diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d70d5a9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,43 @@
+*#
+*.iml
+*.ipr
+*.iws
+*.jar
+*.sw?
+*~
+.#*
+.*.md.html
+.DS_Store
+.attach_pid*
+.classpath
+.factorypath
+.gradle
+.metadata
+.project
+.recommenders
+.settings
+.springBeans
+.vscode
+/code
+MANIFEST.MF
+_site/
+activemq-data
+bin
+build
+!/**/src/**/bin
+!/**/src/**/build
+build.log
+dependency-reduced-pom.xml
+dump.rdb
+interpolated*.xml
+lib/
+manifest.yml
+out
+overridedb.*
+target
+.flattened-pom.xml
+secrets.yml
+.gradletasknamecache
+.sts4-cache
+
+.idea
\ No newline at end of file
diff --git a/HELP.md b/HELP.md
new file mode 100644
index 0000000..af429c6
--- /dev/null
+++ b/HELP.md
@@ -0,0 +1,22 @@
+# Getting Started
+
+### Reference Documentation
+For further reference, please consider the following sections:
+
+* [Official Gradle documentation](https://docs.gradle.org)
+* [Spring Boot Gradle Plugin Reference Guide](https://docs.spring.io/spring-boot/3.4.3/gradle-plugin)
+* [Create an OCI image](https://docs.spring.io/spring-boot/3.4.3/gradle-plugin/packaging-oci-image.html)
+* [Spring Web](https://docs.spring.io/spring-boot/3.4.3/reference/web/servlet.html)
+
+### Guides
+The following guides illustrate how to use some features concretely:
+
+* [Building a RESTful Web Service](https://spring.io/guides/gs/rest-service/)
+* [Serving Web Content with Spring MVC](https://spring.io/guides/gs/serving-web-content/)
+* [Building REST services with Spring](https://spring.io/guides/tutorials/rest/)
+
+### Additional Links
+These additional references should also help you:
+
+* [Gradle Build Scans – insights for your project's build](https://scans.gradle.com#gradle)
+
diff --git a/README.md b/README.md
index ebeffaf..bc0452b 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,290 @@
-# spring-tutorial-21st
-CEOS back-end 21st spring tutorial project
+# CEOS Backend Study Week 1
+
+## 1. Spring Tutorial
+
+### Initial Setting
+
+- Project : Gradle - Groovy
+- Language : Java 17
+- Spring Boot : 3.2.9
+- Project Metadata
+    - Group : com.ceos21
+    - Artifact : springboot
+    - Packaging : Jar
+    - Java version : 17
+- Dependencies
+    - Spring Web
+
+### H2 Database
+
+- reference: [reference doc](https://phantom.tistory.com/59)
+
+- 실행: `h2/bin/h2.sh` → `./h2.sh`
+- 접속: `8082`앞부분을 `localhost`로 바꾸기
+- 최초 서버 실행
+    - JDBC URL : `jdbc:h2:~/ceos21`
+    - User Name: `sa`
+- 이후 서버 실행
+    - JDBC URL : `jdbc:h2:tcp://localhost/~/ceos21` → TCP 접속
+    - User Name: `sa`
+- Dependencies
+
+    ```jsx
+    	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    	compileOnly 'org.projectlombok:lombok'
+    	annotationProcessor 'org.projectlombok:lombok'
+    	runtimeOnly 'com.h2database:h2'
+    ```
+
+- Application.yml
+
+    ```jsx
+    spring:
+      datasource:
+        url: jdbc:h2:tcp://localhost/~/ceos21
+        username: sa
+        password:
+        driver-class-name: org.h2.Driver
+    
+      jpa:
+        hibernate:
+          ddl-auto: create
+        properties:
+          hibernate:
+            format_sql: true
+    
+    logging:
+      level:
+        org.hibernate.SQL: debug
+    ```
+
+
+### 테스트 관련
+
+- Dependencies
+
+    ```jsx
+    testImplementation('org.springframework.boot:spring-boot-starter-test')
