From b0319848aa45314654d53be42f609456ed077473 Mon Sep 17 00:00:00 2001
From: mirupio <162397816+mirupio@users.noreply.github.com>
Date: Fri, 14 Mar 2025 16:01:20 +0900
Subject: [PATCH 1/2] =?UTF-8?q?Update=20README.md=20-=201=EC=A3=BC?=
 =?UTF-8?q?=EC=B0=A8?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md | 154 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)

diff --git a/README.md b/README.md
index ebeffaf..19bd5a3 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,156 @@
 # spring-tutorial-21st
 CEOS back-end 21st spring tutorial project
+
+# 1주차 미션
+## Spring
+: java 기반 백엔드 프레임워크
+
+## Spring이 지원하는 기술들
+### 1. IoC(=Inversion of Control) 제어의 역전
+#### 개념
+  - 개발자가 객체를 직접 **생성, 관리**하지 않고, **Spring**이 함
+  이를 위해, **'Spring Container'** 존재
+
+#### 존재 이유
+  - 기존 : **개발자**가 직접 객체를 생성하고, 관리하고, 의존성을 해결 
+  - IoC 적용 후 : 이 일들을 **Spring**이 맡아주기 때문에 **코드가 간결**해지고, **유지보수가 쉬워짐**
+
+#### 구현 방식
+  - **DI(=Dependency Injection) 의존성 주입**
+
+#### 장점
+
+1. **결합도 낮춤**
+	- 객체 간의 강한 **의존성 제거** -> 코드의 **유연성, 재사용성** 높임
+    ex) new를 사용하지 않고, 인터페이스 기반으로 의존성을 주입
+    
+2. **유지 보수 용이**
+	- 객체를 변경할 때 코드 전체를 수정할 필요 없이 설정 파일(applicationContext.xml)이나 어노테이션(@Autowired, @Inject)을 수정하면 됨
+    
+2. **객체 생성 및 생명 주기 관리 자동화**
+	- Spring이 객체를 생성하고 소멸시켜줘서, **개발자는 비즈니스 로직에 집중**할 수 있음
+    
+3. **테스트 용이성**
+	- 실제 객체 대신 가짜(Mock) 객체 등을 활용한 **단위테스트 작성**이 쉬워짐 
+
+
+### 2. AOP(=Aspect-Oriented Programming) 관점 지향 프로그래밍
+#### 개념
+- **핵심 로직**과 **부가 기능**을 **분리**하는 프로그래밍 방식
+
+#### 존재 이유
+- 여러 클래스에서 반복적으로 등장하는 **공통 기능을 모듈화**해서 여러 클래스에서 쉽게 **재사용**
+
+#### 장점
+1. **코드 중복 제거**
+
+2. **유지보수성 향상**
+- 공통 기능이 한 곳에 모여 있어 수정이 필요할 때 여러 곳을 수정할 필요 없음
+
+3. **핵심 로직과 보조 기능을 분리**
+- 핵심 로직을 방해하지 않으면서 부가적인 기능을 쉽게 추가 가능
+ex) 로깅, 보안, 트랜잭션 처리
+
+### 3. PSA(=Portable Service Abstraction) 휴대 가능한 서비스 추상화
+#### 개념
+- 다양한 기술 스택을 **추상화**하여 일관된 방식(**통합된 인터페이스**)으로 사용할 수 있도록 제공
+
+#### 존재 이유
+- 여러 기술의 **차이**를 개발자가 직접 처리하지 않도록 하기 위해
+
+#### 장점
+1. **기술 스택 변경 용이**
+	ex) JDBC에서 JPA로 전환해도 코드를 크게 수정하지 않아도 됨
+    
+2. **일관된 개발 방식 제공**
+	- Spring이 제공하는 공통 API를 사용
+    
+3. **기술 종속성 제거**
+	- 특정 기술에 의존하지 않고 개발
+    	ex) JDBC, Hibernate, JPA, JMS 등
+
+## Spring Bean
+#### 개념
+- **Spring Container**에 의해 관리되는 객체
