From 098a8c29245e164e80d4e2bbc35b9695b09e2cb5 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Fri, 3 Oct 2025 17:17:56 +0900 Subject: [PATCH 01/17] Update README.md --- README.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/README.md b/README.md index 395edc5..82642b2 100644 --- a/README.md +++ b/README.md @@ -1 +1,3 @@ # backend-study-sns + +강준이 From 3d54a1fe17f3315982c7340a09fbd545c7913d97 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Sun, 5 Oct 2025 23:20:01 +0900 Subject: [PATCH 02/17] chore: add JPA and Lombok dependencies --- build.gradle | 8 +++++++ .../com/example/devSns/controller/explanation | 1 + .../java/com/example/devSns/dto/explanation | 8 +++++++ .../com/example/devSns/entity/PostEntity.java | 0 .../com/example/devSns/entity/explanation | 22 +++++++++++++++++++ .../com/example/devSns/repository/explanation | 1 + .../com/example/devSns/service/explanation | 1 + 7 files changed, 41 insertions(+) create mode 100644 src/main/java/com/example/devSns/controller/explanation create mode 100644 src/main/java/com/example/devSns/dto/explanation create mode 100644 src/main/java/com/example/devSns/entity/PostEntity.java create mode 100644 src/main/java/com/example/devSns/entity/explanation create mode 100644 src/main/java/com/example/devSns/repository/explanation create mode 100644 src/main/java/com/example/devSns/service/explanation diff --git a/build.gradle b/build.gradle index 610d6a6..c78d56d 100644 --- a/build.gradle +++ b/build.gradle @@ -19,8 +19,16 @@ repositories { } dependencies { + // Lombok + compileOnly 'org.projectlombok:lombok' + annotationProcessor 'org.projectlombok:lombok' + implementation 'org.springframework.boot:spring-boot-starter-web' + implementation 'org.springframework.boot:spring-boot-starter-data-jpa' + implementation 'org.springframework.boot:spring-boot-starter-jdbc' + implementation 'org.springframework.boot:spring-boot-starter-thymeleaf' testImplementation 'org.springframework.boot:spring-boot-starter-test' + runtimeOnly 'com.h2database:h2' // 임시 메모리 DB testRuntimeOnly 'org.junit.platform:junit-platform-launcher' } diff --git a/src/main/java/com/example/devSns/controller/explanation b/src/main/java/com/example/devSns/controller/explanation new file mode 100644 index 0000000..3191f3e --- /dev/null +++ b/src/main/java/com/example/devSns/controller/explanation @@ -0,0 +1 @@ +요청을 받는 곳 \ No newline at end of file diff --git a/src/main/java/com/example/devSns/dto/explanation b/src/main/java/com/example/devSns/dto/explanation new file mode 100644 index 0000000..095c837 --- /dev/null +++ b/src/main/java/com/example/devSns/dto/explanation @@ -0,0 +1,8 @@ +계층간 데이터 교환에 사용 +- Entity 클래스를 보호 +- 필요한 데이터만 선택적으로 담을 수 있음 + +분리해서 사용하는 이유 +- Entity 객체의 변경을 피하기 위함 +- 클라이언트와 통신하는 ResponseDTO나 RequestDTO는 요구사항에 따라 자주 변경 +- 어떤 요청에서는 특정 값이 추가되거나 없을 수 있어서 분리해서 관리 \ No newline at end of file diff --git a/src/main/java/com/example/devSns/entity/PostEntity.java b/src/main/java/com/example/devSns/entity/PostEntity.java new file mode 100644 index 0000000..e69de29 diff --git a/src/main/java/com/example/devSns/entity/explanation b/src/main/java/com/example/devSns/entity/explanation new file mode 100644 index 0000000..402a31e --- /dev/null +++ b/src/main/java/com/example/devSns/entity/explanation @@ -0,0 +1,22 @@ +데이터베이스와 직접적으로 맞닿는 핵심적인 클래스 +- entity를 기준으로 테이블 생성 +- Builder 패턴을 사용해서 필요한 값만 넣음 + +PostEntity 객체가 곧 DB의 한 행(row) +-> 기본 키는 id이고, 나머지는 속성임을 명시하는 클래스 + +@Entity +데이터베이스 테이블과 매핑 +- JPA가 이 클래스를 테이블로 인식 +- 데이터베이스 테이블로 매핑할 수 있게 함 + +@Id +해당 필드가 기본 키임을 나타냄 +- JPA에서 이 필드는 각 행을 고유하게 식별하는 기준 + +@GeneratedValue +기본 키의 값을 자동 생성할 때 어떤 전략을 쓸지 지정 +GenerationType.IDENTITY는 자동 증가 + +@Getter, @Setter (Lombok) +보일러플레이트 제거 \ No newline at end of file diff --git a/src/main/java/com/example/devSns/repository/explanation b/src/main/java/com/example/devSns/repository/explanation new file mode 100644 index 0000000..97a040b --- /dev/null +++ b/src/main/java/com/example/devSns/repository/explanation @@ -0,0 +1 @@ +데이터베이스 접근 (JPA 인터페이스) \ No newline at end of file diff --git a/src/main/java/com/example/devSns/service/explanation b/src/main/java/com/example/devSns/service/explanation new file mode 100644 index 0000000..7417adb --- /dev/null +++ b/src/main/java/com/example/devSns/service/explanation @@ -0,0 +1 @@ +비지니스 로직 담당 \ No newline at end of file