+    ```
+
+- `MockMvc`
+    - reference: [reference doc](https://terasolunaorg.github.io/guideline/5.4.1.RELEASE/en/UnitTest/ImplementsOfUnitTest/UsageOfLibraryForTest.html#mockmvc)
+
+      1. test method에서 HTTP 기반 요청 보냄
+      2. **MockMvc가 TestDispatcherServlet에 가상의 요청 전송 → mock request**
+      - Dispatcher servlet은 request를 받아서 맞는 controller를 찾는 역할
+      3. TestDispatcherServelet이 Controller에 매칭되는 메소드를 불러서 요청 처리
+      4. test method는 mockMvc로부터 결과를 받고 verify를 함
+          ![MockMvc](./readme-src/mockmvc.png)
+
+  - `@SpringBootTest` + `@AutoConfigureMockMvc` → `webAppContextSettup`기반
+  - MockMvc 옵션
+    1. `webAppContextSetup`: **Spring의 전체 애플리케이션 컨텍스트(ApplicationContext)를 로드**하여 테스트하는 방식
+    2. `standaloneSetup`: **테스트 대상이 되는 Controller만 로드**하여 실행 (mock객체를 직접 주입해야함)
+      ```java
+      import org.junit.jupiter.api.DisplayName;
+      import org.junit.jupiter.api.Test;
+      import org.springframework.beans.factory.annotation.Autowired;
+      import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+      import org.springframework.boot.test.context.SpringBootTest;
+      import org.springframework.http.MediaType;
+      import org.springframework.test.web.servlet.MockMvc;
+      import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+      import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+      import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+      import static org.hamcrest.core.IsEqual.equalTo;
+    
+      @SpringBootTest
+      @AutoConfigureMockMvc
+      public class HelloControllerTest {
+          @Autowired
+          private MockMvc mvc;
+    
+          @DisplayName("DisplayName: 테스트 이름 설정")
+          @Test
+          public void getHello() throws Exception {
+              mvc.perform(MockMvcRequestBuilders.get("/").accept(MediaType.APPLICATION_JSON))
+                      .andExpect(status().isOk())
+                      .andExpect(content().string(equalTo("Greetings from Spring Boot!")));
+          }
+      }
+    
+      ```
+
+
+## 2. Spring이 지원하는 기술(IoC/DI, AOP, PSA) 조사
+
+### Spring IoC Container
+
+- **객체의 생성과 관리를 개발자가 아닌 Spring 프레임워크가 담당**하는 개념 (Inversion of Control)
+- IoC 컨테이너 작동 방식
+    1. 객체를 class로 정의
+    2. 객체들 간 연관성 지정: Spring Config file / Annotation(`@Component` , `@Configuration`, `@Autowired`, `@Bean`)을 통해 객체들이 어떻게 연결될지(의존성 주입) 지정
+    3. IoC 컨테이너가 이 정보를 바탕으로 객체들을 생성하고 필요한 곳에 주입
+
+### Spring DI(Dependency Injection)
+
+- 객체가 생성자 인수, 팩토리 메서드에서 생성되거나 반환된 후에, 객체 인스턴스에 설정된 속성을 통해서만 종속성을 정의하는 프로세스 → **의존성을 외부에서 주입받음**
+- 의존성 주입 방식
+    1. 생성자 주입 (Constructor Injection) 🤩 → 객체 불변성(immutability) 보장
+       - `@RequiredArgsConstructor` 등을 하면 Lombok이 생성자를 자동으로 생성해줌
+    2. Setter 주입 (Setter Injection) → 런타임에 의존성 주입
+    3. 필드 주입 (Field Injection) → 런타임에 의존성 주입
+
+### AOP(Aspect Oriented Programming)
+
+- **반복 사용되는 로직들을 모듈화 하여 필요할때 호출해서 사용하는 방법**
+
+  ![AOP](./readme-src/aop.png)
+
+- Proxy 기반 AOP
+    - `CGLib`을 이용해서 Proxy 객체를 만들어냄
+    - 프록시 객체가 메서드 실행 전후에 부가 기능(횡단 관심사)을 추가 →  이후 실제 객체를 호출
+
+
+### PSA(Portable Service Abstraction)
+
+- 환경의 변화와 관계없이 일관된 방식의 기술로의 접근 환경을 제공하는 추상화 구조
+
+![PSA](./readme-src/psa.png)
+
+- `DBClient`에서 어떤 `Connector` 객체에 접근하려해도 모두 같은 추상화된 interface를 거치고 `getConnection()`으로 접근 가능함
+
+## 3. Spring Bean이란? Bean의 life cyle?
