diff --git a/week1/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/Controller/HelloController.java b/week1/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/Controller/HelloController.java
new file mode 100644
index 0000000..69acb4a
--- /dev/null
+++ b/week1/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/Controller/HelloController.java
@@ -0,0 +1,52 @@
+package likelion.spring_prac;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+public class HelloController {
+
+    // 정적
+    @GetMapping("hello")
+    public String hello(Model model) {
+        model.addAttribute("data", "hello!!");
+        return "hello";
+    }
+
+    // MVC (파라미터로 값 받기)
+    @GetMapping("hello-mvc")
+    public String helloMvc(@RequestParam(value = "name") String name, Model model) {
+        model.addAttribute("name", name);
+        return "hello-template";
+    }
+
+    // API 단순 예
+    @GetMapping("hello-string")
+    @ResponseBody // HTTP의 바디 부분에 data를 직접 넣겠다
+    public String helloString(@RequestParam("name") String name) {
+        return "hello " + name;
+    }
+
+    // API 사용 예
+    @GetMapping("hello-api")
+    @ResponseBody
+    public Hello helloApi(@RequestParam("name") String name) {
+        Hello hello = new Hello(); // 객체 생성
+        hello.setName(name);
+        return hello;
+    }
+
+    static class Hello {
+        private String name;
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+    }
+}
diff --git "a/week2/taekyeongkim/01. \354\204\234\353\271\204\354\212\244 \352\260\234\353\260\234 & \355\205\214\354\212\244\355\212\270.md" "b/week2/taekyeongkim/01. \354\204\234\353\271\204\354\212\244 \352\260\234\353\260\234 & \355\205\214\354\212\244\355\212\270.md"
new file mode 100644
index 0000000..39aebda
--- /dev/null
+++ "b/week2/taekyeongkim/01. \354\204\234\353\271\204\354\212\244 \352\260\234\353\260\234 & \355\205\214\354\212\244\355\212\270.md"	
@@ -0,0 +1,541 @@
+# 1. 비즈니스 요구사항 정리
+
+### 일반적인 웹 어플리케이션 계층 구조
+  ![struct](./img/struct.png) 
+  - **컨트롤러** : 웹 MVC의 컨트롤러 역할
+  - **서비스** : 핵심 비즈니스 로직 구현
+  - **도메인** : 비즈니스 도메인 객체 - 주로 데이터베이스에 저장하고 관리 됨
+  - **리포지토리** : 데이터베이스에 접근, 도메인 객체를 DB에 저장하고 관리
+
+### 간단한 비즈니스 예제
+  - 데이터 : 회원ID, 이름
+  - 기능 : 회원 등록, 조회
+  - 아직 데이터 저장소가 선정되지 않음 (가상의 시나리오)
+
+  - 클래스 의존 관계
+      
+      : 아직 데이터 저장소가 선정 되지 않아서 일단은 메모리 기반 데이터 저장소 사용
+        (메모리에 저장할 수 있도록!)
+      
+      → 나중에 데이터 저장소를 넣을 것이기 때문에 interface 필요
+      
+      ⇒ 인터페이스로 구현 클래스를 변경할 수 있도록 설계
+      ![class_relations](./img/class_relations.png) 
+
+
+# 2. 회원 도메인과 레포지토리 생성
+
+### domain
+  : 프로젝트에 domain 패키지 추가
+
+  * Member class
+    : domain에 Member 클래스 추가
+
+    - 속성 추가
+      ```java
+      package likelion.spring_prac.domain;
+
+      public class Member {
+
+          private Long id;
+          private String name;
+      }
+      ```
+
+    - Getter, Setter 추가
+  
+
+### repository
+: 프로젝트에 repository 패키지 추가
+
+  * MemberRepository
+    : Interface로 생성
+    ```java
+    package likelion.spring_prac.repository;
+
+    import likelion.spring_prac.domain.Member;
+
+    import java.util.List;
+    import java.util.Optional;
+
+    public interface MemberRepository {
+        Member save(Member member);
+        // Optional : Null인 경우를 대비
+        Optional<Member> findById(Long id);
+        Optional<Member> findByName(String name);
+        List<Member> findAll(); // 저장된 모든 멤버 리스트 반환
+    }
+    ```
+
+  * MemoryMemberRepository
+    : Class로 생성
+
+    - implement methods (Alt + Enter)
+      ![implement methods](./img/implement%20methods.png)
+      -> 뜨는 옵션 전부 선택하여 OK
+
+    ```java
+    package likelion.spring_prac.repository;
+
+    import likelion.spring_prac.domain.Member;
+
+    import java.util.*;
+
+    public class MemoryMemberRepository implements MemberRepository{
+
+        // 저장할 곳이 필요
+        private static Map<Long, Member> store = new HashMap<>();
+        private static long sequence = 0L; // 키 값 생성
+        
+        @Override
+        public Member save(Member member) {
+            member.setId(++sequence);
+            store.put(member.getId(), member);
+            return member;
+        }
+
+        @Override
+        public Optional<Member> findById(Long id) {
+            // 단순히 store.get(id) 를 반환하지 않고 Optional로 감싸서 반환
+            // -> Null인 경우에 클라이언트 측에서 조치 가능
+            return Optional.ofNullable(store.get(id));
+        }
+
+        @Override
+        public Optional<Member> findByName(String name) {
+            return store.values().stream()
+                    .filter(member -> member.getName().equals(name))
+                    .findAny();
+        }
+
+        @Override
+        public List<Member> findAll() {
+            // store의 member들 반환
+            return new ArrayList<>(store.values());
+        }
+    }
+    ```
+
+# 3. 테스트 케이스 작성
+: 개발한 기능을 실행해서 테스트 할 때 자바의 main 메서드를 통해 실행하거나, 웹 어플리케이션의 컨트롤러를 통해서 해당 기능을 실행하면 준비하고 실행하는데 오래 걸리고, 반복 실행하기 어렵고, 여러 테스트를 한 번에 실행하기 어려움
+
+→ JAVA : **JUnit** 이라는 프레임워크로 테스트 실행
+
+* src/test/java/프로젝트 하위에 repository 생성
+* 생성한 repository 하위에 테스트하려는 Test 생성
+
+### MemoryMemberRepositoryTest
+: MemoryMemberRepositoryTest 클래스 생성
+  ```java
+  package likelion.spring_prac.repository;
+
+  import org.junit.jupiter.api.Test;
+
+  // public 일 필요 없어서 public 없앰
+  class MemoryMemberRepositoryTest {
+
+      MemberRepository repository = new MemoryMemberRepository();
+
+  }
+  ```
+
+  * save() 기능 확인
+    ```java
+    ...
+    class MemoryMemberRepositoryTest {
+
+        MemberRepository repository = new MemoryMemberRepository();
+
+        @Test
+        public void save() {
+
+        }
+    }
+    ```
+    -> save 함수 실행(run) 해보면서 확인
+
+  * test 객체 생성 및 확인
+    ```java
+    @Test
+    public void save() {
+        // 새로운 객체 생성, 이름 설정
+        Member member = new Member();
+        member.setName("spring");
+
+        repository.save(member);
+
+        // optional -> get으로 꺼내와서 result라는 Member 객체에 받아 봄
+        Member result = repository.findById(member.getId()).get();
+    }
+    ```
+### 결과 확인
+1. 직접 출력
+
+    : 터미널에 직접 글자가 찍히지만 잘 사용하지 않음
+    ```java
+    @Test
+    public void save() {
+        Member member = new Member();
+        member.setName("spring");
+        repository.save(member);
+        Member result = repository.findById(member.getId()).get();
+
+        System.out.println("result = " + (result == member));
+    }
+    ```
+
+2. Assertions
+
+    : 직접 출력은 아니지만 성공 시 → Process finished with exit code 0 (초록 체크), 실패 시 → error 발생
+  
+    * Assertions.assertEquals
+      ```java
+      @Test
+      public void save() {
+          Member member = new Member();
+          member.setName("spring");
+          repository.save(member);
+          Member result = repository.findById(member.getId()).get();
+
+          Assertions.assertEquals(member, result);
+      }
+      ```
+      +) 강제로 error 발생 시키는 코드 : `(Assertions.assertEquals(member, actual:null);`
+
+    * Assertions.assertThat
+      ```java
+      @Test
+      public void save() {
+          Member member = new Member();
+          member.setName("spring");
+          repository.save(member);
+          Member result = repository.findById(member.getId()).get();
+
+          Assertions.assertThat(member).isEqualTo(result);
+      }
+      ```
+      +) static으로 사용 : static import 추가(Alt + Enter)
+
+        → import로 import static org.assertj.core.api.Assertions.assertThat;가 추가 되고, 형태가 단순하게 (assertThat) 변함
+
+        => assertThat만 쳐서 사용 가능!