From 2ded9e9a476a70f082d8378cd63dc9ba70ba46ce Mon Sep 17 00:00:00 2001 From: junyi04 Date: Sun, 5 Oct 2025 23:25:04 +0900 Subject: [PATCH 03/17] feat(docs): add PostEntity and explanation --- .../com/example/devSns/entity/PostEntity.java | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/src/main/java/com/example/devSns/entity/PostEntity.java b/src/main/java/com/example/devSns/entity/PostEntity.java index e69de29..058a89a 100644 --- a/src/main/java/com/example/devSns/entity/PostEntity.java +++ b/src/main/java/com/example/devSns/entity/PostEntity.java @@ -0,0 +1,22 @@ +package com.example.devSns.entity; + +import jakarta.persistence.Entity; +import jakarta.persistence.GeneratedValue; +import jakarta.persistence.GenerationType; +import jakarta.persistence.Id; +import lombok.Getter; +import lombok.Setter; + +@Entity +@Getter +@Setter +public class PostEntity { + + @Id + @GeneratedValue(strategy = GenerationType.IDENTITY) + private Long id; + + private String title; + private String content; + private String author; +} \ No newline at end of file From 259201710a9469596ddb17f88c199ac178d0bdee Mon Sep 17 00:00:00 2001 From: junyi04 Date: Sun, 5 Oct 2025 23:28:38 +0900 Subject: [PATCH 04/17] feat(docs): add PostRepository and explanation --- .../java/com/example/devSns/repository/PostRepository.java | 7 +++++++ src/main/java/com/example/devSns/repository/explanation | 6 +++++- 2 files changed, 12 insertions(+), 1 deletion(-) create mode 100644 src/main/java/com/example/devSns/repository/PostRepository.java diff --git a/src/main/java/com/example/devSns/repository/PostRepository.java b/src/main/java/com/example/devSns/repository/PostRepository.java new file mode 100644 index 0000000..d6e24c5 --- /dev/null +++ b/src/main/java/com/example/devSns/repository/PostRepository.java @@ -0,0 +1,7 @@ +package com.example.devSns.repository; + +import com.example.devSns.entity.PostEntity; +import org.springframework.data.jpa.repository.JpaRepository; + +public interface PostRepository extends JpaRepository { +} diff --git a/src/main/java/com/example/devSns/repository/explanation b/src/main/java/com/example/devSns/repository/explanation index 97a040b..235ff10 100644 --- a/src/main/java/com/example/devSns/repository/explanation +++ b/src/main/java/com/example/devSns/repository/explanation @@ -1 +1,5 @@ -데이터베이스 접근 (JPA 인터페이스) \ No newline at end of file +데이터베이스 접근 (JPA 인터페이스) + +PostRepository +상속만 하면 기본 CRUD가 다 생김 +- save, findAll, findById, deleteById From a8694623d8149b1c8a16be2e99a09e3b715de7c4 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Sun, 5 Oct 2025 23:45:04 +0900 Subject: [PATCH 05/17] feat(docs): add PostService and explanation --- .../example/devSns/service/PostService.java | 46 +++++++++++++++++++ .../com/example/devSns/service/explanation | 34 +++++++++++++- 2 files changed, 79 insertions(+), 1 deletion(-) create mode 100644 src/main/java/com/example/devSns/service/PostService.java diff --git a/src/main/java/com/example/devSns/service/PostService.java b/src/main/java/com/example/devSns/service/PostService.java new file mode 100644 index 0000000..c9630f9 --- /dev/null +++ b/src/main/java/com/example/devSns/service/PostService.java @@ -0,0 +1,46 @@ +package com.example.devSns.service; + +import com.example.devSns.entity.PostEntity; +import com.example.devSns.repository.PostRepository; +import org.springframework.stereotype.Service; +import org.springframework.transaction.annotation.Transactional; + +import java.util.List; + +@Service +@Transactional(readOnly = true) +public class PostService { + private final PostRepository postRepository; + + // 생성자 + public PostService(PostRepository postRepository) { + this.postRepository = postRepository; + } + + public List getAllPosts() { + return postRepository.findAll(); + } + + public PostEntity getPost(Long id) { + return postRepository.findById(id).orElseThrow(); + } + + @Transactional + public PostEntity createPost(PostEntity postEntity) { + return postRepository.save(postEntity); + } + + @Transactional + public PostEntity updatePost(Long id, PostEntity updated) { + PostEntity postEntity = postRepository.findById(id).orElseThrow(); + postEntity.setTitle(updated.getTitle()); + postEntity.setContent(updated.getContent()); + return postRepository.save(postEntity); + } + + @Transactional + public void