+
+### Spring Bean
+
+- **Spring 컨테이너가 관리하는 자바의 객체**
+- Spring은 빈(Bean)을 통해 객체를 인스턴스화한 후, 객체 간의 의존 관계를 관리
+- 클래스에 `@Component` 어노테이션 추가 → Spring이 자동으로 해당 클래스를 스캔 & Bean으로 등록
+- `@Component` → `@Autowired` : **묵시적 빈 정의**
+    - 클래스에 어노테이션을 추가 → Autowired로 다른 클래스에서 해당 Bean을 끌어옴
+- `@Configuration` → `@Bean` : **명시적 빈 정의**
+    - Spring 설정 파일에 Configuration 어노테이션을 추가 → Bean 어노테이션을 붙여 명시적으로 빈을 지정
+
+### Bean Life Cycle
+
+- Spring이 객체(Bean)의 생성과 소멸 및 생명주기를 관리
+1. 스프링 IoC 컨테이너 생성 → `ApplicationContext` 로드
+2. 스프링 빈 생성 → `@Component`, `@Bean`
+3. 의존관계 주입 → `@Autowired`
+4. 초기화 콜백 메소드 호출 → `@PostConstruct` (빈 생성 후 바로 실행됨)
+5. 사용
+6. 소멸 전 콜백 메소드 호출 → `@PreDestroy` (컨테이너 종료 직전 실행됨)
+7. 스프링 종료
+
+## 4. Spring Annotation 분석
+
+### 어노테이션의 활용
+
+- Spring에서는 어노테이션을 활용하여 **의존성 주입(DI), AOP, 설정 관리** 등을 수행
+
+### 어노테이션을 통한 Bean 등록
+
+- Spring에서 **어노테이션을 통해 빈을 자동 등록(Bean Registration)** 할 수 있음
+1. Spring이 `@ComponentScan`을 실행하여 특정 패키지를 스캔
+2. 해당 패키지 내에서 `@Component`, `@Service`, `@Repository`, `@Controller`가 붙은 클래스를 찾음
+3. 찾은 클래스를 Spring 컨테이너(ApplicationContext)에 등록 → Bean으로 관리
+4. 의존성 주입(DI)을 통해 필요한 곳에 Bean을 자동 연결 (`@Autowired` 어노테이션 사용)
+
+## 5. 단위 테스트 vs 통합 테스트
+
+### 단위 테스트(Unit Test)
+
+- 개별 모듈 또는 클래스의 기능을 검증하는 것에 초점을 맞춘 테스트
+- 도구: JUnit 5, Mockito, AssertJ, Spring Boot Test
+
+### 통합 테스트(Integration Test)
+
+- 모듈이 서로 통합되어 상호작용할 때 방생할 수 있는 문제를 찾아내고 해결하는 데 중점을 둔 테스트
+- 도구: Spring Boot Test, TestContainers
+
+---
+### Component Scan의 플로우
+1. `@SpringBootApplication` → `ComponentScan` 어노테이션
+  - `@Component`, `@Service`, `@Repository`, `@Controller`가 붙은 객체 등록
+  - ![springboot](./readme-src/springboot.png)
+2. `@Service` & `@Controller`
+  - `@Service` → `@Component`
+  - `@RestController` → `@Controller` → `@Component`
+  - ![Service & Controller](./readme-src/servicencontroller.png)
+3. `@Repository`로 등록하지 않았지만 Repository가 Jpa Repository를 상속받는다면 Component로 등록됨
+  - SpringBoot에서 `@EnableJpaRepositories`가 설정되어 있음 → `@Import(JpaRepositoriesRegistrar.class)`에서 JpaRepositoriesRegistrar가 JpaRepository를 상속받는 모든 interface를 빈으로 등록
+  - ![repository](./readme-src/repository.png)
+
+### Custom Annotation과 AOP를 적용한 로깅
+- 사용자 정의 Annotation
+
+    ```jsx
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target(ElementType.TYPE)
+    public @interface SampleAnnotation {}
+    ```
+
+  1. `@interface` 선언
+  2. `@Retention` (어노테이션을 어느 기간이 유지할건지), `@Target` (어떤 것에 적용할건지) 설정
+    - 옵션 reference: [options](https://velog.io/@juhyeon1114/%EC%BB%A4%EC%8A%A4%ED%85%80-Annotation-%EB%A7%8C%EB%93%A4%EA%B8%B0)
+  3. `@Aspect` 어노테이션이 붙은 AOP 클래스 생성해서 어노테이션 동작 로직 작성
+  4. 커스텀 어노테이션을 적용하고 싶은 곳에 어노테이션을 붙이고 사용
+
+- AOP Dependencies
+
+    ```jsx
+    implementation 'org.springframework.boot:spring-boot-starter-aop'
+    ```
+
+- reference: [reference doc](https://velog.io/@jjeongdong/Spring-AOP%EB%A5%BC-%ED%99%9C%EC%9A%A9%ED%95%9C-Logging-%EA%B5%AC%ED%98%84)
+- 구현 - `@LogRecord` 인터페이스 정의
+
+    ```jsx
+    @Target(ElementType.METHOD)
+    @Retention(RetentionPolicy.RUNTIME)
+    public @interface LogRecord {
+    }
+    ```
+
+- 구현 - 어노테이션 동작 로직 정의
+
+    ```jsx
+    @Aspect
+    @Component
+    @Slf4j
+    public class LogAspect {
+    
+        @Around("@annotation(com.ceos21.springboot.annotation.logRecord.LogRecord)")
+        public Object logRecord(ProceedingJoinPoint joinPoint) throws Throwable {
+            MethodSignature signature = (MethodSignature) joinPoint.getSignature();
+            Method method = signature.getMethod();
+            log.info("[START] ======= method name = {} =======", method.getName());
+    