+
+      +) 강제로 error 발생 시키는 코드 : `assertThat(member).isEqualTo(null);`
+
+    +) 실무에서는 build 툴과 엮어서, testcase를 통과하지 못하면 넘어가지 않도록 설정
+
+### 다른 기능 동작 test
+* findByName() 
+  ```java
+  @Test
+  public void findByName() {
+      Member member1 = new Member();
+      member1.setName("spring1");
+      repository.save(member1);
+
+      Member member2 = new Member();
+      member2.setName("spring2");
+      repository.save(member2);
+
+      Member result = repository.findByName("spring1").get();
+      
+      assertThat(result).isEqualTo(member1);
+  }
+  ```
+
+* findByAll()
+  ```java
+  @Test
+  public void findAll() {
+      Member member1 = new Member();
+      member1.setName("spring1");
+      repository.save(member1);
+
+      Member member2 = new Member();
+      member2.setName("spring2");
+      repository.save(member2);
+
+      List<Member> result = repository.findAll();
+
+      assertThat(result.size()).isEqualTo(2);
+  }
+  ```
+
+### AfterEach, clearStore
+  * 전체 실행 : error 발생
+    - 이유 : 순서 보장 x (test에 여러 함수가 있을 때 실행 순서 보장 x)
+      -> 처음 실행하며 저장 된 객체가 다른 함수의 test에 쓰이면서 error 발생
+      => 각 test가 끝날 때마다 객체를 지워 repository를 깨끗하게 유지해야함
+
+    - 해결 : test 서로 의존 관계 없이 설계
+      -> 하나의 test 가 끝날 때마다 저장소나 공용 data들을 깔끔하게 지워주기
+  
+  * MemoryMemberRepositoryTest 시작부 수정
+
+    : MemoryMemberRepository 만 test 하는 것이라서 interface 말고 repository로 변경
+    - 기존 : `MemberRepository repository = new MemoryMemberRepository();`
+    - 수정 : `MemoryMemberRepository repository = new MemoryMemberRepository();`
+
+  * main의 MemoryMemberRepository에 clearStore() 추가
+    ```java
+    public void clearStore() {
+        store.clear();
+    }
+    ```
+
+  * AfterEach 추가
+
+    : test 가 실행 되고 끝날 때마다 repository를 한 번씩 지우도록
+    ```java
+    @AfterEach
+    public void afterEach() {
+        repository.clearStore();
+    }
+    ```
+    ![AfterEach](./img/AfterEach.png)
+
+### test 방식
+: 우리는 구현 클래스를 먼저 생성 -> test 작성
+
+* cf. TDD (테스트 주도 개발)
+    : test를 먼저 작성하고 main을 작성
+
+# 4. 회원 서비스 개발 & 테스트
+* 회원 서비스 Class : 회원 레포지토리와 도메인을 활용하여 실제 비즈니스 로직 작성
+  
+### Service
+: src/main/java/프로젝트/service 패키지 생성
+
+  * service에 MemberService 클래스 추가
+  * repository 생성
+    ```java
+    package likelion.spring_prac.service;
+
+    import likelion.spring_prac.domain.Member;
+    import likelion.spring_prac.repository.MemberRepository;
+    import likelion.spring_prac.repository.MemoryMemberRepository;
+
+    public class MemberService {
+
+        // repository 생성
+        private final MemberRepository memberRepository = new MemoryMemberRepository();
+    }
+    ```
+  * 회원 가입(join)
+    ```
+    ...
+    public class MemberService {
+        private final MemberRepository memberRepository = new MemoryMemberRepository();
+
+        /**
+        *  회원 가입
+        */
+        public Long join(Member member) {
+        
+        }
+    }
+    ```
+    +) **Optional** 형태
+
+      : `.get()` 으로 바로 꺼낼 수 있지만 권장하지는 않고, 위의 `.**ifPresent**()` 와 같은 메서드들을 사용하여 활용
+      
+      : get 대신 `.orElseGet()` 을 더 사용 - 값이 있으면 꺼내고, 없으면 method 실행 or default 값 넣어서 꺼내기 등의 동작
+
+    - Optional 반환 명시해서 사용
+      ```java
+      public Long join(Member member) {
+          // 로직 ex : 같은 이름의 중복 회원 불가
+          // memberRepository.findByName(member.getName());
+          Optional<Member> result = memberRepository.findByName(member.getName());
+          result.ifPresent(m -> {
+              throw new IllegalStateException("이미 존재하는 회원입니다.");
+          });
+              
+          memberRepository.save(member);
+          return member.getId();
+      }
+      ```
+
+    - Optional 명시 사용 x
+      ```java
+      public Long join(Member member) {
+          // 로직 ex : 같은 이름의 중복 회원 불가
+          // Optional -> ifPresent로 로직 구현
+          memberRepository.findByName(member.getName())
+                  .ifPresent(m -> {
+                      throw new IllegalStateException("이미 존재하는 회원입니다.");
+                  });
+
+          memberRepository.save(member);
+          return member.getId();
+      }
+      ```
+    
+    - method로 추출
+
+      : 하나의 기능 -> method로 추출하여 사용하기
+        (Ctrl + Alt + Shift + T)
+        ![ExtractMethod](./img/ExtractMethod.png)
+
+  * 회원 조회(find~)
+    - 전체 회원 조회
+      ```java
+      public List<Member> findMembers() {
+          return memberRepository.findAll();
+      }
+      ```
+
+    - 한 회원 조회
+      ```java
+      public Optional<Member> findOne(Long memberId) {
+          return memberRepository.findById(memberId);
+      }
+      ```
+
+
+### Test
+  * Test 간편하게 작성
+    : Test를 만들고자하는 class에서 Ctrl + Shift + T
+      -> Create New Test
+      ![CreateNewTest](./img/CreateNewTest.png)
+
+  * service 정의
+    ```java
+    class MemberServiceTest {
+
+        MemberService memberService = new MemberService();
+    }
+    ```
+
+  * 함수 정의
+    - given - when - then 패턴
+      
+      : 어떤 데이터를 기반으로 함 - 어떤 것을 검증 - 검증부
+    
+    - 회원가입
+      ```java
+      @Test
+      void 회원가입() { // test code는 함수 이름이 심지어 한글이어도 괜찮음
+          //given
+          Member member = new Member();
+          member.setName("hello");
+
+          //when
+          Long saveId = memberService.join(member);
+
+          //then
+          Member findMember = memberService.findOne(saveId).get();
+          assertThat(member.getName()).isEqualTo(findMember.getName());
+
+      }
+      ```
+      : 정상 flow test -> 예외 flow test가 더 중요하므로 중복 회원 예외 처리 필요
+
+    - 중복 회원 예외
+      ```java
+      @Test
+      public void 중복_회원_예외() {
+          // given
+          Member member1 = new Member();
+          member1.setName("spring");
+
+          Member member2 = new Member();
+          member2.setName("spring");
+
+          //when
+          memberService.join(member1);
+
+          try {
+              memberService.join(member2);
+              fail();
+          } catch (IllegalStateException e) {
+              // 예외가 터지는 상황에서 예외가 터짐 = 정상적 동작
+              assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.")
+          }
+
+          //then
+      }
+      ```
+      `assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.")`
+      : 실제 main 함수의 예외 처리에서 “이미 존재하는 회원입니다.”가 나오도록 되어 있어서 그 text와 일치하는지 check
+
+      -> 코드 개선 - assertThrows
+        ```java
+        @Test
+        public void 중복_회원_예외() {
+            // given
+            Member member1 = new Member();
+            member1.setName("spring");
+            Member member2 = new Member();
+            member2.setName("spring");
+
+            //when
+            memberService.join(member1);
+            assertThrows(IllegalStateException.class, () -> memberService.join(member2));
+            //then
+        }
+        ```
+        +) assertThrows는 메세지가 반환이 되므로 다음과 같이 확인 가능하다
+          ```
+          memberService.join(member1);
+          assertThrows(IllegalStateException.class, () -> memberService.join(member2));
+          assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.")