deletePost(Long id) { + postRepository.deleteById(id); + } + +} diff --git a/src/main/java/com/example/devSns/service/explanation b/src/main/java/com/example/devSns/service/explanation index 7417adb..09b39f6 100644 --- a/src/main/java/com/example/devSns/service/explanation +++ b/src/main/java/com/example/devSns/service/explanation @@ -1 +1,33 @@ -비지니스 로직 담당 \ No newline at end of file +비지니스 로직 담당 + +PostService + +@Service +비지니스 로직이 모이는 곳 +- 트랜잭션을 붙여야 할 때도 주로 서비스에서 +- 의존성 주입 (생성자 주입) + +@Transactional(readOnly = true) +읽기 성능 최적화 +- 원자성 보장 +- 안전빵 + +private final PostRepository postRepository; +- 의존성으로 받는 레포지토리 +- 생성자 주입 +- JpaRepository 상속 + +findAll() +- 모든 게시글 조회 + +findById() +- getPost 함수에서 PK(id)로 단건 조회 +- updatePost 함수에서 수정 대상 로드, 필드 갱신, 저장 + +save +- 새 엔터티 저장 +- id가 없으면 persist, 있으면 merge + +deleteById +- PK(id)로 삭제 + From 9346fa92ae83ccd151afc02a412334540f5f73c2 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Mon, 6 Oct 2025 00:02:45 +0900 Subject: [PATCH 06/17] feat(docs): add PostController and explanation --- .../devSns/controller/PostController.java | 54 +++++++++++++++++++ .../com/example/devSns/controller/explanation | 25 ++++++++- 2 files changed, 78 insertions(+), 1 deletion(-) create mode 100644 src/main/java/com/example/devSns/controller/PostController.java diff --git a/src/main/java/com/example/devSns/controller/PostController.java b/src/main/java/com/example/devSns/controller/PostController.java new file mode 100644 index 0000000..99dc55a --- /dev/null +++ b/src/main/java/com/example/devSns/controller/PostController.java @@ -0,0 +1,54 @@ +package com.example.devSns.controller; + +import com.example.devSns.entity.PostEntity; +import com.example.devSns.service.PostService; +import org.springframework.stereotype.Controller; +import org.springframework.ui.Model; +import org.springframework.web.bind.annotation.*; + +@Controller +@RequestMapping("/posts") +public class PostController { + + private final PostService postService; + + // 생성자 + public PostController(PostService postService) { + this.postService = postService; + } + + // HTTP GET /posts + @GetMapping + public String list(Model model) { + model.addAttribute("posts", postService.getAllPosts()); + return "list"; + } + + // HTTP GET /posts/new + @GetMapping("/new") + public String form(Model model) { + model.addAttribute("post", new PostEntity()); + return "form"; + } + + // HTTP POST /posts + @PostMapping + public String create(@ModelAttribute PostEntity postEntity) { + postService.createPost(postEntity); + return "redirect:/posts"; + } + + // HTTP GET /posts/{id} + @GetMapping("/{id}") + public String detail(@PathVariable Long id, Model model) { + model.addAttribute("post", postService.getPost(id)); + return "detail"; + } + + // HTTP POST /posts/{id}/delete + @PostMapping("/{id}/delete") + public String delete(@PathVariable Long id) { + postService.deletePost(id); + return "redirect:/posts"; + } +} diff --git a/src/main/java/com/example/devSns/controller/explanation b/src/main/java/com/example/devSns/controller/explanation index 3191f3e..d86130e 100644 --- a/src/main/java/com/example/devSns/controller/explanation +++ b/src/main/java/com/example/devSns/controller/explanation @@ -1 +1,24 @@ -요청을 받는 곳 \ No newline at end of file +요청을 받는 곳 + +PostController +Spring MVC 패턴에서 Controller 계층 역할 +- 사용자의 요청을 받고 Service 계층을 호출해서 처리한 후, 결과를 View에 전달 + +@Controller +이 클래스는 웹 요청을 처리하는 컨트롤러임을 알려줌 +- Model에 데이터를 담아 템플릿에 전달 (templates/list.html) + +@RequestMapping +클래스 전체의 기본 URL 경로를 지정 +- 이 컨트롤러 안의 모든 요청은 /posts로 시작 +- /posts (게시글 목록), /posts/new (새 글 작성 폼) + +@GetMapping, @PostMapping +HTTP 메서드 별 라우팅 + +@PathVariable, @ModelAttribute +URL 경로 변수 바인딩 / 폼 데이터를 객체에 바인딩 + +@RestController +문자열 반환이 뷰 이름이 아닌 JSON +- REST API 만들 때 사용 \ No newline at end of file From e22712679ec7e479cba646ca81dd9e1d8540705c Mon Sep 17 00:00:00 2001 From: junyi04 Date: Mon, 6 Oct 2025 00:10:07 +0900 Subject: [PATCH 07/17] feat: create templates/list.html (/posts/new) --- src/main/resources/templates/list.html | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 src/main/resources/templates/list.html diff --git a/src/main/resources/templates/list.html b/src/main/resources/templates/list.html new file mode 100644 index 0000000..712cbd7 --- /dev/null +++ b/src/main/resources/templates/list.html @@ -0,0 +1,12 @@ + + + +