+            long startTime = System.currentTimeMillis();
+            Object result = joinPoint.proceed();
+            long executionTime = System.currentTimeMillis() - startTime;
+    
+            log.info("[END] ======= method executionTime = {} =======", executionTime);
+    
+            return result;
+        }
+    }
+    
+    ```
+
+- 구현 - 원하는 곳에 어노테이션 적용
+
+    ```jsx
+    @Service
+    @RequiredArgsConstructor
+    @Slf4j
+    public class TestService {
+        private final TestRepository testRepository;
+    
+        /* Read All */
+        @Transactional(readOnly = true)
+        @LogRecord
+        public List<Test> findAllTests() {
+            return testRepository.findAll();
+        }
+    }
+    ```
+- 실행 결과
+  - ![result](./readme-src/logging.png)
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..439563b
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,36 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.4.3'
+	id 'io.spring.dependency-management' version '1.1.7'
+}
+
+group = 'com.ceos21'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(17)
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+	testImplementation('org.springframework.boot:spring-boot-starter-test')
+
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	compileOnly 'org.projectlombok:lombok'
+	annotationProcessor 'org.projectlombok:lombok'
+	runtimeOnly 'com.h2database:h2'
+
+	implementation 'org.springframework.boot:spring-boot-starter-aop'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..37f853b
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..faf9300
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original 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.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..9d21a21
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/readme-src/aop.png b/readme-src/aop.png
new file mode 100644
index 0000000..48c28ef
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diff --git a/readme-src/logging.png b/readme-src/logging.png
new file mode 100644
index 0000000..700114c
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diff --git a/readme-src/mockmvc.png b/readme-src/mockmvc.png
new file mode 100644
index 0000000..f98191e
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diff --git a/readme-src/psa.png b/readme-src/psa.png
new file mode 100644
index 0000000..a56938b
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diff --git a/readme-src/repository.png b/readme-src/repository.png
new file mode 100644
index 0000000..aa1d634
Binary files /dev/null and b/readme-src/repository.png differ
diff --git a/readme-src/servicencontroller.png b/readme-src/servicencontroller.png
new file mode 100644
index 0000000..9b80936
Binary files /dev/null and b/readme-src/servicencontroller.png differ
diff --git a/readme-src/springboot.png b/readme-src/springboot.png
new file mode 100644
index 0000000..12f74a2
Binary files /dev/null and b/readme-src/springboot.png differ
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..9c02403
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'springboot'
diff --git a/src/main/java/com/ceos21/springboot/SpringbootApplication.java b/src/main/java/com/ceos21/springboot/SpringbootApplication.java
new file mode 100644
index 0000000..5d75388
--- /dev/null
+++ b/src/main/java/com/ceos21/springboot/SpringbootApplication.java
@@ -0,0 +1,37 @@
+package com.ceos21.springboot;
+
+import com.ceos21.springboot.annotation.logRecord.LogRecord;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.annotation.RequestParam;
+
