https:\/\/start.spring.io\/<\/a>)\ub97c \ud1b5\ud574 \uc0c8\ub85c\uc6b4 \uc2a4\ud504\ub9c1 \ubd80\ud2b8 \ud504\ub85c\uc81d\ud2b8\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \ud544\uc694\ud55c \uc758\uc874\uc131\uc744 \ucd94\uac00\ud558\uace0, \ud504\ub85c\uc81d\ud2b8\ub97c \ub2e4\uc6b4\ub85c\ub4dc\ud558\uc5ec IDE\uc5d0\uc11c \uc5fd\ub2c8\ub2e4.<\/p>\n5.2 \uc5d4\ud2f0\ud2f0 \ud074\ub798\uc2a4 \uc0dd\uc131\ud558\uae30<\/h3>\n
JPA\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ud14c\uc774\ube14\uacfc \ub9e4\ud551\ud560 \uc5d4\ud2f0\ud2f0 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, User<\/code>\ub77c\ub294 \uc5d4\ud2f0\ud2f0 \ud074\ub798\uc2a4\ub97c \ub9cc\ub4e4\uc5b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n@Entity\npublic class User {\n @Id\n @GeneratedValue(strategy = GenerationType.IDENTITY)\n private Long id;\n\n private String name;\n private String email;\n\n \/\/ getters and setters\n}\n <\/code><\/pre>\n5.3 \ub808\ud3ec\uc9c0\ud1a0\ub9ac \uc778\ud130\ud398\uc774\uc2a4 \uc0dd\uc131\ud558\uae30<\/h3>\n
User \ud074\ub798\uc2a4\ub97c \uc704\ud55c \ub808\ud3ec\uc9c0\ud1a0\ub9ac \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc2a4\ud504\ub9c1 \ub370\uc774\ud130 JPA\ub97c \uc0ac\uc6a9\ud558\uc5ec CRUD \uae30\ub2a5\uc744 \uc790\ub3d9\uc73c\ub85c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/p>\n
import org.springframework.data.jpa.repository.JpaRepository;\n\npublic interface UserRepository extends JpaRepository {\n}\n <\/user,><\/code><\/pre>\n5.4 \uc11c\ube44\uc2a4 \ud074\ub798\uc2a4 \uc0dd\uc131\ud558\uae30<\/h3>\n
\ube44\uc988\ub2c8\uc2a4 \ub85c\uc9c1\uc744 \ucc98\ub9ac\ud560 \uc11c\ube44\uc2a4 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/p>\n
import org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.stereotype.Service;\n\nimport java.util.List;\n\n@Service\npublic class UserService {\n @Autowired\n private UserRepository userRepository;\n\n public List findAll() {\n return userRepository.findAll();\n }\n\n public User save(User user) {\n return userRepository.save(user);\n }\n}\n <\/user><\/code><\/pre>\n5.5 REST \ucee8\ud2b8\ub864\ub7ec \uc0dd\uc131\ud558\uae30<\/h3>\n
RESTful API\ub97c \uc81c\uacf5\ud560 \ucee8\ud2b8\ub864\ub7ec\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc0ac\uc6a9\uc790\uc758 \uc694\uccad\uc744 \ucc98\ub9ac\ud558\uace0 \uc11c\ube44\uc2a4\ub97c \ud638\ucd9c\ud569\ub2c8\ub2e4.<\/p>\n
import org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.web.bind.annotation.*;\n\nimport java.util.List;\n\n@RestController\n@RequestMapping(\"\/api\/users\")\npublic class UserController {\n @Autowired\n private UserService userService;\n\n @GetMapping\n public List getAllUsers() {\n return userService.findAll();\n }\n\n @PostMapping\n public User createUser(@RequestBody User user) {\n return userService.save(user);\n }\n}\n <\/user><\/code><\/pre>\n<\/section>\n\n6. JPA\uc758 \uace0\uae09 \uae30\ub2a5<\/h2>\n
JPA\ub97c \uc0ac\uc6a9\ud558\uba74 \uae30\ubcf8\uc801\uc778 CRUD \uc678\uc5d0\ub3c4 \ub2e4\uc591\ud55c \uae30\ub2a5\ub4e4\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uba87 \uac00\uc9c0 \uc8fc\uc694 \uae30\ub2a5\ub4e4\uc744 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4:<\/p>\n