게시판

+ 새 글 쓰기 +
    +
  • + +
    • +
+ + \ No newline at end of file From 96b956f37e5a15f397b812cb1ee9bbd5e5089ac7 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Mon, 6 Oct 2025 00:14:23 +0900 Subject: [PATCH 08/17] feat: create templates/form.html (/posts) --- src/main/resources/templates/form.html | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 src/main/resources/templates/form.html diff --git a/src/main/resources/templates/form.html b/src/main/resources/templates/form.html new file mode 100644 index 0000000..52849d8 --- /dev/null +++ b/src/main/resources/templates/form.html @@ -0,0 +1,12 @@ + + + +

새 글 작성

+
+ + + + +
+ + \ No newline at end of file From 845bb2d8175c93927a949ad46053d2ed2e4227d2 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Mon, 6 Oct 2025 00:18:19 +0900 Subject: [PATCH 09/17] feat: create templates/detail.html (/posts/{id}/delete) --- src/main/resources/templates/detail.html | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 src/main/resources/templates/detail.html diff --git a/src/main/resources/templates/detail.html b/src/main/resources/templates/detail.html new file mode 100644 index 0000000..c585343 --- /dev/null +++ b/src/main/resources/templates/detail.html @@ -0,0 +1,15 @@ + + + +

제목

+

내용

+

+ 작성자: + +

+ +
+ +
+ + \ No newline at end of file From eb68811505190ff85662afb6d25ad349f4803f97 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Mon, 6 Oct 2025 00:33:59 +0900 Subject: [PATCH 10/17] chore: update H2 database and JPA configuration --- src/main/resources/application.properties | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties index f3f10af..8bef822 100644 --- a/src/main/resources/application.properties +++ b/src/main/resources/application.properties @@ -1 +1,23 @@ spring.application.name=devSns + +# ?? ?? +server.port=8080 + +# H2 ???? DB +spring.datasource.url=jdbc:h2:mem:testdb;MODE=MySQL;DATABASE_TO_UPPER=false +spring.datasource.driver-class-name=org.h2.Driver +spring.datasource.username=sa +spring.datasource.password= + +# JPA +spring.jpa.hibernate.ddl-auto=update +spring.jpa.show-sql=true +spring.jpa.properties.hibernate.format_sql=true + +# H2 ?? +spring.h2.console.enabled=true +spring.h2.console.path=/h2-console + +# Thymeleaf(??? ??? ?? ?) +spring.thymeleaf.cache=false + From 8000aaf512e2de6767950b7867370aebf04fbc31 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Mon, 6 Oct 2025 00:40:39 +0900 Subject: [PATCH 11/17] fix: correct typo in list.html&detail.html th name --- src/main/resources/templates/detail.html | 2 +- src/main/resources/templates/list.html | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/src/main/resources/templates/detail.html b/src/main/resources/templates/detail.html index c585343..016c58c 100644 --- a/src/main/resources/templates/detail.html +++ b/src/main/resources/templates/detail.html @@ -8,7 +8,7 @@

내용

-
+
diff --git a/src/main/resources/templates/list.html b/src/main/resources/templates/list.html index 712cbd7..bd6df84 100644 --- a/src/main/resources/templates/list.html +++ b/src/main/resources/templates/list.html @@ -5,7 +5,7 @@

게시판

새 글 쓰기
  • - +
From 7437ff5bf7a2046c7c4fc61a0cf7b97dffc4b756 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Tue, 7 Oct 2025 22:30:07 +0900 Subject: [PATCH 12/17] feat: add createdAt, updatedAt fields and connect CRUD --- .../devSns/controller/PostController.java | 2 +- .../com/example/devSns/entity/PostEntity.java | 21 +++++++++++++++---- .../example/devSns/service/PostService.java | 2 +- src/main/resources/application.properties | 2 +- src/main/resources/templates/list.html | 9 +++++++- 5 files changed, 28 insertions(+), 8 deletions(-) diff --git a/src/main/java/com/example/devSns/controller/PostController.java b/src/main/java/com/example/devSns/controller/PostController.java index 99dc55a..bc9fd9c 100644 --- a/src/main/java/com/example/devSns/controller/PostController.java +++ b/src/main/java/com/example/devSns/controller/PostController.java @@ -51,4 +51,4 @@ public String delete(@PathVariable Long id) { postService.deletePost(id); return "redirect:/posts"; } -} +} \ No newline at end of file diff --git a/src/main/java/com/example/devSns/entity/PostEntity.java b/src/main/java/com/example/devSns/entity/PostEntity.java index 058a89a..ccaad1a 100644 --- a/src/main/java/com/example/devSns/entity/PostEntity.java +++ b/src/main/java/com/example/devSns/entity/PostEntity.java @@ -1,12 +1,11 @@ package com.example.devSns.entity; -import jakarta.persistence.Entity; -import jakarta.persistence.GeneratedValue; -import jakarta.persistence.GenerationType; -import jakarta.persistence.Id; +import jakarta.persistence.*; import lombok.Getter; import lombok.Setter; +import java.time.LocalDateTime; + @Entity @Getter @Setter @@ -19,4 +18,18 @@ public class PostEntity { private String title; private String content; private String author; + + private LocalDateTime createdAt; + private LocalDateTime updatedAt; + + @PrePersist + protected void onCreate() { + this.createdAt = LocalDateTime.now(); + this.updatedAt = LocalDateTime.now(); + } + + @PreUpdate + protected void onUpdated() { + this.updatedAt = LocalDateTime.now(); + } } \ No newline at end of file diff --git a/src/main/java/com/example/devSns/service/PostService.java b/src/main/java/com/example/devSns/service/PostService.java index c9630f9..c66c5cb 100644 --- a/src/main/java/com/example/devSns/service/PostService.java +++ b/src/main/java/com/example/devSns/service/PostService.java @@ -43,4 +43,4 @@ public void deletePost(Long id) { postRepository.deleteById(id); } -} +} \ No newline at end of file diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties index 8bef822..6f74611 100644 --- a/src/main/resources/application.properties +++ b/src/main/resources/application.properties @@ -1,7 +1,7 @@ spring.application.name=devSns # ?? ?? -server.port=8080 +server.port=8081 # H2 ???? DB spring.datasource.url=jdbc:h2:mem:testdb;MODE=MySQL;DATABASE_TO_UPPER=false diff --git a/src/main/resources/templates/list.html b/src/main/resources/templates/list.html index bd6df84..c444459 100644 --- a/src/main/resources/templates/list.html +++ b/src/main/resources/templates/list.html @@ -6,7 +6,14 @@