+import java.util.Arrays;
+
+@SpringBootApplication
+public class SpringbootApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SpringbootApplication.class, args);
+	}
+
+//	@Bean
+//	public CommandLineRunner CommandLineRunner(ApplicationContext ctx) {
+//		return args -> {
+//			System.out.println("Let's inspect the beans provided by Spring Boot:");
+//
+////			 SpringBoot에서 제공되는 Bean 확인
+//			String[] beanNames = ctx.getBeanDefinitionNames();
+//			Arrays.sort(beanNames);
+//			for (String beanName : beanNames) {
+//				System.out.println(beanName);
+//			}
+//		};
+//	}
+
+}
diff --git a/src/main/java/com/ceos21/springboot/annotation/logRecord/LogAspect.java b/src/main/java/com/ceos21/springboot/annotation/logRecord/LogAspect.java
new file mode 100644
index 0000000..020ca38
--- /dev/null
+++ b/src/main/java/com/ceos21/springboot/annotation/logRecord/LogAspect.java
@@ -0,0 +1,31 @@
+package com.ceos21.springboot.annotation.logRecord;
+
+import lombok.extern.slf4j.Slf4j;
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.aspectj.lang.reflect.MethodSignature;
+import org.springframework.stereotype.Component;
+
+import java.lang.reflect.Method;
+
+@Aspect
+@Component
+@Slf4j
+public class LogAspect {
+
+    @Around("@annotation(com.ceos21.springboot.annotation.logRecord.LogRecord)")
+    public Object logRecord(ProceedingJoinPoint joinPoint) throws Throwable {
+        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
+        Method method = signature.getMethod();
+        log.info("[START] ======= method name = {} =======", method.getName());
+
+        long startTime = System.currentTimeMillis();
+        Object result = joinPoint.proceed();
+        long executionTime = System.currentTimeMillis() - startTime;
+
+        log.info("[END] ======= method executionTime = {} =======", executionTime);
+
+        return result;
+    }
+}
diff --git a/src/main/java/com/ceos21/springboot/annotation/logRecord/LogRecord.java b/src/main/java/com/ceos21/springboot/annotation/logRecord/LogRecord.java
new file mode 100644
index 0000000..cdc982c
--- /dev/null
+++ b/src/main/java/com/ceos21/springboot/annotation/logRecord/LogRecord.java
@@ -0,0 +1,11 @@
+package com.ceos21.springboot.annotation.logRecord;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface LogRecord {
+}
diff --git a/src/main/java/com/ceos21/springboot/controller/HelloController.java b/src/main/java/com/ceos21/springboot/controller/HelloController.java
new file mode 100644
index 0000000..220378c
--- /dev/null
+++ b/src/main/java/com/ceos21/springboot/controller/HelloController.java
@@ -0,0 +1,12 @@
+package com.ceos21.springboot.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HelloController {
+    @GetMapping("/")
+    public String index() {
+        return "Greetings from Spring Boot!";
+    }
+}
diff --git a/src/main/java/com/ceos21/springboot/controller/TestController.java b/src/main/java/com/ceos21/springboot/controller/TestController.java
new file mode 100644
index 0000000..24201e0
--- /dev/null
+++ b/src/main/java/com/ceos21/springboot/controller/TestController.java
@@ -0,0 +1,23 @@
+package com.ceos21.springboot.controller;
+
+import com.ceos21.springboot.entity.Test;
+import com.ceos21.springboot.service.TestService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/tests")
+public class TestController {
+    private final TestService testService;
+
+    @GetMapping
+    public List<Test> findAllTests() {
+        return testService.findAllTests();
+    }
+}
diff --git a/src/main/java/com/ceos21/springboot/entity/Test.java b/src/main/java/com/ceos21/springboot/entity/Test.java