+
+#### 특징
+1. **Spring Container가 직접 관리**
+	- **Application** 또는 **BeanFactory**가 생성, 소멸 관리
+
+2. **Singleton 기본 적용**
+	- Spring Container 내에서 하나의 Bean은 하나만 생성됨
+    - 기본 설정 : @Scope("singleton"), 필요하면 변경 가능 : @Scope("prototype")
+
+3. **Lazy Initialization 가능**
+	= 필요할 때만 생성됨
+    - 기본 설정 : Container가 로드될 때 Bean 미리 생성, 필요하면 변경 가능 : @Lazy -> 생성 미룸
+
+#### 존재 이유
+- 의존성 주입을 위해
+
+#### 구현 방식
+1. **어노테이션 기반**
+	= @Componet 계열 어노테이션 사용
+	- @Component, @Service, @Repository, @Controller 등 사용 -> 자동 Bean 등록
+
+2. **Java Config**
+	= @Bean 사용
+	- @Configuration 클래스 내부에서 @Bean 메서드 사용 -> 직접 Bean 등록
+
+### Spring Bean의 라이프사이클
+#### 1. 객체 생성
+- @Component, @Bean 사용
+	-> Spring이 Bean을 자동 생성
+
+#### 2. 의존성 주입
+- @Autowired, @Inject, @Resource 사용
+	-> 의존성 자동 주입
+
+#### 3. 초기화
+- @PostConstruct 또는 init-method 속성 사용
+- InitializingBean 인터페이스 구현 -> afterPropertiesSet() 메서드 호출
+	-> Bean이 생성된 후 실행할 초기화 로직을 수행
+
+#### 4. 사용
+-> Bean 사용하면서 애플리케이션이 로직 수행
+
+#### 5. 소멸
+- @PreDestroy 또는 destroy-method 속성 사용
+- DisposableBean 인터페이스 구현 -> destroy() 메서드 호출
+	-> 애플리케이션 종료 시, Bean이 소멸되기 전 정리할 작업 수행
+
+## Spring annotation
+#### 개념
+- Java에서 메타데이터를 제공하는 특수한 형태의 마커
+
+#### 구현 방식
+- **컴포넌트 스캔** : @Controller, @Service, @Repository (는 @Component 포함) -> spring bean으로 자동 등록
+  - Spring container라는 '통'에 @Controller붙은 것들을 '컨트롤러 객체'로 생성해서 넣어둠
+  - Spring container라는 '통'에 @Service붙은 것들을 '서비스 객체'로 생성해서 넣어둠
+  - Spring container라는 '통'에 @Repository붙은 것들을 '리포지토리 객체'로 생성해서 넣어둠 
+- **자동 의존관계 설정** : 생성자에 @Autowired 붙어 있으면 spring container에 있는 객체와 연결시켜줌
+
+
+## 단위 테스트와 통합 테스트
+### 단위 테스트 Unit Test
+#### 개념
+- 애플리케이션의 **개별 모듈**(클래스, 메서드 단위)만을 테스트
+- 다른 모듈과의 의존성을 제거(Mocking) 하여 독립적으로 테스트
+
+#### 존재 이유
+- **빠르고 독립적**이므로 **주요 기능 검증**하는 데 유용
+
+### 통합 테스트 Integration Test
+#### 개념
+- **여러 모듈**(서비스, 컨트롤러 등)이 실제로 연동되는지 테스트
+- 데이터베이스, API, 파일 시스템 등과의 실제 연동 확인
+
+#### 존재 이유
+- **실제 환경과 유사**하게 동작을 검증하는 데 필요
+
+
+## 느낀점
+용어 자체는 익숙해도 정확히는 알지 못했던 개념들을 꼼꼼하게 정리할 수 있어서 좋았다. 이전 프로젝트에서 스프링 기술들을 한 번 경험한 후에 개념을 정리하니까 좀 더 기억에 잘 남고 재미있었다. 기술을 알고 쓰는 것과 모르는데 무턱대고 쓰는 것은 정말 차이가 클 것이기 때문에, 이번에 이렇게 이해한 개념들을 프로젝트에서 적용해볼 생각에 조금 설렌다. 또 '존재 이유' 위주로 공부하니까 이해가 더 잘되는 것 같아서 앞으로도 이런식으로 공부해야겠다.