게시판

  • +
    + + 작성일: + + / + 수정일: + +
- \ No newline at end of file From bbc2f3d48a3bcb0ad9b610c7e4d9aae95af8ece3 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Tue, 7 Oct 2025 22:52:18 +0900 Subject: [PATCH 13/17] feat: implement edit feature with update API and edit.html --- .../devSns/controller/PostController.java | 19 +++++++++++++++++-- src/main/resources/application.properties | 2 +- src/main/resources/templates/detail.html | 6 ++++++ src/main/resources/templates/edit.html | 19 +++++++++++++++++++ 4 files changed, 43 insertions(+), 3 deletions(-) create mode 100644 src/main/resources/templates/edit.html diff --git a/src/main/java/com/example/devSns/controller/PostController.java b/src/main/java/com/example/devSns/controller/PostController.java index bc9fd9c..ae06df7 100644 --- a/src/main/java/com/example/devSns/controller/PostController.java +++ b/src/main/java/com/example/devSns/controller/PostController.java @@ -35,7 +35,7 @@ public String form(Model model) { @PostMapping public String create(@ModelAttribute PostEntity postEntity) { postService.createPost(postEntity); - return "redirect:/posts"; + return "redirect:/posts"; // 글 생성 후 돌아올 주소 } // HTTP GET /posts/{id} @@ -45,10 +45,25 @@ public String detail(@PathVariable Long id, Model model) { return "detail"; } + // HTTP GET /posts/{id}/edit + @GetMapping("/{id}/edit") + public String editForm(@PathVariable Long id, Model model) { + PostEntity postEntity = postService.getPost(id); + model.addAttribute("post", postEntity); + return "edit"; + } + + // HTTP POST /posts/{id}/update + @PostMapping("/{id}/update") + public String update(@PathVariable Long id, @ModelAttribute PostEntity updatedPost) { + postService.updatePost(id, updatedPost); + return "redirect:/posts/" + id; // 수정 후 돌아올 주소 + } + // HTTP POST /posts/{id}/delete @PostMapping("/{id}/delete") public String delete(@PathVariable Long id) { postService.deletePost(id); - return "redirect:/posts"; + return "redirect:/posts"; // 삭제 후 돌아올 주소 } } \ No newline at end of file diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties index 6f74611..8bef822 100644 --- a/src/main/resources/application.properties +++ b/src/main/resources/application.properties @@ -1,7 +1,7 @@ spring.application.name=devSns # ?? ?? -server.port=8081 +server.port=8080 # H2 ???? DB spring.datasource.url=jdbc:h2:mem:testdb;MODE=MySQL;DATABASE_TO_UPPER=false diff --git a/src/main/resources/templates/detail.html b/src/main/resources/templates/detail.html index 016c58c..bdaeae8 100644 --- a/src/main/resources/templates/detail.html +++ b/src/main/resources/templates/detail.html @@ -8,8 +8,14 @@

내용

+ + +
+ + + \ No newline at end of file diff --git a/src/main/resources/templates/edit.html b/src/main/resources/templates/edit.html new file mode 100644 index 0000000..777a6e3 --- /dev/null +++ b/src/main/resources/templates/edit.html @@ -0,0 +1,19 @@ + + + +

