\ubcf8 \uac15\uc88c\ub294 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub97c \ud65c\uc6a9\ud558\uc5ec \uac04\ub2e8\ud55c \ube14\ub85c\uadf8\ub97c \uc81c\uc791\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \ub2e4\ub8f9\ub2c8\ub2e4. \uc6b0\ub9ac\ub294 \ube14\ub85c\uadf8 \uac8c\uc2dc\ubb3c CRUD(Create, Read, Update, Delete) \uae30\ub2a5\uc744 \uad6c\ud604\ud560 \uac83\uc785\ub2c8\ub2e4. \ubcf8 \uac15\uc88c\uc5d0\uc11c\ub294 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\uc758 \uae30\ubcf8 \uc124\uc815\ubd80\ud130 \uc2dc\uc791\ud558\uc5ec \uc11c\ube44\uc2a4 \uba54\uc11c\ub4dc \ucf54\ub4dc \uc791\uc131\uae4c\uc9c0 \ub2e8\uacc4\ubcc4\ub85c \uc9c4\ud589\ud560 \uac83\uc785\ub2c8\ub2e4.<\/p>\n
\uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub294 \uc2a4\ud504\ub9c1 \ud504\ub808\uc784\uc6cc\ud06c\uc758 \uc124\uc815\uc744 \uac04\uc18c\ud654\ud558\uace0, \ub3c5\ub9bd\uc801\uc778 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc27d\uac8c \ub9cc\ub4e4 \uc218 \uc788\ub3c4\ub85d \ub3c4\uc640\uc8fc\ub294 \ud504\ub808\uc784\uc6cc\ud06c\uc785\ub2c8\ub2e4. \uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub294 \ub2e4\uc591\ud55c \uc2a4\ud0c0\ud130 \uc758\uc874\uc131\uc744 \uc81c\uacf5\ud558\uba70, \ube60\ub978 \uac1c\ubc1c\uacfc \ubc30\ud3ec\ub97c \uc9c0\uc6d0\ud569\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec RESTful API\ub97c \ub9cc\ub4e4\uace0, CRUD \uae30\ub2a5\uc744 \uad6c\ud604\ud560 \uac83\uc785\ub2c8\ub2e4.<\/p>\n
\uc2a4\ud504\ub9c1 \ubd80\ud2b8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uac1c\ubc1c\ud558\uae30 \uc704\ud574\uc11c\ub294 Java Development Kit (JDK)\uc640 \ud1b5\ud569 \uac1c\ubc1c \ud658\uacbd(IDE)\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. IntelliJ IDEA\ub098 Eclipse\ub97c \ucd94\ucc9c\ud558\uba70, JDK 11 \uc774\uc0c1\uc758 \ubc84\uc804\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n
https:\/\/spring.io\/projects\/spring-boot<\/code><\/pre>\n2.1. \ud504\ub85c\uc81d\ud2b8 \uc0dd\uc131<\/h3>\n
\uc2a4\ud504\ub9c1 \ubd80\ud2b8 \ud504\ub85c\uc81d\ud2b8\ub97c \uc0dd\uc131\ud558\uae30 \uc704\ud574 Spring Initializr\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uc758 \uc124\uc815\uc744 \uc0ac\uc6a9\ud574 \uc8fc\uc138\uc694:<\/p>\n
\n- Project: Maven Project<\/li>\n
- Language: Java<\/li>\n
- Spring Boot: 2.5.x (\ucd5c\uc2e0 \uc548\uc815\ud654 \ubc84\uc804 \uc120\ud0dd)<\/li>\n
- Group: com.example<\/li>\n
- Artifact: blog<\/li>\n
- Dependencies: Spring Web, Spring Data JPA, H2 Database (\ub610\ub294 MySQL)<\/li>\n<\/ul>\n
2.2. \ud504\ub85c\uc81d\ud2b8 \uad6c\uc870<\/h3>\n
\uc2a4\ud504\ub9c1 \ubd80\ud2b8 \ud504\ub85c\uc81d\ud2b8\uac00 \uc0dd\uc131\ub418\uba74 \uc544\ub798\uc640 \uac19\uc740 \uae30\ubcf8 \uad6c\uc870\ub97c \uac00\uc9d1\ub2c8\ub2e4:<\/p>\n
