게시물 CRUD 기능구현 [완료]

build.gradle

@@ -25,6 +25,12 @@ repositories {
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-mustache'
 	implementation 'org.springframework.boot:spring-boot-starter-web'
+
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'com.h2database:h2'
+
+	testImplementation 'junit:junit:4.13.1'
+	testImplementation 'junit:junit:4.13.1'
 	compileOnly 'org.projectlombok:lombok'
 	annotationProcessor 'org.projectlombok:lombok'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'

src/main/java/com/book/book_aws/BookAwsApplication.java

@@ -2,7 +2,9 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
 
+@EnableJpaAuditing // JPA Auditing 활성화
 @SpringBootApplication
 public class BookAwsApplication {
 

src/main/java/com/book/book_aws/controller/HelloController.java

@@ -0,0 +1,15 @@
+package com.book.book_aws.controller;
+
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.service.annotation.GetExchange;
+
+@RestController
+public class HelloController {
+
+    @GetMapping("/hello")
+    public String hello(){
+        return "hello";
+    }
+}

src/main/java/com/book/book_aws/controller/IndexController.java

@@ -0,0 +1,35 @@
+package com.book.book_aws.controller;
+
+import com.book.book_aws.dto.PostsResponseDto;
+import com.book.book_aws.service.PostsService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+
+@RequiredArgsConstructor
+@Controller
+public class IndexController {
+
+    private final PostsService postsService;
+
+    @GetMapping("/")
+    public String index(Model model) {
+        model.addAttribute("posts", postsService.findAllDesc());
+        return "index";
+    }
+
+    @GetMapping("/posts/save")
+    public String postsSave() {
+        return "posts-save";
+    }
+
+    @GetMapping("/posts/update/{id}")
+    public String postsUpdate(@PathVariable Long id, Model model) {
+        PostsResponseDto dto = postsService.findById(id);
+        model.addAttribute("post", dto);
+
+        return "posts-update";
+    }
+}

src/main/java/com/book/book_aws/controller/PostsApiController.java

@@ -0,0 +1,37 @@
+package com.book.book_aws.controller;
+
+import com.book.book_aws.dto.PostsResponseDto;
+import com.book.book_aws.dto.PostsSaveRequestDto;
+import com.book.book_aws.dto.PostsUpdateRequestDto;
+import com.book.book_aws.service.PostsService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.*;
+
+@RequiredArgsConstructor
+@RestController
+public class PostsApiController {
+
+    private final PostsService postsService;
+
+    @PostMapping("/api/v1/posts")
+    public Long save(@RequestBody PostsSaveRequestDto requestDto) {
+        return postsService.save(requestDto);
+    }
+
+    @PutMapping("/api/v1/posts/{id}")
+    public Long update(@PathVariable Long id, @RequestBody PostsUpdateRequestDto requestDto) {
+        return postsService.update(id, requestDto);
+    }
+
+    @GetMapping("/api/v1/posts/{id}")
+    public PostsResponseDto findById(@PathVariable Long id) {
+        return postsService.findById(id);
+    }
+
+    @DeleteMapping("/api/v1/posts/{id}")
+    public Long delete(@PathVariable Long id) {
+        postsService.delete(id);
+        return id;
+    }
+
+}

src/main/java/com/book/book_aws/domain/BaseTimeEntity.java

@@ -0,0 +1,23 @@
+package com.book.book_aws.domain;
+
+import jakarta.persistence.EntityListeners;
+import jakarta.persistence.MappedSuperclass;
+import lombok.Getter;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import java.time.LocalDateTime;
+
+@Getter
+@MappedSuperclass
+@EntityListeners(AuditingEntityListener.class)
+public abstract class BaseTimeEntity {
+
+    @CreatedDate
+    private LocalDateTime createdDate;
+
+    @LastModifiedDate
+    private LocalDateTime modifiedDate;
+
+}

src/main/java/com/book/book_aws/domain/posts/Posts.java

@@ -0,0 +1,50 @@
+package com.book.book_aws.domain.posts;
+
+import com.book.book_aws.domain.BaseTimeEntity;
+import jakarta.persistence.*;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+@Entity
+public class Posts extends BaseTimeEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY) // 오토 인크리션
+    private Long id;
+
+    @Column(length = 500, nullable = false) // 사용하지 않아도 되지만
+    private String title;
+
+    @Column(columnDefinition = "TEXT", nullable = false)
+    private String content;
+
+    private String author;
+
+    @Builder
+    public Posts(String title, String content, String author) {
+        this.title = title;
+        this.content = content;
+        this.author = author;
+    }
+
+    public void update(String title, String content) {
+        this.title = title;
+        this.content = content;
+    }
+
+}
+
+
+
+
+
+
+
+
+
+
+
+