게시글 수정

+ +
+
+

+ +
+

+ + +
+ +
+ 취소 + + \ No newline at end of file From cc40f17205dbb075f4c13a7e4b75e935f5ffb52a Mon Sep 17 00:00:00 2001 From: junyi04 Date: Thu, 13 Nov 2025 14:31:31 +0900 Subject: [PATCH 14/17] =?UTF-8?q?feat:=20=EB=8C=93=EA=B8=80=20=EA=B8=B0?= =?UTF-8?q?=EB=8A=A5=20=EB=A1=9C=EC=A7=81=20=EA=B5=AC=ED=98=84=20=EC=99=84?= =?UTF-8?q?=EB=A3=8C?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- build.gradle | 6 +-- .../com/example/devSns/DevSnsApplication.java | 2 +- .../devSns/controller/CommentController.java | 30 +++++++++++++ .../example/devSns/entity/CommentEntity.java | 38 +++++++++++++++++ .../com/example/devSns/entity/PostEntity.java | 6 +++ .../devSns/repository/CommentRepository.java | 7 ++++ .../devSns/service/CommentService.java | 42 +++++++++++++++++++ src/main/resources/application.properties | 16 +++---- 8 files changed, 133 insertions(+), 14 deletions(-) create mode 100644 src/main/java/com/example/devSns/controller/CommentController.java create mode 100644 src/main/java/com/example/devSns/entity/CommentEntity.java create mode 100644 src/main/java/com/example/devSns/repository/CommentRepository.java create mode 100644 src/main/java/com/example/devSns/service/CommentService.java diff --git a/build.gradle b/build.gradle index c78d56d..de1cb7a 100644 --- a/build.gradle +++ b/build.gradle @@ -10,7 +10,7 @@ description = 'Demo project for Spring Boot' java { toolchain { - languageVersion = JavaLanguageVersion.of(21) + languageVersion = JavaLanguageVersion.of(17) } } @@ -27,8 +27,8 @@ dependencies { implementation 'org.springframework.boot:spring-boot-starter-data-jpa' implementation 'org.springframework.boot:spring-boot-starter-jdbc' implementation 'org.springframework.boot:spring-boot-starter-thymeleaf' - testImplementation 'org.springframework.boot:spring-boot-starter-test' - runtimeOnly 'com.h2database:h2' // 임시 메모리 DB + implementation 'com.mysql:mysql-connector-j:8.2.0' // MySQL + testImplementation 'org.springframework.boot:spring-boot-starter-test' testRuntimeOnly 'org.junit.platform:junit-platform-launcher' } diff --git a/src/main/java/com/example/devSns/DevSnsApplication.java b/src/main/java/com/example/devSns/DevSnsApplication.java index b965724..f1bf185 100644 --- a/src/main/java/com/example/devSns/DevSnsApplication.java +++ b/src/main/java/com/example/devSns/DevSnsApplication.java @@ -10,4 +10,4 @@ public static void main(String[] args) { SpringApplication.run(DevSnsApplication.class, args); } -} +} \ No newline at end of file diff --git a/src/main/java/com/example/devSns/controller/CommentController.java b/src/main/java/com/example/devSns/controller/CommentController.java new file mode 100644 index 0000000..ae11563 --- /dev/null +++ b/src/main/java/com/example/devSns/controller/CommentController.java @@ -0,0 +1,30 @@ +package com.example.devSns.controller; + +import com.example.devSns.entity.CommentEntity; +import com.example.devSns.service.CommentService; +import org.springframework.stereotype.Controller; +import org.springframework.web.bind.annotation.*; + +@Controller +@RequestMapping("/comments") +public class CommentController { + private final CommentService commentService; + + public CommentController(CommentService commentService) { + this.commentService = commentService; + } + + // 댓글 생성 + @PostMapping("/{postId}") + public String createComment(@PathVariable Long postId, @ModelAttribute CommentEntity commentEntity) { + commentService.createComment(postId, commentEntity); + return "redirect:/posts/" + postId; + } + + // 댓글 삭제 + @PostMapping("/{commentId}/delete") + public String deleteComment(@PathVariable Long commentId, @RequestParam Long postId) { + commentService.deleteComment(commentId); + return "redirect:/posts/" + postId; + } +} diff --git a/src/main/java/com/example/devSns/entity/CommentEntity.java b/src/main/java/com/example/devSns/entity/CommentEntity.java new file mode 100644 index 0000000..7497902 --- /dev/null +++ b/src/main/java/com/example/devSns/entity/CommentEntity.java @@ -0,0 +1,38 @@ +package com.example.devSns.entity; + +import jakarta.persistence.