+          ```
+
+    - 매 테스트마다 clear
+      : join을 반복하며 data가 쌓여 test가 제대로 되지 않으므로 clear 필요
+      ```java
+      class MemberServiceTest {
+
+          MemberService memberService = new MemberService();
+          MemoryMemberRepository memoryMemberRepository = new MemoryMemberRepository();
+          
+          @AfterEach
+          public void afterEach() {
+              memoryMemberRepository.clearStore();
+          }
+          ...
+      }
+      ```
+      
+      -> 그런데, MemberService에 이미 레포지터리 객체 생성이 존재함. 
+     = 서로 다른 레포지터리 (서로 다른 인스턴스)
+
+     (현재는 store 객체가 static으로 되어 있어 문제가 생기지 않지만, static이 아니면 다른 DB가 되며 문제 발생 (?))
+     (+ 문제가 생기지 않더라도 같은 인스턴스로 구성하는 것이 맞음)
+
+     => 객체 선언 수정 (DI)
+
+  * DI (Dependenacy Injection)
+
+    : 직접 new로 생성하지 않고, 외부에서 넣어줌
+
+    - main의 MemberService 수정
+      ```java
+      ...
+      public class MemberService {
+          // repository 생성
+          // 기존 : private final MemberRepository memberRepository = new MemoryMemberRepository();
+          private final MemberRepository memberRepository;
+          // repository 를 직접 생성하는 것이 아니라 외부에서 넣어주도록 바꿈
+          public MemberService(MemberRepository memberRepository) {
+              this.memberRepository = memberRepository;
+          }
+          ...
+      }
+      ```
+
+    - test의 MemberServiceTest 수정
+      ```java
+      MemberService memberService;
+      MemoryMemberRepository memberRepository;
+
+      // 각 테스트를 실행하기 전에 만들고 넣어줌
+      @BeforeEach
+      public void beforeEach() {
+          memberRepository = new MemoryMemberRepository();
+          memberService = new MemberService(memberRepository);
+      }
+      ```
+    
+    => 같은 MemoryMemberRepository 가 사용 됨!
\ No newline at end of file
diff --git "a/week2/taekyeongkim/02. Spring bin, \354\235\230\354\241\264\352\264\200\352\263\204.md" "b/week2/taekyeongkim/02. Spring bin, \354\235\230\354\241\264\352\264\200\352\263\204.md"
new file mode 100644
index 0000000..f83c664
--- /dev/null
+++ "b/week2/taekyeongkim/02. Spring bin, \354\235\230\354\241\264\352\264\200\352\263\204.md"	
@@ -0,0 +1,277 @@
+# 스프링 빈
+
+### 정형화된 패턴
+: **컨트롤러**(외부 요청 받기), **서비스**(비즈니스 로직), **리포지토리**(데이터 저장)
+
+### 의존관계
+
+- controller가 service에 의존 (의존관계가 있다)
+    
+  : controller가 service를 통해 로직을 거쳐 data가 저장 되고, data 조회를 할 수 있음
+    
+  ![SpringContainer](./img/SpringContainer.png)
+  : memberService 와 memberRepository 가 스프링 컨테이너에 스프링 빈으로 등록 됨
+  
+  : memberService는 memberRepository가 필요함
+
+### 스프링 빈 등록
+  : 스프링은 스프링 컨테이너에 스프링 빈을 등록할 때 기본적으로 싱글톤으로 등록 (유일하게 하나만 등록하여 공유)
+  
+  ⇒ 같은 스프링 빈이면 모두 같은 인스턴스
+
+  +) helloControler는 스프링이 제공하는 컨트롤러여서 스프링 빈으로 자동 등록 됨
+
+  * 스프링 빈 등록 방법
+    1. **컴포넌트 스캔과 자동 의존관계 설정**
+        - 컴포넌트 스캔 : @Controller, @Service, .. 등 명시
+        - 자동 의존관계 : @Autowired
+            
+        +) @Autowired 는 스프링이 관리하는 객체에서만 동작 
+            
+          : 스프링 빈으로 등록하지 않고 내가 직접 생성한 객체에서는 동작 x 
+            
+        
+    2. **자바 코드로 직접 스프링 빈 등록**
+        
+        : SpringConfig 파일에 빈에 등록할 것들 정의
+        
+    
+    → 정형화된 컨트롤러, 서비스, 리포지토리 같은 코드는 컴포넌트 스캔 사용
+    
+    → 정형화되지 않거나, 상황에 따라 구현 클래스를 변경해야 하면 설정을 통해 빈 등록
+
+         ex) DB 대신 MemoryMemberRepository를 사용하다가 나중에 DB로 리포지토리를 
+               바꿀 것인데, 이런 경우 컨피그 파일을 변경하면 되므로 간편
+    
+
+- DI 주입 방법
+    
+    : 생성자 주입 사용 권장 - 의존관계가 실행중에 동적으로 변하지 않으므로
+    
+    - **생성자 주입**
+        
+        : 어플리케이션이 조립 되는 시점에 한 번 들어오고 끝
+        
+        ```java
+        @Controller
+        public class MemberController {
+        
+            private final MemberService memberService;
+        
+            // 생성자
+            @Autowired
+            public MemberController(MemberService memberService) {
+                this.memberService = memberService;
+            }
+        }
+        ```
+        
+    - 필드 주입
+        
+        ```java
+        @Controller
+        public class MemberController {
+        
+            @Autowired private final MemberService memberService;
+        }
+        ```
+        
+    - Setter 주입
+        
+        +) Generate : Alt + Insert → Getter and Setter 생성
+        
+        ```java
+        @Controller
+        public class MemberController {
+        
+        		private MemberService memberService;
+        
+            @Autowired
+            public void setmemberService(MemberService memberService) {
+                this.memberService = memberService;
+            }
+        }
+        ```
+        
+
+# 1. 컴포넌트 스캔과 자동 의존관계 설정
+: 회원 컨트롤러가 회원서비스와 회원 리포지토리를 사용할 수 있도록 의존관계 준비
+
+* 컴포넌트 스캔과 자동 의존관계 설정
+  - 컴포넌트 스캔 : @Controller, @Service, .. 등 명시
+  - 자동 의존관계 : @Autowired
+  
+### Controller
+: MemberController 생성
+  * @Controller 어노테이션
+    : 어노테이션이 붙은 class의 객체를 생성하여 spring 컨테이너에 넣어두고, sprig이 관리 = 컨테이너에서 Spring bin이 관리 됨
+    ![MmberController](./img/MemberController.png)
+    -> MemberController 객체를 생성하여 관리
+
+
+### 객체 공용으로 선언 : 컨테이너에 등록
+**`private final** MemberService memberService = **new** MemberService();`
+
+위처럼 new로 선언할 수 있지만, 
+컨테이너에 등록을 하고 + 컨테이너에서 받아서 쓰도록 바꿔야 함
+
+(다른 controller에서 MemberService를 가져다 쓰는 경우도 존재하므로)
+
+* 생성자 위에 **@Autowired** 어노테이션
+    
+  : 스프링 컨테이너에 있는 객체 가져와서 연결 시켜 줌
+      (스프링이 연관된 객체를 스프링 컨테이너에서 찾아서 넣어줌)
+    
+    = **DI** (Dependency Injection) : 의존성 주입
+        : 객체 의존 관계를 외부에서 넣어주는 것
+    
+    ```java
+    @Controller
+    public class MemberController {
+    
+        private final MemberService memberService;
+    
+        // 생성자
+        @Autowired
+        public MemberController(MemberService memberService) {
+            this.memberService = memberService;
+        }
+    }
+    ```
+    
+    → 이것만으로는 오류 발생 : ‘memberService가 스프링 빈으로 등록되어 있지 x’
+    
+    (MemberService class가 순수 java 코드라 스프링이 알 수 없음)
+    
+    ⇒ **@Service** 어노테이션 추가
+    
+    : 스프링이 서비스를 인지 → 컨테이너에 등록 해 둠
+    ```java
+    @Service
+    public class MemberService{
+      ...
+    }
+    ```
+    
+    +) repository에는 @Repository 추가
+    ```java
+    @Repository
+    public class MemoryMemberRepository{
+      ...