\nblog\n\u251c\u2500\u2500 src\n\u2502 \u251c\u2500\u2500 main\n\u2502 \u2502 \u251c\u2500\u2500 java\n\u2502 \u2502 \u2502 \u2514\u2500\u2500 com\n\u2502 \u2502 \u2502 \u2514\u2500\u2500 example\n\u2502 \u2502 \u2502 \u2514\u2500\u2500 blog\n\u2502 \u2502 \u2502 \u251c\u2500\u2500 BlogApplication.java\n\u2502 \u2502 \u2502 \u251c\u2500\u2500 controller\n\u2502 \u2502 \u2502 \u251c\u2500\u2500 model\n\u2502 \u2502 \u2502 \u2514\u2500\u2500 repository\n\u2502 \u2502 \u2514\u2500\u2500 resources\n\u2502 \u2502 \u251c\u2500\u2500 application.properties\n\u2502 \u2502 \u2514\u2500\u2500 static\n\u2502 \u2514\u2500\u2500 test\n\u2514\u2500\u2500 pom.xml\n<\/code><\/pre>\n3. \ube14\ub85c\uadf8 \ubaa8\ub378 \ud074\ub798\uc2a4 \uc791\uc131<\/h2>\n
\ube14\ub85c\uadf8 \uac8c\uc2dc\ubb3c\uc744 \ud45c\ud604\ud560 \uc218 \uc788\ub294 \ubaa8\ub378 \ud074\ub798\uc2a4\ub97c \uc791\uc131\ud569\ub2c8\ub2e4. \uc544\ub798\ub294 \uac8c\uc2dc\ubb3c(Post) \ubaa8\ub378 \ud074\ub798\uc2a4\uc758 \uc608\uc81c\uc785\ub2c8\ub2e4:<\/p>\n
package com.example.blog.model;\n\nimport javax.persistence.Entity;\nimport javax.persistence.GeneratedValue;\nimport javax.persistence.GenerationType;\nimport javax.persistence.Id;\nimport javax.persistence.Column;\n\n@Entity\npublic class Post {\n @Id\n @GeneratedValue(strategy = GenerationType.IDENTITY)\n private Long id;\n\n @Column(nullable = false)\n private String title;\n\n @Column(nullable = false, length = 1000)\n private String content;\n\n \/\/ \uc0dd\uc131\uc790, getter, setter \uc0dd\ub7b5\n}\n<\/code><\/pre>\n4. \ub9ac\ud3ec\uc9c0\ud1a0\ub9ac \uc778\ud130\ud398\uc774\uc2a4 \uc791\uc131<\/h2>\n
\ub370\uc774\ud130\ubca0\uc774\uc2a4\uc640\uc758 \uc0c1\ud638\uc791\uc6a9\uc744 \uc704\ud574 \ub9ac\ud3ec\uc9c0\ud1a0\ub9ac \ud074\ub798\uc2a4\ub97c \uc791\uc131\ud569\ub2c8\ub2e4. Spring Data JPA\ub97c \uc0ac\uc6a9\ud560 \uac83\uc774\ubbc0\ub85c \uac04\ub2e8\ud558\uac8c \uc778\ud130\ud398\uc774\uc2a4\ub9cc \uc815\uc758\ud558\uba74 \ub429\ub2c8\ub2e4:<\/p>\n
package com.example.blog.repository;\n\nimport com.example.blog.model.Post;\nimport org.springframework.data.jpa.repository.JpaRepository;\n\npublic interface PostRepository extends JpaRepository<Post, Long> {\n}\n<\/code><\/pre>\n5. \uc11c\ube44\uc2a4 \ud074\ub798\uc2a4 \uc791\uc131<\/h2>\n
\ube44\uc988\ub2c8\uc2a4 \ub85c\uc9c1\uc744 \ucc98\ub9ac\ud560 \uc11c\ube44\uc2a4 \ud074\ub798\uc2a4\ub97c \uc791\uc131\ud569\ub2c8\ub2e4. \uc11c\ube44\uc2a4 \ud074\ub798\uc2a4\uc5d0\uc11c\ub294 CRUD \uae30\ub2a5\uc744 \uc704\ud55c \uba54\uc11c\ub4dc\ub97c \uad6c\ud604\ud569\ub2c8\ub2e4:<\/p>\n
package com.example.blog.service;\n\nimport com.example.blog.model.Post;\nimport com.example.blog.repository.PostRepository;\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.stereotype.Service;\n\nimport java.util.List;\nimport java.util.Optional;\n\n@Service\npublic class PostService {\n @Autowired\n private PostRepository postRepository;\n\n \/\/ \uac8c\uc2dc\ubb3c \ubaa9\ub85d \uc870\ud68c\n public List<Post> findAll() {\n return postRepository.findAll();\n }\n\n \/\/ \uac8c\uc2dc\ubb3c \ucd94\uac00\n public Post save(Post post) {\n return postRepository.save(post);\n }\n\n \/\/ \uac8c\uc2dc\ubb3c \uc870\ud68c\n public Optional<Post> findById(Long id) {\n return postRepository.findById(id);\n }\n\n \/\/ \uac8c\uc2dc\ubb3c \uc218\uc815\n public Post update(Long id, Post postDetails) {\n Post post = postRepository.findById(id).orElseThrow(() -> new RuntimeException(\"\uac8c\uc2dc\ubb3c\uc744 \ucc3e\uc744 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.\"));\n post.setTitle(postDetails.getTitle());\n post.setContent(postDetails.getContent());\n return postRepository.save(post);\n }\n\n \/\/ \uac8c\uc2dc\ubb3c \uc0ad\uc81c\n public void delete(Long id) {\n postRepository.deleteById(id);\n }\n}\n<\/code><\/pre>\n6. \ucee8\ud2b8\ub864\ub7ec \ud074\ub798\uc2a4 \uc791\uc131<\/h2>\n
\ud074\ub77c\uc774\uc5b8\ud2b8\uc758 \uc694\uccad\uc744 \ucc98\ub9ac\ud558\uae30 \uc704\ud55c REST \ucee8\ud2b8\ub864\ub7ec \ud074\ub798\uc2a4\ub97c \uc791\uc131\ud569\ub2c8\ub2e4. \uc774 \ud074\ub798\uc2a4\ub294 HTTP \uc694\uccad\uc744 \ubc1b\uc544 \uc801\uc808\ud55c \uc11c\ube44\uc2a4 \uba54\uc11c\ub4dc\ub97c \ud638\ucd9c\ud569\ub2c8\ub2e4:<\/p>\n
package com.example.blog.controller;\n\nimport com.example.blog.model.Post;\nimport com.example.blog.service.PostService;\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.http.ResponseEntity;\nimport org.springframework.web.bind.annotation.*;\n\nimport java.util.List;\n\n@RestController\n@RequestMapping(\"\/api\/posts\")\npublic class PostController {\n @Autowired\n private PostService postService;\n\n \/\/ \uac8c\uc2dc\ubb3c \ubaa9\ub85d \uc870\ud68c\n @GetMapping\n public List<Post> getAllPosts() {\n return postService.findAll();\n }\n\n \/\/ \uac8c\uc2dc\ubb3c \ucd94\uac00\n @PostMapping\n public Post createPost(@RequestBody Post post) {\n return postService.save(post);\n }\n\n \/\/ \uac8c\uc2dc\ubb3c \uc870\ud68c\n @GetMapping(\"\/{id}\")\n public ResponseEntity<Post> getPostById(@PathVariable Long id) {\n return postService.findById(id)\n .map(ResponseEntity::ok)\n .orElse(ResponseEntity.notFound().build());\n }\n\n \/\/ \uac8c\uc2dc\ubb3c \uc218\uc815\n @PutMapping(\"\/{id}\")\n public ResponseEntity<Post> updatePost(@PathVariable Long id, @RequestBody Post postDetails) {\n try {\n Post updatedPost = postService.update(id, postDetails);\n return ResponseEntity.ok(updatedPost);\n } catch (RuntimeException e) {\n return ResponseEntity.notFound().build();\n }\n }\n\n \/\/ \uac8c\uc2dc\ubb3c \uc0ad\uc81c\n @DeleteMapping(\"\/{id}\")\n public ResponseEntity<Void> deletePost(@PathVariable Long id) {\n postService.delete(id);\n return ResponseEntity.noContent().build();\n }\n}\n<\/code><\/pre>\n7. \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc124\uc815<\/h2>\n
application.properties \ud30c\uc77c\uc5d0\uc11c \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc124\uc815\uc744 \ucd94\uac00\ud569\ub2c8\ub2e4. H2 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub97c \uc0ac\uc6a9\ud560 \uacbd\uc6b0 \uc544\ub798\uc640 \uac19\uc774 \uc124\uc815\ud569\ub2c8\ub2e4:<\/p>\n
\nspring.h2.console.enabled=true\nspring.datasource.url=jdbc:h2:mem:testdb\nspring.datasource.driverClassName=org.h2.Driver\nspring.datasource.username=sa\nspring.datasource.password=\nspring.jpa.database-platform=org.hibernate.dialect.H2Dialect\n<\/code><\/pre>\n8. \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc2e4\ud589<\/h2>\n
\ubaa8\ub4e0 \uc124\uc815\uc774 \uc644\ub8cc\ub418\uba74 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc2e4\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. IDE\ub97c \uc0ac\uc6a9\ud558\uc5ec BlogApplication.java<\/code> \ud074\ub798\uc2a4\ub97c \uc2e4\ud589\ud558\uac70\ub098 \ud130\ubbf8\ub110\uc5d0\uc11c \uc544\ub798\uc758 \uba85\ub839\uc5b4\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\nmvn spring-boot:run<\/code><\/pre>\n9. Postman\uc744 \ud1b5\ud55c API \ud14c\uc2a4\ud2b8<\/h2>\n
\uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \uc815\uc0c1\uc801\uc73c\ub85c \uc2e4\ud589\ub418\uba74 Postman\uc744 \uc0ac\uc6a9\ud558\uc5ec API\ub97c \ud14c\uc2a4\ud2b8\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc544\ub798\ub294 \uc5ec\ub7ec \uac00\uc9c0 HTTP \uc694\uccad\uc744 \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc785\ub2c8\ub2e4:<\/p>\n
\n- GET \/api\/posts – \ubaa8\ub4e0 \uac8c\uc2dc\ubb3c \uc870\ud68c<\/li>\n
- POST \/api\/posts – \uac8c\uc2dc\ubb3c \ucd94\uac00<\/li>\n
- GET \/api\/posts\/{id} – \ud2b9\uc815 \uac8c\uc2dc\ubb3c \uc870\ud68c<\/li>\n
- PUT \/api\/posts\/{id} – \uac8c\uc2dc\ubb3c \uc218\uc815<\/li>\n
- DELETE \/api\/posts\/{id} – \uac8c\uc2dc\ubb3c \uc0ad\uc81c<\/li>\n<\/ul>\n
\uacb0\ub860<\/h2>\n
\uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec \ube14\ub85c\uadf8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \ubc31\uc5d4\ub4dc\ub97c \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc124\uba85\ud558\uc600\uc2b5\ub2c8\ub2e4. CRUD \uae30\ub2a5\uc744 \uc81c\uacf5\ud558\ub294 \uc11c\ube44\uc2a4 \ubc0f REST API\ub97c \uad6c\ucd95\ud558\uc5ec \uc0ac\uc6a9\uc790\uac00 \ube14\ub85c\uadf8 \uac8c\uc2dc\ubb3c\uc744 \uad00\ub9ac\ud560 \uc218 \uc788\ub3c4\ub85d \ud558\uc600\uc2b5\ub2c8\ub2e4. \uc774 \uac15\uc88c\ub97c \ud1b5\ud574 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\uc758 \uae30\ucd08\ub97c \uc774\ud574\ud558\uace0, \uc2e4\uc81c \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uac1c\ubc1c\uc5d0 \ud65c\uc6a9\ud560 \uc218 \uc788\ub294 \uae30\ucd08\ub97c \ub2e4\uc9c0\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n
\ucd94\uac00 \ud559\uc2b5 \uc790\ub8cc<\/h2>\n