*; +import lombok.Getter; +import lombok.Setter; +import java.time.LocalDateTime; + +@Entity +@Getter +@Setter +public class CommentEntity { + @Id + @GeneratedValue(strategy = GenerationType.IDENTITY) + private Long id; + + private String content; + private String username; + private int likes; + + private LocalDateTime createdAt; + private LocalDateTime updatedAt; + + // Post와 N:1 관계 + @ManyToOne(fetch = FetchType.LAZY) + @JoinColumn(name = "post_id") + private PostEntity post; + + @PrePersist + public void onCreate() { + this.createdAt = LocalDateTime.now(); + this.updatedAt = LocalDateTime.now(); + } + + @PreUpdate + public void onUpdate() { + this.updatedAt = LocalDateTime.now(); + } +} diff --git a/src/main/java/com/example/devSns/entity/PostEntity.java b/src/main/java/com/example/devSns/entity/PostEntity.java index ccaad1a..d5c47f0 100644 --- a/src/main/java/com/example/devSns/entity/PostEntity.java +++ b/src/main/java/com/example/devSns/entity/PostEntity.java @@ -5,6 +5,8 @@ import lombok.Setter; import java.time.LocalDateTime; +import java.util.ArrayList; +import java.util.List; @Entity @Getter @@ -22,6 +24,10 @@ public class PostEntity { private LocalDateTime createdAt; private LocalDateTime updatedAt; + // post를 삭제하면 댓글도 같이 삭제 + @OneToMany(mappedBy = "post", cascade = CascadeType.ALL, orphanRemoval = true) + private List comments = new ArrayList<>(); + @PrePersist protected void onCreate() { this.createdAt = LocalDateTime.now(); diff --git a/src/main/java/com/example/devSns/repository/CommentRepository.java b/src/main/java/com/example/devSns/repository/CommentRepository.java new file mode 100644 index 0000000..3bc9d09 --- /dev/null +++ b/src/main/java/com/example/devSns/repository/CommentRepository.java @@ -0,0 +1,7 @@ +package com.example.devSns.repository; + +import com.example.devSns.entity.CommentEntity; +import org.springframework.data.jpa.repository.JpaRepository; + +public interface CommentRepository extends JpaRepository { +} diff --git a/src/main/java/com/example/devSns/service/CommentService.java b/src/main/java/com/example/devSns/service/CommentService.java new file mode 100644 index 0000000..d147852 --- /dev/null +++ b/src/main/java/com/example/devSns/service/CommentService.java @@ -0,0 +1,42 @@ +package com.example.devSns.service; + +import com.example.devSns.entity.CommentEntity; +import com.example.devSns.entity.PostEntity; +import com.example.devSns.repository.CommentRepository; +import com.example.devSns.repository.PostRepository; +import org.springframework.stereotype.Service; +import org.springframework.transaction.annotation.Transactional; + +import java.util.List; + +@Service +@Transactional(readOnly = true) +public class CommentService { + private final CommentRepository commentRepository; + private final PostRepository postRepository; + + public CommentService(CommentRepository commentRepository, PostRepository postRepository) { + this.commentRepository = commentRepository; + this.postRepository = postRepository; + } + + // 특정 게시글 댓글 조회 + public List getCommentsByPost(Long postId) { + PostEntity postEntity = postRepository.findById(postId).orElseThrow(); + return postEntity.getComments(); + } + + // 댓글 생성 + @Transactional + public CommentEntity createComment(Long postId, CommentEntity comment) { + PostEntity postEntity = postRepository.findById(postId).orElseThrow(); + comment.setPost(postEntity); + return commentRepository.save(comment); + } + + // 댓글 삭제 + @Transactional + public void deleteComment(Long id) { + commentRepository.deleteById(id); + } +} diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties index 8bef822..e782abf 100644 --- a/src/main/resources/application.properties +++ b/src/main/resources/application.properties @@ -3,21 +3,17 @@ spring.application.name=devSns # ?? ?? server.port=8080 -# H2 ???? DB -spring.datasource.url=jdbc:h2:mem:testdb;MODE=MySQL;DATABASE_TO_UPPER=false -spring.datasource.driver-class-name=org.h2.Driver -spring.datasource.username=sa -spring.datasource.password= +# MySQL +spring.datasource.url=jdbc:mysql://localhost:3306/devSns?serverTimezone=Asia/Seoul&characterEncoding=UTF-8 +spring.datasource.username=root +spring.datasource.password=as112525@ +spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver # JPA spring.jpa.hibernate.ddl-auto=update spring.jpa.show-sql=true spring.jpa.properties.hibernate.format_sql=true -# H2 ?? -spring.h2.console.enabled=true -spring.h2.console.path=/h2-console - -# Thymeleaf(??? ??? ?? ?) +# Thymeleaf spring.thymeleaf.cache=false From f955163528b9a96d22d30b6d78680a90796a2f36 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Thu, 13 Nov 2025 14:40:32 +0900 Subject: [PATCH 15/17] =?UTF-8?q?feat:=20detail=20=ED=99=94=EB=A9=B4?= =?UTF-8?q?=EC=97=90=20=EB=8C=93=EA=B8=80=20=EA=B8=B0=EB=8A=A5=20=EC=B6=94?= =?UTF-8?q?=EA=B0=80?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- src/main/resources/templates/detail.html | 41 ++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/src/main/resources/templates/detail.html b/src/main/resources/templates/detail.html index bdaeae8..631ec47 100644 --- a/src/main/resources/templates/detail.html +++ b/src/main/resources/templates/detail.html @@ -17,5 +17,46 @@