+
+
+

From abad5f2b0eee38eb8a33d46d0987587f9f29ea22 Mon Sep 17 00:00:00 2001
From: mirupio <162397816+mirupio@users.noreply.github.com>
Date: Sun, 16 Mar 2025 13:19:10 +0900
Subject: [PATCH 2/2] week1 hw

---
 .gitattributes                                |   3 +
 .gitignore                                    |  43 +++
 HELP.md                                       |  27 ++
 build.gradle                                  |  33 +++
 gradle/wrapper/gradle-wrapper.properties      |   7 +
 gradlew                                       | 252 ++++++++++++++++++
 gradlew.bat                                   |  94 +++++++
 settings.gradle                               |   1 +
 .../com/ceos21/spring_boot/Application.java   |  34 +++
 .../controller/HelloController.java           |  14 +
 .../controller/TestController.java            |  23 ++
 .../com/ceos21/spring_boot/entity/Test.java   |  14 +
 .../repository/TestRepository.java            |   6 +
 .../spring_boot/service/TestService.java      |  22 ++
 src/main/resources/application.yml            |  17 ++
 .../ceos21/spring_boot/ApplicationTests.java  |  13 +
 .../controllerTest/HelloControllerTest.java   |  31 +++
 17 files changed, 634 insertions(+)
 create mode 100644 .gitattributes
 create mode 100644 .gitignore
 create mode 100644 HELP.md
 create mode 100644 build.gradle
 create mode 100644 gradle/wrapper/gradle-wrapper.properties
 create mode 100644 gradlew
 create mode 100644 gradlew.bat
 create mode 100644 settings.gradle
 create mode 100644 src/main/java/com/ceos21/spring_boot/Application.java
 create mode 100644 src/main/java/com/ceos21/spring_boot/controller/HelloController.java
 create mode 100644 src/main/java/com/ceos21/spring_boot/controller/TestController.java
 create mode 100644 src/main/java/com/ceos21/spring_boot/entity/Test.java
 create mode 100644 src/main/java/com/ceos21/spring_boot/repository/TestRepository.java
 create mode 100644 src/main/java/com/ceos21/spring_boot/service/TestService.java
 create mode 100644 src/main/resources/application.yml
 create mode 100644 src/test/java/com/ceos21/spring_boot/ApplicationTests.java
 create mode 100644 src/test/java/com/ceos21/spring_boot/controllerTest/HelloControllerTest.java

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..8af972c
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary
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..015785b
--- /dev/null
+++ b/HELP.md
@@ -0,0 +1,27 @@
+# Read Me First
+The following was discovered as part of building this project:
+
+* The original package name 'com.ceos21.spring-boot' is invalid and this project uses 'com.ceos21.spring_boot' instead.