+    }
+    ```
+    
+    = 정형화된 패턴 
+        : 컨트롤러(외부 요청 받기), 서비스(비즈니스 로직), 리포지토리(데이터 저장)
+    
+
+- MemberService
+    
+    ```java
+    @Service
+    public class MemberService {
+    
+        private final MemberRepository memberRepository;
+        
+        **@Autowired**
+        public MemberService(MemberRepository memberRepository) {
+            this.memberRepository = memberRepository;
+        }
+        ...
+    }
+    ```
+    
+    : Service를 스프링 컨테이너에 등록하면서, MemberService 생성자 호출
+    
+    → @Autowired 가 존재 ⇒ repository가 필요하구나 → 스프링 컨테이너에 있는 memberRepository 넣어 줌
+
+
+# 2. 자바 코드로 직접 스프링 빈 등록
+:  @Service, @Repository, @Autowired 어노테이션 제거하고 진행
+
+: 직접 설정 파일에 정의
+
+### SpringConfig
+: 프로젝트에 새로운 Class인 SpringConfig 생성
+
+- **@Configuration**
+    
+    ```java
+    package likelion.spring_prac;
+    
+    import likelion.spring_prac.service.MemberService;
+    import org.springframework.context.annotation.Bean;
+    import org.springframework.context.annotation.Configuration;
+    
+    @Configuration
+    public class SpringConfig {
+    
+    }
+    ```
+    
+* **@Bean**
+    
+  : 스프링 빈에 등록하라는 표시
+    
+    ```java
+    package likelion.spring_prac;
+    
+    import likelion.spring_prac.service.MemberService;
+    import org.springframework.context.annotation.Bean;
+    import org.springframework.context.annotation.Configuration;
+    
+    @Configuration
+    public class SpringConfig {
+    
+        @Bean
+        public MemberService memberService() {
+            return new MemberService();
+        }    
+    }
+    ```
+    
+  → Ctrl + P 로 생성자에 넣어야 할 값 확인
+    
+    ![CtrlP](./img/CtrlP.png)
+    
+    ⇒ MemberRepository 등록 필요
+    
+    ```java
+    ...
+    @Configuration
+    public class SpringConfig {
+    
+        @Bean
+        public MemberService memberService() {
+            return new MemberService(memberRepository());
+        }
+    
+        @Bean
+        public MemberRepository memberRepository() {
+            return new MemoryMemberRepository();
+        }   
+    }
+    ```
+    
+    → 다음 그림의 구조가 완성 됨
+      ![SpringContainer](./img/SpringContainer.png)
+
+      : memberService 와 memberRepository 가 스프링 컨테이너에 스프링 빈으로 등록 됨
+      : memberService는 memberRepository가 필요함
+    
+
++) Controller는 어쩔 수 없음 - **@Autowired** 사용
+
+```java
+@Controller
+public class MemberController {
+
+    private final MemberService memberService;
+
+    // 생성자
+    @Autowired
+    public MemberController(MemberService memberService) {
+        this.memberService = memberService;
+    }
+}
+```
\ No newline at end of file
diff --git a/week2/taekyeongkim/img/AfterEach.png b/week2/taekyeongkim/img/AfterEach.png
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diff --git a/week2/taekyeongkim/img/CreateNewTest.png b/week2/taekyeongkim/img/CreateNewTest.png
new file mode 100644
index 0000000..0a8b1e1
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diff --git a/week2/taekyeongkim/img/CtrlP.png b/week2/taekyeongkim/img/CtrlP.png
new file mode 100644
index 0000000..90a64f5
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diff --git a/week2/taekyeongkim/img/ExtractMethod.png b/week2/taekyeongkim/img/ExtractMethod.png
new file mode 100644
index 0000000..b4a2442
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diff --git a/week2/taekyeongkim/img/SpringContainer.png b/week2/taekyeongkim/img/SpringContainer.png
new file mode 100644
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diff --git a/week2/taekyeongkim/img/class_relations.png b/week2/taekyeongkim/img/class_relations.png
new file mode 100644
index 0000000..03c91bf
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diff --git a/week2/taekyeongkim/img/implement methods.png b/week2/taekyeongkim/img/implement methods.png
new file mode 100644
index 0000000..a634219
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diff --git a/week2/taekyeongkim/img/struct.png b/week2/taekyeongkim/img/struct.png
new file mode 100644
index 0000000..5d857f2
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diff --git a/week2/taekyeongkim/spring-prac/.gitignore b/week2/taekyeongkim/spring-prac/.gitignore
new file mode 100644
index 0000000..c2065bc
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/.gitignore
@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
diff --git a/week2/taekyeongkim/spring-prac/build.gradle b/week2/taekyeongkim/spring-prac/build.gradle
new file mode 100644
index 0000000..a4863f5
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/build.gradle
@@ -0,0 +1,29 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.3.3'
+	id 'io.spring.dependency-management' version '1.1.6'
+}
+
+group = 'likelion'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(17)
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
diff --git a/week2/taekyeongkim/spring-prac/gradle/wrapper/gradle-wrapper.jar b/week2/taekyeongkim/spring-prac/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..e644113
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diff --git a/week2/taekyeongkim/spring-prac/gradle/wrapper/gradle-wrapper.properties b/week2/taekyeongkim/spring-prac/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..a441313
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/week2/taekyeongkim/spring-prac/gradlew b/week2/taekyeongkim/spring-prac/gradlew
new file mode 100644
index 0000000..b740cf1
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/gradlew
@@ -0,0 +1,249 @@
+#!/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.
+#
+
+##############################################################################
+#
+#   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 "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&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/week2/taekyeongkim/spring-prac/gradlew.bat b/week2/taekyeongkim/spring-prac/gradlew.bat
new file mode 100644
index 0000000..25da30d
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/gradlew.bat
@@ -0,0 +1,92 @@
+@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
+
+@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/week2/taekyeongkim/spring-prac/settings.gradle b/week2/taekyeongkim/spring-prac/settings.gradle
new file mode 100644
index 0000000..4f12dc5
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'spring-prac'
diff --git a/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/SpringConfig.java b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/SpringConfig.java
new file mode 100644
index 0000000..828527c
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/SpringConfig.java
@@ -0,0 +1,22 @@
+package likelion.spring_prac;
+
+import likelion.spring_prac.repository.MemberRepository;
+import likelion.spring_prac.repository.MemoryMemberRepository;
+import likelion.spring_prac.service.MemberService;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class SpringConfig {
+
+    @Bean
+    public MemberService memberService() {
+        return new MemberService(memberRepository());
+    }
+
+    @Bean
+    public MemberRepository memberRepository() {
+        return new MemoryMemberRepository();
+    }
+    
+}
diff --git a/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/SpringPracApplication.java b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/SpringPracApplication.java
new file mode 100644
index 0000000..9bd31c2
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/SpringPracApplication.java
@@ -0,0 +1,13 @@
+package likelion.spring_prac;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringPracApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SpringPracApplication.class, args);
+	}
+
+}
diff --git a/week1/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/controller/HelloController.java b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/controller/HelloController.java
similarity index 100%
rename from week1/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/controller/HelloController.java
rename to week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/controller/HelloController.java
diff --git a/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/controller/MemberController.java b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/controller/MemberController.java
new file mode 100644
index 0000000..dab568b
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/controller/MemberController.java
@@ -0,0 +1,23 @@
+package likelion.spring_prac.controller;
+
+import likelion.spring_prac.service.MemberService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+
+@Controller
+public class MemberController {
+
+    private final MemberService memberService;
+
+    // 생성자
+    @Autowired
+    public MemberController(MemberService memberService) {
+        this.memberService = memberService;
+    }
+
+//    @Autowired
+//    public void setmemberService(MemberService memberService) {
+//        this.memberService = memberService;
+//    }
+
+}
diff --git a/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/domain/Member.java b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/domain/Member.java
new file mode 100644
index 0000000..1abaca3
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/domain/Member.java
@@ -0,0 +1,23 @@
+package likelion.spring_prac.domain;
+
+public class Member {
+
+    private Long id;
+    private String name;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
diff --git a/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/repository/MemberRepository.java b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/repository/MemberRepository.java
new file mode 100644
index 0000000..bf48aaf
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/repository/MemberRepository.java
@@ -0,0 +1,14 @@
+package likelion.spring_prac.repository;
+
+import likelion.spring_prac.domain.Member;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface MemberRepository {
+    Member save(Member member);
+    // Optional : Null인 경우를 대비
+    Optional<Member> findById(Long id);
+    Optional<Member> findByName(String name);
+    List<Member> findAll(); // 저장된 모든 멤버 리스트 반환
+}
diff --git a/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/repository/MemoryMemberRepository.java b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/repository/MemoryMemberRepository.java
new file mode 100644
