta.validation.ConstraintViolation;
+import jakarta.validation.Validation;
+import jakarta.validation.Validator;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+class FooBarClientTest {
+    Validator validator;
+    @BeforeEach
+    void setUp() {
+        validator = Validation.buildDefaultValidatorFactory().getValidator();
+    }
+
+    @Test
+    void validated() {
+        Bar bar = new Bar("bar", new FooBar(null));
+        Foo foo = new Foo("foo", bar);
+
+        Set<ConstraintViolation<Foo>> validate = validator.validate(foo);
+        assertThat(validate).isNotEmpty();
+    }
+}
\ No newline at end of file