+
+# 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/build.gradle b/build.gradle
new file mode 100644
index 0000000..2069efb
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,33 @@
+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(21)
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	compileOnly 'org.projectlombok:lombok'
+	annotationProcessor 'org.projectlombok:lombok'
+	runtimeOnly 'com.h2database:h2'
+
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..e18bc25
--- /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-8.12.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100644
index 0000000..f5feea6
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,252 @@
+#!/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 "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$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, 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/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..19b5204
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'spring-boot'
diff --git a/src/main/java/com/ceos21/spring_boot/Application.java b/src/main/java/com/ceos21/spring_boot/Application.java
new file mode 100644
index 0000000..deae1f6
--- /dev/null
+++ b/src/main/java/com/ceos21/spring_boot/Application.java
@@ -0,0 +1,34 @@
+package com.ceos21.spring_boot;
+
+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 java.util.Arrays;
+
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+	@Bean
+	public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
+		return args -> {
+
+			System.out.println("Let's inspect the beans provided by Spring Boot:");
+
+			// Spring Boot 에서 제공되는 Bean 확인
+			String[] beanNames = ctx.getBeanDefinitionNames();
+			Arrays.sort(beanNames);
+			for (String beanName : beanNames) {
+				System.out.println(beanName);
+			}
+
+		};
+	}
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/ceos21/spring_boot/controller/HelloController.java b/src/main/java/com/ceos21/spring_boot/controller/HelloController.java
new file mode 100644
index 0000000..c06dbf8
--- /dev/null
+++ b/src/main/java/com/ceos21/spring_boot/controller/HelloController.java
@@ -0,0 +1,14 @@
+package com.ceos21.spring_boot.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!";
+    }
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/ceos21/spring_boot/controller/TestController.java b/src/main/java/com/ceos21/spring_boot/controller/TestController.java
new file mode 100644
index 0000000..1498f3d
--- /dev/null
+++ b/src/main/java/com/ceos21/spring_boot/controller/TestController.java
@@ -0,0 +1,23 @@
+package com.ceos21.spring_boot.controller;
+
+import com.ceos21.spring_boot.entity.Test;
+import com.ceos21.spring_boot.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.RestController;
+
+import java.util.List;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping(value = "/tests")
+public class TestController {
+
+    private final TestService testService;
+
+    @GetMapping
+    public List<Test> findAllTests() {
+        return testService.findAllTests();
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/ceos21/spring_boot/entity/Test.java b/src/main/java/com/ceos21/spring_boot/entity/Test.java
new file mode 100644
index 0000000..9f80f89
--- /dev/null
+++ b/src/main/java/com/ceos21/spring_boot/entity/Test.java
@@ -0,0 +1,14 @@
+package com.ceos21.spring_boot.entity;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import lombok.Data;
+
+@Data
+@Entity
+public class Test {
+
+    @Id
+    private Long id;
+    private String name;
+}
\ No newline at end of file
diff --git a/src/main/java/com/ceos21/spring_boot/repository/TestRepository.java b/src/main/java/com/ceos21/spring_boot/repository/TestRepository.java
new file mode 100644
index 0000000..0e772de
--- /dev/null
+++ b/src/main/java/com/ceos21/spring_boot/repository/TestRepository.java
@@ -0,0 +1,6 @@
+package com.ceos21.spring_boot.repository;
+
+import com.ceos21.spring_boot.entity.Test;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface TestRepository extends JpaRepository<Test, Long> {}
\ No newline at end of file
diff --git a/src/main/java/com/ceos21/spring_boot/service/TestService.java b/src/main/java/com/ceos21/spring_boot/service/TestService.java
new file mode 100644
index 0000000..a7f1821
--- /dev/null
+++ b/src/main/java/com/ceos21/spring_boot/service/TestService.java
@@ -0,0 +1,22 @@
+package com.ceos21.spring_boot.service;
+
+import com.ceos21.spring_boot.entity.Test;
+import com.ceos21.spring_boot.repository.TestRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class TestService {
+
+    private final TestRepository testRepository;
+
+    /* Read All*/
+    @Transactional(readOnly = true)
+    public List<Test> findAllTests() {
+        return testRepository.findAll();
+    }
+}
\ No newline at end of file
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/spring_boot/ApplicationTests.java b/src/test/java/com/ceos21/spring_boot/ApplicationTests.java
new file mode 100644
index 0000000..cfbe7af
--- /dev/null
+++ b/src/test/java/com/ceos21/spring_boot/ApplicationTests.java
@@ -0,0 +1,13 @@
+package com.ceos21.spring_boot;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class ApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}
diff --git a/src/test/java/com/ceos21/spring_boot/controllerTest/HelloControllerTest.java b/src/test/java/com/ceos21/spring_boot/controllerTest/HelloControllerTest.java
new file mode 100644
index 0000000..395d804
--- /dev/null
+++ b/src/test/java/com/ceos21/spring_boot/controllerTest/HelloControllerTest.java
@@ -0,0 +1,31 @@
+package com.ceos21.spring_boot.controllerTest;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+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 org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+public class HelloControllerTest {
+
+    @Autowired
+    private MockMvc mvc;
+
+    @DisplayName("DisplayName : 테스트 이름을 설정할 수 있습니다")
+    @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!")));
+    }
+}
\ No newline at end of file