내용

+ +
+

댓글

+ +
+

댓글이 없습니다.

+
+ +
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    +

    +

    + + +
    + + +
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    +
    • +
+ +
+ +

댓글 작성하기

+ +
+

+ 작성자: + +

+

+ 내용:
+ +

+ + +
+ \ No newline at end of file From a06835e9409b25b0dab4574cc063a55529c67672 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Thu, 13 Nov 2025 15:48:26 +0900 Subject: [PATCH 16/17] =?UTF-8?q?refactor:=20Entity=EB=A5=BC=20DTO=20?= =?UTF-8?q?=EC=93=B0=EB=8A=94=20=EB=B0=A9=ED=96=A5=EC=9C=BC=EB=A1=9C=20?= =?UTF-8?q?=EC=88=98=EC=A0=95?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../devSns/controller/CommentController.java | 5 +-- .../example/devSns/dto/CommentRequest.java | 13 ++++++++ .../example/devSns/dto/CommentResponse.java | 20 ++++++++++++ .../example/devSns/entity/CommentEntity.java | 23 +++++++++++--- .../com/example/devSns/entity/PostEntity.java | 2 +- .../devSns/service/CommentService.java | 31 ++++++++++++++++--- src/main/resources/templates/detail.html | 3 +- 7 files changed, 83 insertions(+), 14 deletions(-) create mode 100644 src/main/java/com/example/devSns/dto/CommentRequest.java create mode 100644 src/main/java/com/example/devSns/dto/CommentResponse.java diff --git a/src/main/java/com/example/devSns/controller/CommentController.java b/src/main/java/com/example/devSns/controller/CommentController.java index ae11563..66874de 100644 --- a/src/main/java/com/example/devSns/controller/CommentController.java +++ b/src/main/java/com/example/devSns/controller/CommentController.java @@ -1,5 +1,6 @@ package com.example.devSns.controller; +import com.example.devSns.dto.CommentRequest; import com.example.devSns.entity.CommentEntity; import com.example.devSns.service.CommentService; import org.springframework.stereotype.Controller; @@ -16,8 +17,8 @@ public CommentController(CommentService commentService) { // 댓글 생성 @PostMapping("/{postId}") - public String createComment(@PathVariable Long postId, @ModelAttribute CommentEntity commentEntity) { - commentService.createComment(postId, commentEntity); + public String createComment(@PathVariable Long postId, @ModelAttribute CommentRequest request) { + commentService.createComment(postId, request); return "redirect:/posts/" + postId; } diff --git a/src/main/java/com/example/devSns/dto/CommentRequest.java b/src/main/java/com/example/devSns/dto/CommentRequest.java new file mode 100644 index 0000000..93829ab --- /dev/null +++ b/src/main/java/com/example/devSns/dto/CommentRequest.java @@ -0,0 +1,13 @@ +package com.example.devSns.dto; + +import lombok.Getter; +import lombok.Setter; + +@Getter +@Setter +public class CommentRequest { + private String username; + private String content; +} + +// Controller는 CommentEntity를 직접 받지 않고 CommentRequest만 받게 됨 diff --git a/src/main/java/com/example/devSns/dto/CommentResponse.java b/src/main/java/com/example/devSns/dto/CommentResponse.java new file mode 100644 index 0000000..917576b --- /dev/null +++ b/src/main/java/com/example/devSns/dto/CommentResponse.java @@ -0,0 +1,20 @@ +package com.example.devSns.dto; + +import lombok.Getter; + +@Getter +public class CommentResponse { + private final Long id; + private final String username; + private final String content; + private final String createdAt; + + public CommentResponse(Long id, String username, String content, String createdAt) { + this.id = id; + this.username = username; + this.content = content; + this.createdAt = createdAt; + } +} + +// Entity를 외부로 그대로 내보내지 않고 DTO로 가공해서 반환 diff --git a/src/main/java/com/example/devSns/entity/CommentEntity.java b/src/main/java/com/example/devSns/entity/CommentEntity.java index 7497902..07d93eb 100644 --- a/src/main/java/com/example/devSns/entity/CommentEntity.java +++ b/src/main/java/com/example/devSns/entity/CommentEntity.java @@ -2,12 +2,12 @@ import jakarta.persistence.*; import lombok.Getter; -import lombok.Setter; + import java.time.LocalDateTime; +// DTO를 사용하고 Setter를 삭제 (안전) @Entity @Getter -@Setter public class CommentEntity { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @@ -15,7 +15,6 @@ public class CommentEntity { private String content; private String username; - private int likes; private LocalDateTime createdAt; private LocalDateTime updatedAt; @@ -23,7 +22,23 @@ public class CommentEntity { // Post와 N:1 관계 @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "post_id") - private PostEntity post; + private PostEntity postEntity; + + // JPA 기본 생성자 + protected CommentEntity() {} + + // 정적 생성 메서드 > 엔터티 변경은 오직 메서드로 + public static CommentEntity create(PostEntity postEntity, String username, String content) { + CommentEntity comment = new CommentEntity(); + comment.postEntity = postEntity; + comment.username = username; + comment.content = content; + return comment; + } + + public void updateContent(String content) { + this.content = content; + } @PrePersist public void onCreate() { diff --git a/src/main/java/com/example/devSns/entity/PostEntity.java b/src/main/java/com/example/devSns/entity/PostEntity.java index d5c47f0..9a71dfc 100644 --- a/src/main/java/com/example/devSns/entity/PostEntity.java +++ b/src/main/java/com/example/devSns/entity/PostEntity.java @@ -25,7 +25,7 @@ public class PostEntity { private LocalDateTime updatedAt; // post를 삭제하면 댓글도 같이 삭제 - @OneToMany(mappedBy = "post", cascade = CascadeType.ALL, orphanRemoval = true) + @OneToMany(mappedBy = "postEntity", cascade = CascadeType.ALL, orphanRemoval = true) private List comments = new ArrayList<>(); @PrePersist diff --git a/src/main/java/com/example/devSns/service/CommentService.java b/src/main/java/com/example/devSns/service/CommentService.java index d147852..0246c4e 100644 --- a/src/main/java/com/example/devSns/service/CommentService.java +++ b/src/main/java/com/example/devSns/service/CommentService.java @@ -1,5 +1,7 @@ package com.example.devSns.service; +import com.example.devSns.dto.CommentRequest; +import com.example.devSns.dto.CommentResponse; import com.example.devSns.entity.CommentEntity; import com.example.devSns.entity.PostEntity; import com.example.devSns.repository.CommentRepository; @@ -21,17 +23,36 @@ public CommentService(CommentRepository commentRepository, PostRepository postRe } // 특정 게시글 댓글 조회 - public List getCommentsByPost(Long postId) { + public List getCommentsByPost(Long postId) { PostEntity postEntity = postRepository.findById(postId).orElseThrow(); - return postEntity.getComments(); + return postEntity.getComments().stream() + .map(comment -> new CommentResponse( + comment.getId(), + comment.getUsername(), + comment.getContent(), + comment.getCreatedAt().toString() + )) + .toList(); } // 댓글 생성 @Transactional - public CommentEntity createComment(Long postId, CommentEntity comment) { + public CommentResponse createComment(Long postId, CommentRequest request) { PostEntity postEntity = postRepository.findById(postId).orElseThrow(); - comment.setPost(postEntity); - return commentRepository.save(comment); + CommentEntity comment = CommentEntity.create( + postEntity, + request.getUsername(), + request.getContent() + ); + + commentRepository.save(comment); + + return new CommentResponse( + comment.getId(), + comment.getUsername(), + comment.getContent(), + comment.getCreatedAt().toString() + ); } // 댓글 삭제 diff --git a/src/main/resources/templates/detail.html b/src/main/resources/templates/detail.html index 631ec47..cdbd81b 100644 --- a/src/main/resources/templates/detail.html +++ b/src/main/resources/templates/detail.html @@ -29,9 +29,8 @@

댓글

  • -

    +

    -
    From f090e611493c209bc005195c62ff0b84c8126cb6 Mon Sep 17 00:00:00 2001 From: junyi04 Date: Thu, 13 Nov 2025 15:56:17 +0900 Subject: [PATCH 17/17] =?UTF-8?q?feat:=20week-2=20=EB=B8=8C=EB=9E=9C?= =?UTF-8?q?=EC=B9=98?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- src/main/resources/templates/detail.html | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/main/resources/templates/detail.html b/src/main/resources/templates/detail.html index cdbd81b..a867bd4 100644 --- a/src/main/resources/templates/detail.html +++ b/src/main/resources/templates/detail.html @@ -29,7 +29,7 @@

    댓글

  • -

    +

    작성일: