\uc2a4\ud504\ub9c1 \ubd80\ud2b8(Spring Boot)\ub294 Java \uae30\ubc18\uc758 \uc6f9 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \ube60\ub974\uace0 \uac04\ud3b8\ud558\uac8c \uac1c\ubc1c\ud560 \uc218 \uc788\ub294 \ud504\ub808\uc784\uc6cc\ud06c\uc785\ub2c8\ub2e4. \uc774 \uac15\uc88c\uc5d0\uc11c\ub294 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubc31\uc5d4\ub4dc \uc11c\ubc84\ub97c \uad6c\ucd95\ud558\uace0, \ube14\ub85c\uadf8 \uc81c\uc791 \uc608\uc81c\ub97c \ud1b5\ud574 RESTful API\ub97c \uad6c\ud604\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \ub9c8\uc9c0\ub9c9\uc73c\ub85c API \uc2e4\ud589 \ud14c\uc2a4\ud2b8 \ubc29\ubc95\uc5d0 \ub300\ud574\uc11c\ub3c4 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub294 \uc2a4\ud504\ub9c1 \ud504\ub808\uc784\uc6cc\ud06c\ub97c \ubc14\ud0d5\uc73c\ub85c \uac04\ud3b8\ud558\uace0 \ube60\ub974\uac8c \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uac1c\ubc1c\ud560 \uc218 \uc788\ub294 \uae30\uc220\uc785\ub2c8\ub2e4. \uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub97c \uc0ac\uc6a9\ud558\uba74 \ubcf5\uc7a1\ud55c \uc124\uc815\uc744 \uc904\uc774\uace0, \ub0b4\uc7a5 \uc11c\ubc84\ub97c \ud1b5\ud574 \uc27d\uac8c \ud14c\uc2a4\ud2b8\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub97c \uc0ac\uc6a9\ud558\uae30 \uc704\ud574\uc11c\ub294 Java Development Kit (JDK)\uc640 Maven \ub610\ub294 Gradle\uacfc \uac19\uc740 \ube4c\ub4dc \ub3c4\uad6c\uac00 \ud544\uc694\ud569\ub2c8\ub2e4. \uc544\ub798\ub294 JDK \ubc0f Maven \uc124\uce58 \ubc29\ubc95\uc785\ub2c8\ub2e4.<\/p>\n
JDK 8 \uc774\uc0c1\uc758 \ubc84\uc804\uc744 \uc124\uce58\ud569\ub2c8\ub2e4. Oracle\uc758 \uacf5\uc2dd \uc6f9\uc0ac\uc774\ud2b8\uc5d0\uc11c \ub2e4\uc6b4\ub85c\ub4dc\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc124\uce58 \ud6c4, \uc544\ub798 \uba85\ub839\uc5b4\ub85c \uc124\uce58\ub41c \ubc84\uc804\uc744 \ud655\uc778\ud569\ub2c8\ub2e4:<\/p>\n
java -version<\/code><\/pre>\n2.2 Maven \uc124\uce58<\/h3>\n
Maven\uc740 \uc2a4\ud504\ub9c1 \ubd80\ud2b8 \ud504\ub85c\uc81d\ud2b8\uc758 \uc758\uc874\uc131\uc744 \uad00\ub9ac\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. Apache Maven\uc758 \uacf5\uc2dd \uc0ac\uc774\ud2b8\uc5d0\uc11c \ub2e4\uc6b4\ub85c\ub4dc \ud6c4 \uc124\uce58\ud569\ub2c8\ub2e4. \uc124\uce58 \ud6c4 \uc544\ub798 \uba85\ub839\uc5b4\ub85c \uc124\uce58\ub41c \ubc84\uc804\uc744 \ud655\uc778\ud569\ub2c8\ub2e4:<\/p>\n
mvn -version<\/code><\/pre>\n2.3 IDE \uc120\ud0dd<\/h3>\n
IntelliJ IDEA, Eclipse, Spring Tool Suite(STS)\uc640 \uac19\uc740 IDE\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 IntelliJ IDEA\ub97c \uae30\uc900\uc73c\ub85c \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
3. \uc2a4\ud504\ub9c1 \ubd80\ud2b8 \ud504\ub85c\uc81d\ud2b8 \uc0dd\uc131<\/h2>\n
\uc2a4\ud504\ub9c1 \ubd80\ud2b8 \ud504\ub85c\uc81d\ud2b8\ub294 Spring Initializr\ub97c \ud1b5\ud574 \uc27d\uac8c \uc0dd\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. Spring Initializr\ub294 \uc2a4\ud504\ub9c1 \ubd80\ud2b8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \uae30\ubcf8 \uad6c\uc870\ub97c \uc790\ub3d9\uc73c\ub85c \uc0dd\uc131\ud574\uc8fc\ub294 \uc6f9 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc785\ub2c8\ub2e4.<\/p>\n
3.1 Spring Initializr \uc811\uadfc\ud558\uae30<\/h3>\n
\uc544\ub798 \ub9c1\ud06c\ub97c \ud1b5\ud574 Spring Initializr\uc5d0 \uc811\uadfc\ud569\ub2c8\ub2e4:
\nSpring Initializr<\/a><\/p>\n3.2 \ud504\ub85c\uc81d\ud2b8 \uc124\uc815<\/h3>\n\n- Project: Maven Project<\/li>\n
- Language: Java<\/li>\n
- Spring Boot: \ucd5c\uc2e0 \ubc84\uc804 \uc120\ud0dd<\/li>\n
- Group: com.example<\/li>\n
- Artifact: blog-api<\/li>\n
- Name: blog-api<\/li>\n
- Description: \ube14\ub85c\uadf8 API \uc608\uc81c<\/li>\n
- Package name: com.example.blogapi<\/li>\n
- Packaging: Jar<\/li>\n
- Java: 11 \uc120\ud0dd<\/li>\n<\/ul>\n
3.3 \uc758\uc874\uc131 \ucd94\uac00<\/h3>\n
\ud544\uc694\ud55c \uc758\uc874\uc131\uc744 \ucd94\uac00\ud569\ub2c8\ub2e4. \ub2e4\uc74c \uc758\uc874\uc131\uc744 \ucd94\uac00\ud558\uc138\uc694:<\/p>\n
\n- Spring Web<\/li>\n
- Spring Data JPA<\/li>\n
- H2 Database (\ub610\ub294 MySQL \uc120\ud0dd \uac00\ub2a5)<\/li>\n<\/ul>\n
\uc124\uc815 \ud6c4, GENERATE<\/strong> \ubc84\ud2bc\uc744 \ud074\ub9ad\ud558\uc5ec ZIP \ud30c\uc77c\uc744 \ub2e4\uc6b4\ub85c\ub4dc\ud558\uace0, \uc6d0\ud558\ub294 \uc704\uce58\uc5d0 \uc555\ucd95\uc744 \ud480\uc5b4\uc90d\ub2c8\ub2e4.<\/p>\n4. \ud504\ub85c\uc81d\ud2b8 \uad6c\uc870 \uc774\ud574\ud558\uae30<\/h2>\n
\uc0dd\uc131\ub41c \ud504\ub85c\uc81d\ud2b8 \ud3f4\ub354 \uad6c\uc870\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \ud615\ud0dc\uc785\ub2c8\ub2e4:<\/p>\n
\nblog-api\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 blogapi\n \u2502 \u2502 \u2502 \u2514\u2500\u2500 BlogApiApplication.java\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 \u251c\u2500\u2500 pom.xml\n<\/code><\/pre>\n5. \ub3c4\uba54\uc778 \uac1d\uccb4 \ub9cc\ub4e4\uae30<\/h2>\n
\uc774\uc81c \ube14\ub85c\uadf8 \ud3ec\uc2a4\ud2b8\ub97c \ub098\ud0c0\ub0b4\ub294 \ub3c4\uba54\uc778 \uac1d\uccb4\ub97c \ub9cc\ub4e4\uc5b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. Post<\/code> \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud558\uc5ec \ube14\ub85c\uadf8 \ud3ec\uc2a4\ud2b8\uc758 \uc18d\uc131\uc744 \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n5.1 Post \ud074\ub798\uc2a4 \uc0dd\uc131<\/h3>\n
