\ud604\ub300 \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\ubc1c\uc5d0\uc11c \uc774\uc2dd \uac00\ub2a5\uc131\uc740 \ub9e4\uc6b0 \uc911\uc694\ud55c \uc694\uc18c\ub85c \uc790\ub9ac\uc7a1\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ubc31\uc5d4\ub4dc \uac1c\ubc1c\uc5d0 \uc788\uc5b4\uc11c\ub3c4 \uc11c\ube44\uc2a4 \ucd94\uc0c1\ud654\ub97c \ud1b5\ud574 \ube44\uc988\ub2c8\uc2a4 \uaddc\uce59\uc744 \ud6a8\uacfc\uc801\uc73c\ub85c \uad00\ub9ac\ud558\uace0, \uc720\uc9c0 \ubcf4\uc218\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\uba70, \ud300 \uac04\uc758 \ud611\uc5c5\uc744 \uc6d0\ud65c\ud558\uac8c \ud558\ub294 \uac83\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub97c \uc774\uc6a9\ud55c \ubc31\uc5d4\ub4dc \uac1c\ubc1c\uc5d0 \uc911\uc810\uc744 \ub450\uace0, \uc774\uc2dd \uac00\ub2a5\ud55c \uc11c\ube44\uc2a4 \ucd94\uc0c1\ud654\uc758 \uac1c\ub150\uacfc \uad6c\ud604(methodology)\uc5d0 \ub300\ud574 \uae4a\uc774 \uc54c\uc544\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc11c\ube44\uc2a4 \ucd94\uc0c1\ud654(Service Abstraction)\ub294 \uac1c\ubc1c\uc790\uac00 \ube44\uc988\ub2c8\uc2a4 \ub85c\uc9c1\uc744 \uad6c\ud604\ud560 \ub54c, \uc2dc\uc2a4\ud15c\uc758 \ub2e4\uc591\ud55c \ubcc0\ud654\uc5d0 \uc601\ud5a5\uc744 \ubc1b\uc9c0 \uc54a\ub3c4\ub85d, \ud2b9\uc815 \ube44\uc988\ub2c8\uc2a4 \uae30\ub2a5\uc744 \ubcc4\ub3c4\ub85c \ubd84\ub9ac\ud574 \ub450\ub294 \uac1c\ub150\uc785\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uac1c\ubc1c\uc790\ub294 \ucd94\uc0c1\ud654\ub41c \uc11c\ube44\uc2a4\ub97c \ud1b5\ud574 \uae30\ub2a5\uc5d0 \uc811\uadfc\ud558\uace0, \uc11c\ube44\uc2a4 \uad6c\ud604\ubd80\uc758 \ubcc0\uacbd \uc0ac\ud56d\uc774 \ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0\uac8c \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \ucd5c\uc18c\ud654\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub294 \uc790\ubc14 \uae30\ubc18\uc758 \ud504\ub808\uc784\uc6cc\ud06c\ub85c, \uc11c\ube44\uc2a4 \ucd94\uc0c1\ud654\ub97c \uc27d\uac8c \uad6c\ud604\ud560 \uc218 \uc788\ub294 \uc5ec\ub7ec \uae30\ub2a5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc5ec\uae30\uc11c \uc6b0\ub9ac\ub294 \uba3c\uc800, \uc11c\ube44\uc2a4 \ucd94\uc0c1\ud654\ub97c \uc704\ud574 \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\n \uc774\uc81c \uc704\uc5d0\uc11c \uc815\uc758\ud55c \uc778\ud130\ud398\uc774\uc2a4\ub97c \uad6c\ud604\ud558\ub294 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/p>\n \uc774\uc81c \uc0ac\uc6a9\uc790 \uc11c\ube44\uc2a4\ub97c REST API \ud615\ud0dc\ub85c \uc81c\uacf5\ud558\uae30 \uc704\ud574 \ucee8\ud2b8\ub864\ub7ec\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/p>\n \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubc31\uc5d4\ub4dc \uac1c\ubc1c \uc2dc \uc774\uc2dd \uac00\ub2a5\ud55c \uc11c\ube44\uc2a4 \ucd94\uc0c1\ud654\ub97c \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc54c\uc544\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \uc11c\ube44\uc2a4 \ucd94\uc0c1\ud654\ub294 \uc720\uc9c0 \ubcf4\uc218\uc640 \ud14c\uc2a4\ud2b8\uc758 \uc6a9\uc774\uc131, \ucf54\ub4dc \uc7ac\uc0ac\uc6a9\uc131\uc744 \uc81c\uacf5\ud558\uc5ec \uac1c\ubc1c\uc758 \ud6a8\uc728\uc131\uc744 \uadf9\ub300\ud654\ud569\ub2c8\ub2e4. \uc2a4\ud504\ub9c1 \ubd80\ud2b8\uc758 \ub2e4\uc591\ud55c \uae30\ub2a5\uc744 \ud65c\uc6a9\ud558\uc5ec \uc2e4\uc6a9\uc801\uc778 \uc11c\ube44\uc2a4\ub97c \uc124\uacc4\ud568\uc73c\ub85c\uc368, \uc5ec\ub7ec\ubd84\uc758 \uac1c\ubc1c \uc5ed\ub7c9\uc744 \ud55c \ub2e8\uacc4 \ub04c\uc5b4\uc62c\ub9ac\uc2dc\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n \ub2e4\uc74c \uac15\uc88c\uc5d0\uc11c\ub294 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\uc5d0\uc11c\uc758 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub9ac \ubc0f JPA\/Hibernate\ub97c \ud1b5\ud55c ORM \uad6c\ud604\uc5d0 \ub300\ud574 \ub2e4\ub8f0 \uc608\uc815\uc785\ub2c8\ub2e4. \ub9ce\uc740 \uad00\uc2ec \ubd80\ud0c1\ub4dc\ub9bd\ub2c8\ub2e4!<\/p>\n@Service<\/code> \uc5b4\ub178\ud14c\uc774\uc158\uc744 \ud65c\uc6a9\ud558\uc5ec \uc11c\ube44\uc2a4\ub97c \uc815\uc758\ud558\uace0, Dependency Injection<\/code>\uc744 \ud1b5\ud574 \ud544\uc694\ud55c \ucef4\ud3ec\ub10c\ud2b8\ub97c \uc8fc\uc785\ubc1b\ub294 \ubc29\uc2dd\uc744 \uc124\uba85\ud569\ub2c8\ub2e4.<\/p>\n2.1 \uc2a4\ud504\ub9c1 \ubd80\ud2b8 \ud504\ub85c\uc81d\ud2b8 \uc124\uc815<\/h3>\n
mvn archetype:generate -DgroupId=com.example -DartifactId=myapp -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false<\/code><\/pre>\n2.2 \uc758\uc874\uc131 \uc124\uc815<\/h3>\n
pom.xml<\/code> \ud30c\uc77c\uc5d0 \uc2a4\ud504\ub9c1 \ubd80\ud2b8 \uc2a4\ud0c0\ud130 \uc758\uc874\uc131\uc744 \ucd94\uac00\ud569\ub2c8\ub2e4.<\/p>\n<dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter<\/artifactId>\n<\/dependency><\/code><\/pre>\n2.3 \uc11c\ube44\uc2a4 \uc778\ud130\ud398\uc774\uc2a4 \uc815\uc758<\/h3>\n
public interface UserService {\n User createUser(User user);\n User getUserById(Long id);\n List<User> getAllUsers();\n void deleteUser(Long id);\n}<\/code><\/pre>\n2.4 \uc11c\ube44\uc2a4 \uad6c\ud604<\/h3>\n
@Service\npublic class UserServiceImpl implements UserService {\n \/\/ Repository\ub97c \uc8fc\uc785\ubc1b\uc544 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc791\uc5c5 \uc218\ud589\n @Autowired\n private UserRepository userRepository;\n\n @Override\n public User createUser(User user) {\n return userRepository.save(user);\n }\n\n @Override\n public User getUserById(Long id) {\n return userRepository.findById(id).orElse(null);\n }\n\n @Override\n public List<User> getAllUsers() {\n return userRepository.findAll();\n }\n\n @Override\n public void deleteUser(Long id) {\n userRepository.deleteById(id);\n }\n}<\/code><\/pre>\n3. REST API\ub85c \uc11c\ube44\uc2a4 \uc0ac\uc6a9\ud558\uae30<\/h2>\n
@RestController\n@RequestMapping(\"\/api\/users\")\npublic class UserController {\n @Autowired\n private UserService userService;\n\n @PostMapping\n public ResponseEntity<User> createUser(@RequestBody User user) {\n return ResponseEntity.ok(userService.createUser(user));\n }\n\n @GetMapping(\"\/{id}\")\n public ResponseEntity<User> getUserById(@PathVariable Long id) {\n User user = userService.getUserById(id);\n return ResponseEntity.ok(user);\n }\n\n @GetMapping\n public ResponseEntity<List<User>> getAllUsers() {\n return ResponseEntity.ok(userService.getAllUsers());\n }\n\n @DeleteMapping(\"\/{id}\")\n public ResponseEntity<Void> deleteUser(@PathVariable Long id) {\n userService.deleteUser(id);\n return ResponseEntity.noContent().build();\n }\n}<\/code><\/pre>\n4. \uacb0\ub860<\/h2>\n
5. \ub2e4\uc74c \uac15\uc88c \uc608\uace0<\/h2>\n