index 0000000..59a3fd2
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/repository/MemoryMemberRepository.java
@@ -0,0 +1,44 @@
+package likelion.spring_prac.repository;
+
+import likelion.spring_prac.domain.Member;
+
+import java.util.*;
+
+//@Repository
+public class MemoryMemberRepository implements MemberRepository{
+
+    // 저장할 곳이 필요
+    private static Map<Long, Member> store = new HashMap<>();
+    private static long sequence = 0L; // 키 값 생성
+    
+    @Override
+    public Member save(Member member) {
+        member.setId(++sequence);
+        store.put(member.getId(), member);
+        return member;
+    }
+
+    @Override
+    public Optional<Member> findById(Long id) {
+        // 단순히 store.get(id) 를 반환하지 않고 Optional로 감싸서 반환
+        // -> Null인 경우에 클라이언트 측에서 조치 가능
+        return Optional.ofNullable(store.get(id));
+    }
+
+    @Override
+    public Optional<Member> findByName(String name) {
+        return store.values().stream()
+                .filter(member -> member.getName().equals(name))
+                .findAny();
+    }
+
+    @Override
+    public List<Member> findAll() {
+        // store의 member들 반환
+        return new ArrayList<>(store.values());
+    }
+
+    public void clearStore() {
+        store.clear();
+    }
+}
diff --git a/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/service/MemberService.java b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/service/MemberService.java
new file mode 100644
index 0000000..57456cc
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/java/likelion/spring_prac/service/MemberService.java
@@ -0,0 +1,50 @@
+package likelion.spring_prac.service;
+
+import likelion.spring_prac.domain.Member;
+import likelion.spring_prac.repository.MemberRepository;
+
+import java.util.List;
+import java.util.Optional;
+
+//@Service
+public class MemberService {
+
+    // repository 생성
+    // private final MemberRepository memberRepository = new MemoryMemberRepository();
+    private final MemberRepository memberRepository;
+    // repository 를 직접 생성하는 것이 아니라 외부에서 넣어주도록 바꿈
+    //@Autowired
+    public MemberService(MemberRepository memberRepository) {
+        this.memberRepository = memberRepository;
+    }
+
+    /**
+     *  회원 가입
+     */
+    public Long join(Member member) {
+        // 로직 ex : 같은 이름의 중복 회원 불가
+        // Optional -> ifPresent로 로직 구현
+        validateDuplicateMember(member); // 중복 회원 검증
+        memberRepository.save(member);
+        return member.getId();
+    }
+
+    // 중복 회원 검증
+    private void validateDuplicateMember(Member member) {
+        memberRepository.findByName(member.getName())
+                .ifPresent(m -> {
+                    throw new IllegalStateException("이미 존재하는 회원입니다.");
+                });
+    }
+
+    /**
+     *  회원 조회
+     */
+    public List<Member> findMembers() {
+        return memberRepository.findAll();
+    }
+
+    public Optional<Member> findOne(Long memberId) {
+        return memberRepository.findById(memberId);
+    }
+}
diff --git a/week2/taekyeongkim/spring-prac/src/main/resources/application.properties b/week2/taekyeongkim/spring-prac/src/main/resources/application.properties
new file mode 100644
index 0000000..2a12994
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/resources/application.properties
@@ -0,0 +1 @@
+spring.application.name=spring-prac
diff --git a/week2/taekyeongkim/spring-prac/src/main/resources/static/hello-static.html b/week2/taekyeongkim/spring-prac/src/main/resources/static/hello-static.html
new file mode 100644
index 0000000..68254b2
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/resources/static/hello-static.html
@@ -0,0 +1,10 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+    <title>static content</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+</head>
+<body>
+정적 컨텐츠 입니다.
+</body>
+</html>
\ No newline at end of file
diff --git a/week2/taekyeongkim/spring-prac/src/main/resources/static/index.html b/week2/taekyeongkim/spring-prac/src/main/resources/static/index.html
new file mode 100644
index 0000000..8ceff60
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/resources/static/index.html
@@ -0,0 +1,10 @@
+<!doctype html>
+<html>
+<head>
+    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
+    <title>Document</title>
+</head>
+<body>
+Hello
+</body>
+</html>
\ No newline at end of file
diff --git a/week2/taekyeongkim/spring-prac/src/main/resources/templates/hello-template.html b/week2/taekyeongkim/spring-prac/src/main/resources/templates/hello-template.html
new file mode 100644
index 0000000..0ba5236
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/resources/templates/hello-template.html
@@ -0,0 +1,5 @@
+<html xmlns:th="http://www.thymeleaf.org">
+<body>
+<p th:text="'hello ' + ${name}" >hello! empty</p>
+</body>
+</html>
diff --git a/week2/taekyeongkim/spring-prac/src/main/resources/templates/hello.html b/week2/taekyeongkim/spring-prac/src/main/resources/templates/hello.html
new file mode 100644
index 0000000..d91952b
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/main/resources/templates/hello.html
@@ -0,0 +1,10 @@
+<!doctype html>
+<html>
+<head>
+    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
+    <title>Document</title>
+</head>
+<body>
+<p th:text="'안녕하세요. ' + ${data}" >안녕하세요. 손님</p>
+</body>
+</html>
\ No newline at end of file
diff --git a/week2/taekyeongkim/spring-prac/src/test/java/likelion/spring_prac/SpringPracApplicationTests.java b/week2/taekyeongkim/spring-prac/src/test/java/likelion/spring_prac/SpringPracApplicationTests.java
new file mode 100644
index 0000000..d2c4791
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/test/java/likelion/spring_prac/SpringPracApplicationTests.java
@@ -0,0 +1,13 @@
+package likelion.spring_prac;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class SpringPracApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}
diff --git a/week2/taekyeongkim/spring-prac/src/test/java/likelion/spring_prac/repository/MemoryMemberRepositoryTest.java b/week2/taekyeongkim/spring-prac/src/test/java/likelion/spring_prac/repository/MemoryMemberRepositoryTest.java
new file mode 100644
index 0000000..b4756f2
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/test/java/likelion/spring_prac/repository/MemoryMemberRepositoryTest.java
@@ -0,0 +1,73 @@
+package likelion.spring_prac.repository;
+
+import likelion.spring_prac.domain.Member;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+// public 일 필요 없어서 public 없앰
+class MemoryMemberRepositoryTest {
+
+    // MemberRepository repository = new MemoryMemberRepository();
+    // |-> MemoryMemberRepository만 test 하는 것이므로 interface가 아닌 MemoryMemberRepository로 변경
+    MemoryMemberRepository repository = new MemoryMemberRepository();
+
+    @AfterEach
+    public void afterEach() {
+        repository.clearStore();
+    }
+
+    // save 기능이 동작하는지 test 해보고자 함
+    @Test
+    public void save() {
+        Member member = new Member();
+        member.setName("spring");
+
+        repository.save(member);
+
+        // optional -> get으로 꺼내와서 result라는 Member 객체에 받아 봄
+        Member result = repository.findById(member.getId()).get();
+
+        // 직접 글자 찍기
+        // : System.out.println("result = " + (result == member));
+
+        // 직접 출력은 아니지만 돌렸을 때 아무것도 안 나오고 초록색 체크
+        // Assertions.assertEquals(member, result);
+        // 만약 실패하면 (ex) (Assertions.assertEquals(member, actual:null);) -> error 뜸
+
+        assertThat(member).isEqualTo(result);
+    }
+
+    @Test
+    public void findByName() {
+        Member member1 = new Member();
+        member1.setName("spring1");
+        repository.save(member1);
+
+        Member member2 = new Member();
+        member2.setName("spring2");
+        repository.save(member2);
+
+        Member result = repository.findByName("spring1").get();
+
+        assertThat(result).isEqualTo(member1);
+    }
+
+    @Test
+    public void findAll() {
+        Member member1 = new Member();
+        member1.setName("spring1");
+        repository.save(member1);
+
+        Member member2 = new Member();
+        member2.setName("spring2");
+        repository.save(member2);
+
+        List<Member> result = repository.findAll();
+
+        assertThat(result.size()).isEqualTo(2);
+    }
+}
diff --git a/week2/taekyeongkim/spring-prac/src/test/java/likelion/spring_prac/service/MemberServiceTest.java b/week2/taekyeongkim/spring-prac/src/test/java/likelion/spring_prac/service/MemberServiceTest.java
new file mode 100644
index 0000000..7118e19
--- /dev/null
+++ b/week2/taekyeongkim/spring-prac/src/test/java/likelion/spring_prac/service/MemberServiceTest.java
@@ -0,0 +1,86 @@
+package likelion.spring_prac.service;
+
+import likelion.spring_prac.domain.Member;
+import likelion.spring_prac.repository.MemberRepository;
+import likelion.spring_prac.repository.MemoryMemberRepository;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+class MemberServiceTest {
+
+    // MemberService memberService = new MemberService();
+    // MemoryMemberRepository memoryMemberRepository = new MemoryMemberRepository();
+
+    MemberService memberService;
+    MemoryMemberRepository memberRepository;
+
+    // 각 테스트를 실행하기 전에 만들고 넣어줌
+    @BeforeEach
+    public void beforeEach() {
+        memberRepository = new MemoryMemberRepository();
+        memberService = new MemberService(memberRepository);
+    }
+
+
+    @AfterEach
+    public void afterEach() {
+        memoryMemberRepository.clearStore();
+    }
+
+    @Test
+    void 회원가입() { // test code는 함수 이름이 심지어 한글이어도 괜찮음
+        //given
+        Member member = new Member();
+        member.setName("hello");
+
+        //when
+        Long saveId = memberService.join(member);
+
+        //then
+        Member findMember = memberService.findOne(saveId).get();
+        assertThat(member.getName()).isEqualTo(findMember.getName());
+
+    }
+
+    @Test
+    public void 중복_회원_예외() {
+        // given
+        Member member1 = new Member();
+        member1.setName("spring");
+
+        Member member2 = new Member();
+        member2.setName("spring");
+
+        //when
+        memberService.join(member1);
+        IllegalStateException e = assertThrows(IllegalStateException.class, () -> memberService.join(member2));
+
+        assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.")