src\/main\/java\/com\/example\/blogapi<\/code> \ud3f4\ub354 \ub0b4\uc5d0 Post.java<\/code> \ud30c\uc77c\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4:<\/p>\n\npackage com.example.blogapi;\n\nimport javax.persistence.Entity;\nimport javax.persistence.GeneratedValue;\nimport javax.persistence.GenerationType;\nimport javax.persistence.Id;\n\n@Entity\npublic class Post {\n @Id\n @GeneratedValue(strategy = GenerationType.IDENTITY)\n private Long id;\n private String title;\n private String content;\n\n \/\/ getters and setters\n}\n<\/code><\/pre>\n6. \ub9ac\ud3ec\uc9c0\ud1a0\ub9ac \uc778\ud130\ud398\uc774\uc2a4 \ub9cc\ub4e4\uae30<\/h2>\n
\ub370\uc774\ud130\ubca0\uc774\uc2a4\uc640 \uc0c1\ud638\uc791\uc6a9\ud558\uae30 \uc704\ud574 JPA \ub9ac\ud3ec\uc9c0\ud1a0\ub9ac\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. PostRepository<\/code> \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc0dd\uc131\ud558\uc5ec CRUD \uae30\ub2a5\uc744 \uad6c\ud604\ud569\ub2c8\ub2e4.<\/p>\n6.1 PostRepository \uc778\ud130\ud398\uc774\uc2a4 \uc0dd\uc131<\/h3>\n
src\/main\/java\/com\/example\/blogapi<\/code> \ud3f4\ub354 \ub0b4\uc5d0 PostRepository.java<\/code> \ud30c\uc77c\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4:<\/p>\n\npackage com.example.blogapi;\n\nimport org.springframework.data.jpa.repository.JpaRepository;\n\npublic interface PostRepository extends JpaRepository {\n}\n<\/post,><\/code><\/pre>\n7. \uc11c\ube44\uc2a4 \ud074\ub798\uc2a4 \ub9cc\ub4e4\uae30<\/h2>\n
\ube44\uc988\ub2c8\uc2a4 \ub85c\uc9c1\uc744 \ucc98\ub9ac\ud558\uae30 \uc704\ud574 \uc11c\ube44\uc2a4 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. PostService<\/code> \ud074\ub798\uc2a4\ub97c \ub9cc\ub4e4\uc5b4 \ube14\ub85c\uadf8 \ud3ec\uc2a4\ud2b8\uc758 CRUD \uae30\ub2a5\uc744 \uad6c\ud604\ud569\ub2c8\ub2e4.<\/p>\n7.1 PostService \ud074\ub798\uc2a4 \uc0dd\uc131<\/h3>\n
src\/main\/java\/com\/example\/blogapi<\/code> \ud3f4\ub354 \ub0b4\uc5d0 PostService.java<\/code> \ud30c\uc77c\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4:<\/p>\n\npackage com.example.blogapi;\n\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.stereotype.Service;\nimport java.util.List;\n\n@Service\npublic class PostService {\n @Autowired\n private PostRepository postRepository;\n\n public List getAllPosts() {\n return postRepository.findAll();\n }\n\n public Post getPostById(Long id) {\n return postRepository.findById(id).orElse(null);\n }\n\n public Post createPost(Post post) {\n return postRepository.save(post);\n }\n\n public Post updatePost(Long id, Post post) {\n Post existingPost = postRepository.findById(id).orElse(null);\n if (existingPost != null) {\n existingPost.setTitle(post.getTitle());\n existingPost.setContent(post.getContent());\n return postRepository.save(existingPost);\n }\n return null;\n }\n\n public void deletePost(Long id) {\n postRepository.deleteById(id);\n }\n}\n<\/post><\/code><\/pre>\n8. \ucee8\ud2b8\ub864\ub7ec \ud074\ub798\uc2a4 \ub9cc\ub4e4\uae30<\/h2>\n