src/main/java/com/book/book_aws/domain/posts/PostsRepository.java

@@ -0,0 +1,13 @@
+package com.book.book_aws.domain.posts;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+
+import java.util.List;
+
+public interface PostsRepository extends JpaRepository<Posts, Long> {
+
+    @Query("SELECT p FROM Posts p ORDER BY p.id DESC")
+    List<Posts> findAllDesc();
+
+}

src/main/java/com/book/book_aws/dto/HelloResponseDto.java

@@ -0,0 +1,13 @@
+package com.book.book_aws.dto;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@RequiredArgsConstructor
+public class HelloResponseDto {
+
+    private final String name;
+    private final int amount;
+
+}

src/main/java/com/book/book_aws/dto/PostsListResponseDto.java

@@ -0,0 +1,21 @@
+package com.book.book_aws.dto;
+
+import com.book.book_aws.domain.posts.Posts;
+import lombok.Getter;
+
+import java.time.LocalDateTime;
+
+@Getter
+public class PostsListResponseDto {
+    private Long id;
+    private String title;
+    private String author;
+    private LocalDateTime modifiedDate;
+
+    public PostsListResponseDto(Posts entity) {
+        this.id = entity.getId();
+        this.title = entity.getTitle();
+        this.author = entity.getAuthor();
+        this.modifiedDate = entity.getModifiedDate();
+    }
+}

src/main/java/com/book/book_aws/dto/PostsResponseDto.java

@@ -0,0 +1,20 @@
+package com.book.book_aws.dto;
+
+import com.book.book_aws.domain.posts.Posts;
+import lombok.Getter;
+
+@Getter
+public class PostsResponseDto {
+
+    private Long id;
+    private String title;
+    private String content;
+    private String author;
+
+    public PostsResponseDto(Posts entity) {
+        this.id = entity.getId();
+        this.title = entity.getTitle();
+        this.content = entity.getContent();
+        this.author = entity.getAuthor();
+    }
+}

src/main/java/com/book/book_aws/dto/PostsSaveRequestDto.java

@@ -0,0 +1,29 @@
+package com.book.book_aws.dto;
+
+import com.book.book_aws.domain.posts.Posts;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class PostsSaveRequestDto {
+    private String title;
+    private String content;
+    private String author;
+
+    @Builder
+    public PostsSaveRequestDto(String title, String content, String author) {
+        this.title = title;
+        this.content = content;
+        this.author = author;
+    }
+
+    public Posts toEntity() {
+        return Posts.builder()
+                .title(title)
+                .content(content)
+                .author(author)
+                .build();
+    }
+}

src/main/java/com/book/book_aws/dto/PostsUpdateRequestDto.java

@@ -0,0 +1,20 @@
+package com.book.book_aws.dto;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class PostsUpdateRequestDto {
+    private String title;
+    private String content;
+
+
+    @Builder
+    public PostsUpdateRequestDto(String title, String content) {
+        this.title = title;
+        this.content = content;
+    }
+
+}

src/main/java/com/book/book_aws/service/PostsService.java

@@ -0,0 +1,64 @@
+package com.book.book_aws.service;
+
+import com.book.book_aws.domain.posts.Posts;
+import com.book.book_aws.domain.posts.PostsRepository;
+import com.book.book_aws.dto.PostsListResponseDto;
+import com.book.book_aws.dto.PostsResponseDto;
+import com.book.book_aws.dto.PostsSaveRequestDto;
+import com.book.book_aws.dto.PostsUpdateRequestDto;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@RequiredArgsConstructor
+@Service
+public class PostsService {
+
+    private final PostsRepository postsRepository;
+
+    @Transactional
+    public Long save(PostsSaveRequestDto requestDto) {
+        return postsRepository.save(requestDto.toEntity()).getId();
+    }
+
+    @Transactional
+    public Long update(Long id, PostsUpdateRequestDto requestDto) {
+        Posts posts = postsRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("해당 사용자가 없습니다. id=" + id));
+
+        posts.update(requestDto.getTitle(), requestDto.getContent());
+
+        return id;
+    }
+
+
+    @Transactional(readOnly = true)
+    public PostsResponseDto findById(Long id) {
+        Posts entity = postsRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("해당 사용자가 없습니다. id=" + id));
+
+        return new PostsResponseDto(entity);
+    }
+
+
+    @Transactional
+    public void delete (Long id) {
+        Posts posts = postsRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("해당 게시글이 없습니다. id=" + id));
+
+        postsRepository.delete(posts);
+    }
+
+    @Transactional(readOnly = true)
+    public List<PostsListResponseDto> findAllDesc() {
+        return postsRepository.findAllDesc().stream()
+                .map(PostsListResponseDto::new)
+                .collect(Collectors.toList());
+    }
+
+
+
+}

src/main/resources/application.properties

@@ -1 +1,7 @@
+spring.jpa.show-sql=true
+#spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
+spring.h2.console.enabled=true
+spring.h2.console.path=/h2-console
+spring.datasource.url=jdbc:h2:mem:testdb
 
+server.servlet.encoding.force-response=true