+/*
+        try {
+            memberService.join(member2);
+            fail();
+        } catch (IllegalStateException e) {
+            // 예외가 터지는 상황에서 예외가 터짐 = 정상적 동작
+            assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.")
+        }
+
+        //then
+    }
+ */
+
+    @Test
+    void findMembers() {
+        // given
+        //when
+        //then
+    }
+
+    @Test
+    void findOne() {
+    }
+}
\ No newline at end of file
diff --git a/week3/taekyeongkim/MemberPrac.md b/week3/taekyeongkim/MemberPrac.md
new file mode 100644
index 0000000..efb6422
--- /dev/null
+++ b/week3/taekyeongkim/MemberPrac.md
@@ -0,0 +1,409 @@
+# 프로젝트 생성
+[start.spring.io](https://start.spring.io/)
+
+![startspring](./img/startspring.png)
+
+→ 인텔리제이 내부에서 바로 생성 가능 (하긴 한데 사이트 사용이 편했음)
+
+# h2 디비 설치/연결
+### h2 디비 설치
+  [Downloads](https://www.h2database.com/html/download.html)
+
+  h2 디비 설치
+
+  ![h2](./img/h2.png)
+
+  → Zip 파일 다운로드
+
+  h2 데이터베이스 설치 후 → 압축 풀고 → h2/bin 들어가기  (window : h2 bat 파일)
+
+  ![h2bat](./img/h2bat.png)
+
+### 디비 연결
+  * 만약 접속 URL이 IP주소로 되어 있다면 → localhost로 변경
+  
+    - 처음 : IP 주소로 되어 있음
+    ![ip](./img/ip.png)
+      
+    - -> localhost로 변경
+    ![local](./img/local.png)
+    
+  * jdbc:h2:~/example 형태로 url 설정 (example 자리에는 자기가 원하는 이름으로)
+  ![url](./img/url.png)
+  
+  * 로컬에 .mv.db 파일 생성 됨
+  ![mv](./img/mv.png)
+
+  * yml 파일 설정을 통해 프로젝트와 디비 연결 가능
+
+    : 파일 설정 후 프로젝트 실행
+
+    ![run](./img/run_dbcheck.png)
+    ![run](./img/run_h2dbcheck.png)
+
+
+# 코드
+### application.yml
+  : resources 패키지 내부에 [application.properties](http://application.properties) 삭제 후 → application.yml 파일 생성
+
+  ```java
+  spring:
+    datasource:
+      url: jdbc:h2:tcp://localhost/~/week2Prac  //본인 h2 디비 url
+      username: sa                              //기본 설정 값 그대로 두기
+      password: //"00"                          //본인 설정 따라 : 없애도 됨
+      driver-class-name: org.h2.Driver
+
+    jpa:
+      hibernate:
+        ddl-auto: create
+      properties:
+        hibernate:
+          format_sql: true
+
+  logging:
+    level:
+      org.hibernate.SQL: debug
+      org.hibernate.orm.jdbc.bind: trace
+  ```
+
+### domain/Member.java
+  : 멤버로 id, name, email을 갖는 멤버 엔티티 정의
+
+  ```java
+  package likelion.week2Prac.domain;
+
+  import jakarta.persistence.*;
+  import lombok.AllArgsConstructor;
+  import lombok.Builder;
+  import lombok.Getter;
+  import lombok.NoArgsConstructor;
+  import org.springframework.data.annotation.CreatedDate;
+  import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+  import java.time.LocalDateTime;
+
+  @Entity    //entity 클래스임
+  @Builder   //객체 생성 패턴 - 빌더 패턴 사용
+  @NoArgsConstructor      // 파라미터가 없는 디폴트 생성자 자동 생성
+  @AllArgsConstructor     // 모든 필드 값을 파라미터로 받는 생성자 자동 생성
+  @Getter    // 멤버 필드의 getter 들 자동 생성 (이 경우 : getId, getName, getEmail)
+  @EntityListeners(AuditingEntityListener.class)
+  public class Member {
+      @Id     // PK 명시
+      @GeneratedValue(strategy = GenerationType.IDENTITY)   // 기본키 값 자동 생성
+      @Column(name="member_id")       // 필드와 디비 컬럼 매핑
+      
+      private Long id;
+      private String name;
+      private String email;
+
+      @CreatedDate
+      private LocalDateTime createdAt;
+  }
+  ```
+
+### controller/MemberController.java
+  : 클라이언트로부터 request를 받고 response를 하는 모든 api 정의
+  * **`@RequiredArgsConstructor`**
+    
+    : Lombok으로 스프링에서 DI(의존성 주입)의 방법 중에 
+    생성자 주입을 임의의 코드 없이 자동으로 설정해주는 어노테이션
+    (Lombok에서 @Getter, @Setter 어노테이션처럼 클래스에 선언된 final 변수들, 필드들을 매개변수로 하는 생성자를 자동으로 생성해주는 어노테이션)
+
+    - 새로운 필드를 추가할 때 다시 생성자를 만들어서 관리해야하는 번거로움 x
+    - 초기화 되지않은 final 필드나, @NonNull 이 붙은 필드에 대해 생성자를 생성
+        
+        = `@Autowired` 사용 없이 의존성 주입
+        
+        - @RequiredArgsConstructor 어노테이션 사용하지 않았을 때
+            
+            ```java
+            @RestController
+            @RequestMapping("/example")
+            public class RequiredArgsConstructorControllerExample {
+            
+              private final FirstService firstService;
+              private final SecondService secondService;
+              private final ThirdService thirdService;
+              
+              @Autowired
+              public RequiredArgsConstructorControllerExample(FirstService firstService, SecondService secondService, ThirdService thirdService) {
+                this.firstRepository = firstRepository;
+                this.secondRepository = secondRepository;
+                this.thirdRepository = thirdRepository;
+              }
+            ```
+            
+        - @RequiredArgsConstructor 어노테이션 사용했을 때
+            ```java
+            @RestController
+            @RequiredArgsConstructor
+            @RequestMapping("/example")
+            public class RequiredArgsConstructorControllerExample {
+
+              private final FirstService firstService;
+              private final SecondService secondService;
+              private final ThirdService thirdService;
+              
+              ...
+            }
+            ```
+  * `ResponseEntity<?>`
+  
+    : 반환 타입이 명확하지 않아도 return이 가능한데, (ex : `ResponseEntity<Object>`) 타입을 여러 개 받고 싶은 경우에 `Object` 대신 와일드카드(`?`)를 사용한다.
+    
+    [ResponseEntity의 사용법 및 유지보수](https://stir.tistory.com/343)
+
+      
+
+  ```java
+  package likelion.week2Prac.controller;
+
+  import likelion.week2Prac.domain.Member;
+  import likelion.week2Prac.dto.MemberRequestDTO;
+  import likelion.week2Prac.service.MemberService;
+  import lombok.RequiredArgsConstructor;
+  import org.springframework.http.ResponseEntity;
+  import org.springframework.web.bind.annotation.*;
+
+  import java.util.List;
+  import java.util.Optional;
+
+  @RestController                // restcontroller 임
+  @RequiredArgsConstructor       // 생성자 의존성 주입 자동
+  @RequestMapping("/members") // 공통 엔드포인트
+  public class MemberController {
+
+      private final MemberService memberService;
+
+      // POST 요청 처리
+      @PostMapping
+      public ResponseEntity<?> createMember(@RequestBody MemberRequestDTO memberRequestDTO) {
+          Member member = memberService.createMember(memberRequestDTO);
+          return ResponseEntity.status(201).body(member);
+      }
+
+      // GET 요청 처리
+      @GetMapping
+      public ResponseEntity<?> getMemberList() {
+          try{
+              List<Member> response;
+              response = memberService.getMemberList();
+              if(response.isEmpty()){
+                  return ResponseEntity.status(200).body("사용자가 존재하지 않습니다."); //200, 빈 리스트 반환
+              }
+              return ResponseEntity.ok(response);
+          } catch (Exception e){
+              return ResponseEntity.status(500).body("서버 내부 에러");
+          }
+      }
+
+      @GetMapping("/{memberId}")
+      public ResponseEntity<?> getOneMember(@PathVariable Long memberId) {
+          try{
+              Optional<Member> response = memberService.getOneMember(memberId);
+              if (response.isPresent()) {
+                  return ResponseEntity.ok(response.get());
+              } else {
+                  return ResponseEntity.status(404).body("해당 사용자를 찾을 수 없습니다.");
+              }
+          }catch (Exception e){
+              return ResponseEntity.status(500).body("서버 내부 에러");
+          }
+      }
+  }
+  ```
+
+### service/MemberService.java
+  : 비지니스 로직 - controller가 요청받은 작업을 할 수 있는 메소드들 정의
+
+  * **`@RequiredArgsConstructor`**
+
+    :  `@Autowired` 사용 없이 의존성 주입
+
+    - @RequiredArgsConstructor 어노테이션 사용하지 않았을 때
+        
+        ```java
+        @Service
+        public class MemberService {
+          private final MemberRepository memberRepository;
+          
+          ...
+          
+          **@Autowired
+          public MemberService(MemberRepository memberRepository){
+            this.memberRepository = memberRepository;
+          }**
+        }
+        ```
+        
+    - @RequiredArgsConstructor 어노테이션 사용했을 때
+        
+        ```java
+        @Service
+        @RequiredArgsConstructor
+        public class MemberService {
+          private final MemberRepository memberRepository;
+          
+          ...
+          
+        }
+        ```
+    
+
+```java
+package likelion.week2Prac.service;
+
+import likelion.week2Prac.domain.Member;
+import likelion.week2Prac.dto.MemberRequestDTO;
+import likelion.week2Prac.repository.MemberRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service                    // service 클래스임
+@RequiredArgsConstructor    // 생성자 자동 생성
+public class MemberService {
+
+    private final MemberRepository memberRepository;
+
+    public Member createMember(MemberRequestDTO memberRequestDTO){
+        Member member = Member.builder()
+                .name(memberRequestDTO.name())
+                .email(memberRequestDTO.email())
+                .build();
+
+        Member savedMember = memberRepository.save(member);
+        return savedMember;
+    }
+    public List<Member> getMemberList(){
+        return memberRepository.findAll();
+    }
+
+    public Optional<Member> getOneMember(Long memberId){
+        return memberRepository.findById(memberId);
+    }
+}
+```
+
+
+### repository/MemberRepository.java
+  : DB와 통신
+
+  : interface로 생성
+
+  * JPA 활용
+
+    : **JpaRepository**를 extends 하는 repository 클래스 생성
+
+    ⇒ JPA 제공 기본 메서드 = 기본적인 CRUD 기능 제공 (→ 복잡한 쿼리문 사용 x)
+                                                  (findAll(), findById(), save() 등)
+
+    - **JPA** (Java Persistence Api) : 객체와 관계형 디비 사이에서 매핑 역할
+    - **JpaRepository**  : Spring Data JPA에서 제공하는 인터페이스
+        
+        [JpaRepository (Spring Data JPA Parent 3.3.3 API)](https://docs.spring.io/spring-data/jpa/docs/current/api/org/springframework/data/jpa/repository/JpaRepository.html)
+        
+
+    + if) JPA를 활용하지 않고 jdbc (쿼리문 api)를 사용한다면?
+
+    ```java
+    // 1. 데이터베이스 연결
+    Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");
+
+    // 2. SQL 쿼리 작성 및 실행
+    String sql = "SELECT * FROM users WHERE id = ?";
+    PreparedStatement statement = connection.prepareStatement(sql);
+    statement.setInt(1, 1);
+    ResultSet resultSet = statement.executeQuery();
+
+    // 3. 결과 처리
+    while (resultSet.next()) {
+        String name = resultSet.getString("name");
+        System.out.println(name);
+    }
+
+    // 4. 연결 해제
+    resultSet.close();
+    statement.close();
+    connection.close();
+    ```
+
+    ⇒ JPA 활용
+
+    ```java
+    public void printUserNameById(Long id) {
+            User user = userRepository.findById(id).orElse(null);
+            if (user != null) {
+                System.out.println(user.getName());
+            }
+        }
+    ```
+
+
+  ```java
+  package likelion.week2Prac.repository;
+
+  import likelion.week2Prac.domain.Member;
+  import org.springframework.data.jpa.repository.JpaRepository;
+  import org.springframework.stereotype.Repository;
+
+  @Repository     // repository 클래스임
+  public interface MemberRepository extends JpaRepository<Member, Long> {
+  }
+  ```
+
+### dto/MemberRequestDTO.java
+  : (serializer와 비슷한 기능을 하는) Data Transmition Object
+
+  * Record 문법을 사용하지 않은 DTO
+    ```java
+    package mutsa.second.demo.dto;
+
+    import lombok.AllArgsConstructor;
+    import lombok.Builder;
+    import lombok.Data;
+    import lombok.NoArgsConstructor;
+
+    @Builder
+    @NoArgsConstructor
+    @AllArgsConstructor
+    @Data   // getter, setter, toString, equals, hashCode, 기본 생성자까지 자동으로 생성
+    public class example {
+        private String name;
+        private String email;
+    }
+    ```
+  
+  ```java
+  package likelion.week2Prac.dto;
+
+  public record MemberRequestDTO(String name, String email) {
+  }
+  ```
+
+# 포스트맨
+### POST
+: localhost:8080/members
+
+  * createdAt이 null로 들어가는 오류 발견
+
+    => **@EnableJpaAuditing**
+
+      : domain에서 createdAt을 위한 어노테이션 중 `@EntityListeners(AuditingEntityListener.class)` 가 있었는데, 이것은 Auditing을 사용하겠다는 코드이고, 이를 활성화하기 위한 코드(`@EnableJpaAuditing`)를 application.java 파일에 추가해줘야 함
+  
+  ![post](./Postman_img/POST_members-1.png)
+  ![post](./Postman_img/POST_members-2.png)
+
+### GET
+  * localhost:8080/members
+    ![get](./Postman_img/GET_members.png)
+  * localhost:8080/members/{id}
+    ![get](./Postman_img/GET_members-1.png)
+    ![get](./Postman_img/GET_members-2.png)
+
+### DB 확인
+  ![db](./img/DB.png)
\ No newline at end of file
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diff --git a/week3/taekyeongkim/img/url.png b/week3/taekyeongkim/img/url.png
new file mode 100644
index 0000000..abfb407
Binary files /dev/null and b/week3/taekyeongkim/img/url.png differ
diff --git a/week3/taekyeongkim/week2Prac/.gitignore b/week3/taekyeongkim/week2Prac/.gitignore
new file mode 100644
index 0000000..c2065bc
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/.gitignore
@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
diff --git a/week3/taekyeongkim/week2Prac/build.gradle b/week3/taekyeongkim/week2Prac/build.gradle
new file mode 100644
index 0000000..c847557
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/build.gradle
@@ -0,0 +1,39 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.3.3'
+	id 'io.spring.dependency-management' version '1.1.6'
+}
+
+group = 'likelion'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(17)
+	}
+}
+
+configurations {
+	compileOnly {
+		extendsFrom annotationProcessor
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	compileOnly 'org.projectlombok:lombok'
+	runtimeOnly 'com.h2database:h2'
+	annotationProcessor 'org.projectlombok:lombok'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
diff --git a/week3/taekyeongkim/week2Prac/gradle/wrapper/gradle-wrapper.jar b/week3/taekyeongkim/week2Prac/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..a4b76b9
Binary files /dev/null and b/week3/taekyeongkim/week2Prac/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/week3/taekyeongkim/week2Prac/gradle/wrapper/gradle-wrapper.properties b/week3/taekyeongkim/week2Prac/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..0aaefbc
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/week3/taekyeongkim/week2Prac/gradlew b/week3/taekyeongkim/week2Prac/gradlew
new file mode 100644
index 0000000..f5feea6
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/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/week3/taekyeongkim/week2Prac/gradlew.bat b/week3/taekyeongkim/week2Prac/gradlew.bat
new file mode 100644
index 0000000..9d21a21
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/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/week3/taekyeongkim/week2Prac/settings.gradle b/week3/taekyeongkim/week2Prac/settings.gradle
new file mode 100644
index 0000000..61b9bfe
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'week2Prac'
diff --git a/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/Week2PracApplication.java b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/Week2PracApplication.java
new file mode 100644
index 0000000..d844ada
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/Week2PracApplication.java
@@ -0,0 +1,15 @@
+package likelion.week2Prac;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
+
+@SpringBootApplication
+@EnableJpaAuditing
+public class Week2PracApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Week2PracApplication.class, args);
+	}
+
+}
diff --git a/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/controller/MemberController.java b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/controller/MemberController.java
new file mode 100644
index 0000000..579e21a
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/controller/MemberController.java
@@ -0,0 +1,55 @@
+package likelion.week2Prac.controller;
+
+import likelion.week2Prac.domain.Member;
+import likelion.week2Prac.dto.MemberRequestDTO;
+import likelion.week2Prac.service.MemberService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+import java.util.Optional;
+
+@RestController                // restcontroller 임
+@RequiredArgsConstructor       // 생성자 의존성 주입 자동
+@RequestMapping("/members") // 공통 엔드포인트
+public class MemberController {
+
+    private final MemberService memberService;
+
+    // POST 요청 처리
+    @PostMapping
+    public ResponseEntity<?> createMember(@RequestBody MemberRequestDTO memberRequestDTO) {
+        Member member = memberService.createMember(memberRequestDTO);
+        return ResponseEntity.status(201).body(member);
+    }
+
+    // GET 요청 처리
+    @GetMapping
+    public ResponseEntity<?> getMemberList() {
+        try{
+            List<Member> response;
+            response = memberService.getMemberList();
+            if(response.isEmpty()){
+                return ResponseEntity.status(200).body("사용자가 존재하지 않습니다."); //200, 빈 리스트 반환
+            }
+            return ResponseEntity.ok(response);
+        } catch (Exception e){
+            return ResponseEntity.status(500).body("서버 내부 에러");
+        }
+    }
+
+    @GetMapping("/{memberId}")
+    public ResponseEntity<?> getOneMember(@PathVariable Long memberId) {
+        try{
+            Optional<Member> response = memberService.getOneMember(memberId);
+            if (response.isPresent()) {
+                return ResponseEntity.ok(response.get());
+            } else {
+                return ResponseEntity.status(404).body("해당 사용자를 찾을 수 없습니다.");
+            }
+        }catch (Exception e){
+            return ResponseEntity.status(500).body("서버 내부 에러");
+        }
+    }
+}
diff --git a/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/domain/Member.java b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/domain/Member.java
new file mode 100644
index 0000000..169379b
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/domain/Member.java
@@ -0,0 +1,30 @@
+package likelion.week2Prac.domain;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import java.time.LocalDateTime;
+
+@Entity     //entity 클래스임
+@Builder    //객체 생성 패턴 - 빌더 패턴 사용
+@NoArgsConstructor      // 파라미터가 없는 디폴트 생성자 자동 생성
+@AllArgsConstructor     // 모든 필드 값을 파라미터로 받는 생성자 자동 생성
+@Getter     // 멤버 필드의 getter 들 자동 생성 (이 경우 : getId, getName, getEmail)
+@EntityListeners(AuditingEntityListener.class)
+public class Member {
+    @Id     // PK 명시
+    @GeneratedValue(strategy = GenerationType.IDENTITY)     // 기본키 값 자동 생성
+    @Column(name="member_id")       // 필드와 디비 컬럼 매핑
+    
+    private Long id;
+    private String name;
+    private String email;
+
+    @CreatedDate
+    private LocalDateTime createdAt;
+}
diff --git a/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/dto/MemberRequestDTO.java b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/dto/MemberRequestDTO.java
new file mode 100644
index 0000000..1a2ccdc
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/dto/MemberRequestDTO.java
@@ -0,0 +1,4 @@
+package likelion.week2Prac.dto;
+
+public record MemberRequestDTO(String name, String email) {
+}
\ No newline at end of file
diff --git a/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/repository/MemberRepository.java b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/repository/MemberRepository.java
new file mode 100644
index 0000000..1702228
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/repository/MemberRepository.java
@@ -0,0 +1,9 @@
+package likelion.week2Prac.repository;
+
+import likelion.week2Prac.domain.Member;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository     // repository 클래스임
+public interface MemberRepository extends JpaRepository<Member, Long> {
+}
diff --git a/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/service/MemberService.java b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/service/MemberService.java
new file mode 100644
index 0000000..d7738ac
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/src/main/java/likelion/week2Prac/service/MemberService.java
@@ -0,0 +1,34 @@
+package likelion.week2Prac.service;
+
+import likelion.week2Prac.domain.Member;
+import likelion.week2Prac.dto.MemberRequestDTO;
+import likelion.week2Prac.repository.MemberRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service                    // service 클래스임
+@RequiredArgsConstructor    // 생성자 자동 생성
+public class MemberService {
+
+    private final MemberRepository memberRepository;
+
+    public Member createMember(MemberRequestDTO memberRequestDTO){
+        Member member = Member.builder()
+                .name(memberRequestDTO.name())
+                .email(memberRequestDTO.email())
+                .build();
+
+        Member savedMember = memberRepository.save(member);
+        return savedMember;
+    }
+    public List<Member> getMemberList(){
+        return memberRepository.findAll();
+    }
+
+    public Optional<Member> getOneMember(Long memberId){
+        return memberRepository.findById(memberId);
+    }
+}
diff --git a/week3/taekyeongkim/week2Prac/src/main/resources/application.yml b/week3/taekyeongkim/week2Prac/src/main/resources/application.yml
new file mode 100644
index 0000000..2acc829
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/src/main/resources/application.yml
@@ -0,0 +1,18 @@
+spring:
+  datasource:
+    url: jdbc:h2:tcp://localhost/~/week2Prac
+    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
+    org.hibernate.orm.jdbc.bind: trace
\ No newline at end of file
diff --git a/week3/taekyeongkim/week2Prac/src/test/java/likelion/week2Prac/Week2PracApplicationTests.java b/week3/taekyeongkim/week2Prac/src/test/java/likelion/week2Prac/Week2PracApplicationTests.java
new file mode 100644
index 0000000..8086f8a
--- /dev/null
+++ b/week3/taekyeongkim/week2Prac/src/test/java/likelion/week2Prac/Week2PracApplicationTests.java
@@ -0,0 +1,13 @@
+package likelion.week2Prac;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class Week2PracApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}