\ud074\ub77c\uc774\uc5b8\ud2b8\uc758 \uc694\uccad\uc744 \ucc98\ub9ac\ud560 RESTful API\ub97c \uc0dd\uc131\ud558\uae30 \uc704\ud574 \ucee8\ud2b8\ub864\ub7ec \ud074\ub798\uc2a4\ub97c \uc791\uc131\ud569\ub2c8\ub2e4.<\/p>\n
8.1 PostController \ud074\ub798\uc2a4 \uc0dd\uc131<\/h3>\n
src\/main\/java\/com\/example\/blogapi<\/code> \ud3f4\ub354 \ub0b4\uc5d0 PostController.java<\/code> \ud30c\uc77c\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4:<\/p>\n\npackage com.example.blogapi;\n\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.http.HttpStatus;\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 @GetMapping\n public List getAllPosts() {\n return postService.getAllPosts();\n }\n\n @GetMapping(\"\/{id}\")\n public Post getPostById(@PathVariable Long id) {\n return postService.getPostById(id);\n }\n\n @PostMapping\n public Post createPost(@RequestBody Post post) {\n return postService.createPost(post);\n }\n\n @PutMapping(\"\/{id}\")\n public Post updatePost(@PathVariable Long id, @RequestBody Post post) {\n return postService.updatePost(id, post);\n }\n\n @DeleteMapping(\"\/{id}\")\n @ResponseStatus(HttpStatus.NO_CONTENT)\n public void deletePost(@PathVariable Long id) {\n postService.deletePost(id);\n }\n}\n<\/post><\/code><\/pre>\n9. \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc18d\uc131 \uc124\uc815<\/h2>\n
\ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5f0\uacb0 \ubc0f \uae30\ud0c0 \uc124\uc815\uc744 \uc704\ud574 application.properties<\/code> \ud30c\uc77c\uc744 \uc218\uc815\ud569\ub2c8\ub2e4.<\/p>\n9.1 H2 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc124\uc815<\/h3>\n
src\/main\/resources\/application.properties<\/code> \ud30c\uc77c\uc744 \ub2e4\uc74c\uacfc \uac19\uc774 \uc218\uc815\ud569\ub2c8\ub2e4:<\/p>\n\n# H2 Database\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>\n10. \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uc2e4\ud589\ud558\uae30<\/h2>\n
\uc774\uc81c \ubaa8\ub4e0 \uc124\uc815\uc774 \uc644\ub8cc\ub418\uc5c8\uc2b5\ub2c8\ub2e4. IDE\uc5d0\uc11c BlogApiApplication.java<\/code> \ud074\ub798\uc2a4\ub97c \uc2e4\ud589\ud558\uc5ec \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc2dc\uc791\ud569\ub2c8\ub2e4.<\/p>\n10.1 H2 \ucf58\uc194 \uc811\uadfc\ud558\uae30<\/h3>\n
\uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \uc815\uc0c1\uc801\uc73c\ub85c \uc2e4\ud589\ub418\uba74, H2 \ucf58\uc194\uc5d0 \uc811\uadfc\ud558\uc5ec \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub97c \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n
\n- \uc6f9 \ube0c\ub77c\uc6b0\uc800\uc5d0\uc11c http:\/\/localhost:8080\/h2-console<\/a>\uc5d0 \uc811\uc18d\ud569\ub2c8\ub2e4.<\/li>\n