new file mode 100644
index 0000000..a70417a
--- /dev/null
+++ b/src/main/java/com/ceos21/springboot/entity/Test.java
@@ -0,0 +1,13 @@
+package com.ceos21.springboot.entity;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import lombok.Data;
+
+@Data
+@Entity
+public class Test {
+    @Id
+    private Long id;
+    private String name;
+}
diff --git a/src/main/java/com/ceos21/springboot/repository/TestRepository.java b/src/main/java/com/ceos21/springboot/repository/TestRepository.java
new file mode 100644
index 0000000..5117dc3
--- /dev/null
+++ b/src/main/java/com/ceos21/springboot/repository/TestRepository.java
@@ -0,0 +1,7 @@
+package com.ceos21.springboot.repository;
+
+import com.ceos21.springboot.entity.Test;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface TestRepository extends JpaRepository<Test, Long> {
+}
diff --git a/src/main/java/com/ceos21/springboot/service/TestService.java b/src/main/java/com/ceos21/springboot/service/TestService.java
new file mode 100644
index 0000000..e438d93
--- /dev/null
+++ b/src/main/java/com/ceos21/springboot/service/TestService.java
@@ -0,0 +1,25 @@
+package com.ceos21.springboot.service;
+
+import com.ceos21.springboot.annotation.logRecord.LogRecord;
+import com.ceos21.springboot.repository.TestRepository;
+import com.ceos21.springboot.entity.Test;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+public class TestService {
+    private final TestRepository testRepository;
+
+    /* Read All */
+    @Transactional(readOnly = true)
+    @LogRecord
+    public List<Test> findAllTests() {
+        return testRepository.findAll();
+    }
+}
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
new file mode 100644
index 0000000..e02c51d
--- /dev/null
+++ b/src/main/resources/application.yml
@@ -0,0 +1,17 @@
+spring:
+  datasource:
+    url: jdbc:h2:tcp://localhost/~/ceos21
+    username: sa
+    password:
+    driver-class-name: org.h2.Driver
+
+  jpa:
+    hibernate:
+      ddl-auto: create
+    properties:
+      hibernate:
+        format_sql: true
+
+logging:
+  level:
+    org.hibernate.SQL: debug
\ No newline at end of file
diff --git a/src/test/java/com/ceos21/springboot/SpringbootApplicationTests.java b/src/test/java/com/ceos21/springboot/SpringbootApplicationTests.java
new file mode 100644
index 0000000..b0bd6c9
--- /dev/null
+++ b/src/test/java/com/ceos21/springboot/SpringbootApplicationTests.java
@@ -0,0 +1,13 @@
+package com.ceos21.springboot;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class SpringbootApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}
diff --git a/src/test/java/com/ceos21/springboot/controllerTest/HelloControllerTest.java b/src/test/java/com/ceos21/springboot/controllerTest/HelloControllerTest.java
new file mode 100644
index 0000000..0fe564b
--- /dev/null
+++ b/src/test/java/com/ceos21/springboot/controllerTest/HelloControllerTest.java
@@ -0,0 +1,29 @@
+package com.ceos21.springboot.controllerTest;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+
+import static org.hamcrest.core.IsEqual.equalTo;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+public class HelloControllerTest {
+    @Autowired
+    private MockMvc mvc;
+
+    @DisplayName("DisplayName: 테스트 이름 설정")
+    @Test
+    public void getHello() throws Exception {
+        mvc.perform(MockMvcRequestBuilders.get("/").accept(MediaType.APPLICATION_JSON))
+                .andExpect(status().isOk())
+                .andExpect(content().string(equalTo("Greetings from Spring Boot!")));
+    }
+}