- JDBC URL:
jdbc:h2:mem:testdb<\/code><\/li>\n \uc785\ub825 \ud6c4, Connect<\/strong> \ubc84\ud2bc \ud074\ub9ad\ud569\ub2c8\ub2e4.\n<\/ul>\n11. API \ud14c\uc2a4\ud2b8\ud558\uae30<\/h2>\n
\uc774\uc81c Postman\uc774\ub098 cURL\uc744 \uc0ac\uc6a9\ud558\uc5ec API\ub97c \ud14c\uc2a4\ud2b8\ud574\ubd05\uc2dc\ub2e4.<\/p>\n
11.1 Postman \uc124\uce58<\/h3>\n
Postman\uc740 API\ub97c \ud14c\uc2a4\ud2b8\ud558\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 \uc720\uc6a9\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4. Postman\uc744 \uc124\uce58\ud55c \ud6c4, \uc544\ub798\uc640 \uac19\uc774 \uc694\uccad\uc744 \ubcf4\ub0bc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
11.2 API \uc694\uccad \uc608\uc81c<\/h3>\n\n- GET \/api\/posts<\/strong>: \ubaa8\ub4e0 \ud3ec\uc2a4\ud2b8 \uc870\ud68c<\/li>\n
- GET \/api\/posts\/{id}<\/strong>: \ud2b9\uc815 \ud3ec\uc2a4\ud2b8 \uc870\ud68c<\/li>\n
- POST \/api\/posts<\/strong>: \ud3ec\uc2a4\ud2b8 \uc0dd\uc131<\/li>\n
- PUT \/api\/posts\/{id}<\/strong>: \ud3ec\uc2a4\ud2b8 \uc218\uc815<\/li>\n
- DELETE \/api\/posts\/{id}<\/strong>: \ud3ec\uc2a4\ud2b8 \uc0ad\uc81c<\/li>\n<\/ul>\n
11.2.1 POST \uc694\uccad \uc608\uc81c:<\/h4>\n\nPOST \/api\/posts\nContent-Type: application\/json\n\n{\n \"title\": \"\uccab \ud3ec\uc2a4\ud2b8\",\n \"content\": \"\uc548\ub155\ud558\uc138\uc694, \uccab \ud3ec\uc2a4\ud2b8\uc785\ub2c8\ub2e4.\"\n}\n<\/code><\/pre>\n11.2.2 GET \uc694\uccad \uc608\uc81c:<\/h4>\n\nGET \/api\/posts\n<\/code><\/pre>\n12. \ub9c8\ubb34\ub9ac<\/h2>\n
\uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec \uac04\ub2e8\ud55c \ube14\ub85c\uadf8 API\ub97c \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc744 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \ub3c4\uba54\uc778 \uac1d\uccb4, \ub9ac\ud3ec\uc9c0\ud1a0\ub9ac, \uc11c\ube44\uc2a4, \ucee8\ud2b8\ub864\ub7ec\ub97c \ubaa8\ub450 \uc124\uc815\ud558\uace0, Postman\uc744 \uc0ac\uc6a9\ud558\uc5ec API\ub97c \ud14c\uc2a4\ud2b8\ud558\ub294 \uacfc\uc815\uc744 \uc0b4\ud3b4\ubcf4\uc558\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc774\uc81c \uc5ec\ub7ec\ubd84\uc740 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub97c \ud1b5\ud574 \ube14\ub85c\uadf8 API\ub97c \uc0dd\uc131\ud560 \uc218 \uc788\ub294 \uae30\ucd08\ub97c \ub9c8\ub828\ud558\uc600\uc2b5\ub2c8\ub2e4. \ucd94\uac00\uc801\uc73c\ub85c \ub354 \ub9ce\uc740 \uae30\ub2a5\uc744 \uad6c\ud604\ud558\uac70\ub098, \ub2e4\ub978 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub85c\uc758 \uc804\ud658, \ubc30\ud3ec \ubc29\ubc95 \ub4f1\uc744 \ud559\uc2b5\ud558\uba70 \uc9c0\uc2dd\uc744 \ud655\uc7a5\ud574 \ub098\uac00\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n
References<\/h2>\n