6.1 JPQL(Java Persistence Query Language)<\/h3>\n
JPQL\uc740 JPA\uc5d0\uc11c \uc81c\uacf5\ud558\ub294 \uac1d\uccb4 \uc9c0\ud5a5 \ucffc\ub9ac \uc5b8\uc5b4\uc785\ub2c8\ub2e4. JPQL\uc744 \uc0ac\uc6a9\ud558\uba74 \uac1d\uccb4\ub97c \uae30\uc900\uc73c\ub85c \ucffc\ub9ac\ub97c \uc791\uc131\ud560 \uc218 \uc788\uc5b4, SQL \ucffc\ub9ac\ubcf4\ub2e4 \ub354 \uc9c1\uad00\uc801\uc785\ub2c8\ub2e4.<\/p>\n
List users = entityManager.createQuery(\"SELECT u FROM User u WHERE u.name = :name\", User.class)\n .setParameter(\"name\", \"John\")\n .getResultList();\n <\/user><\/code><\/pre>\n6.2 @Query \uc5b4\ub178\ud14c\uc774\uc158<\/h3>\n
JPA\uc5d0\uc11c\ub294 \uba54\uc11c\ub4dc\uc5d0 @Query<\/code> \uc5b4\ub178\ud14c\uc774\uc158\uc744 \uc0ac\uc6a9\ud558\uc5ec \ucee4\uc2a4\ud140 \ucffc\ub9ac\ub97c \uc815\uc758\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\nimport org.springframework.data.jpa.repository.Query;\n\npublic interface UserRepository extends JpaRepository {\n @Query(\"SELECT u FROM User u WHERE u.email = ?1\")\n User findByEmail(String email);\n}\n <\/user,><\/code><\/pre>\n6.3 \ud398\uc774\uc9d5\uacfc \uc815\ub82c<\/h3>\n
\uc2a4\ud504\ub9c1 \ub370\uc774\ud130 JPA\ub294 \ud398\uc774\uc9d5 \ubc0f \uc815\ub82c\uc744 \uc27d\uac8c \ucc98\ub9ac\ud560 \uc218 \uc788\ub294 \uae30\ub2a5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \ub9cc\ub4e0 \ub808\ud3ec\uc9c0\ud1a0\ub9ac \uc778\ud130\ud398\uc774\uc2a4\uc5d0\uc11c PagingAndSortingRepository<\/code>\ub97c \uc0c1\uc18d\ubc1b\uc544 \uba54\uc11c\ub4dc\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\npublic interface UserRepository extends PagingAndSortingRepository {\n}\n <\/user,><\/code><\/pre>\n<\/section>\n\n7. \ud558\uc774\ubc84\ub124\uc774\ud2b8\uc758 \uace0\uae09 \uae30\ub2a5<\/h2>\n
\ud558\uc774\ubc84\ub124\uc774\ud2b8\ub294 \uc131\ub2a5 \ud29c\ub2dd \ubc0f \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub828 \ub2e4\uc591\ud55c \uae30\ub2a5\ub4e4\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uce90\uc2dc \uad00\ub9ac, \ubc30\uce58 \ucc98\ub9ac, \ub2e4\uc911 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc9c0\uc6d0 \ub4f1\uc744 \ud1b5\ud574 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \uc131\ub2a5\uc744 \ub300\ud3ed \ud5a5\uc0c1\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
7.1 1\ucc28 \uce90\uc2dc\uc640 2\ucc28 \uce90\uc2dc<\/h3>\n
\ud558\uc774\ubc84\ub124\uc774\ud2b8\ub294 \uae30\ubcf8\uc801\uc73c\ub85c 1\ucc28 \uce90\uc2dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub3d9\uc77c\ud55c \uc138\uc158 \ub0b4\uc5d0\uc11c \uc870\ud68c\ud55c \ub370\uc774\ud130\ub294 \uba54\ubaa8\ub9ac\uc5d0 \uc800\uc7a5\ud558\uc5ec \uc131\ub2a5\uc744 \ud5a5\uc0c1\uc2dc\ud0b5\ub2c8\ub2e4. 2\ucc28 \uce90\uc2dc\ub294 \uc5ec\ub7ec \uc138\uc158\uc5d0\uc11c \uacf5\uc720\ud560 \uc218 \uc788\ub294 \uce90\uc2dc\ub85c, \uc131\ub2a5\uc744 \ucd5c\uc801\ud654\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
7.2 \ubc30\uce58 \ucc98\ub9ac<\/h3>\n
\ud558\uc774\ubc84\ub124\uc774\ud2b8\ub294 \ub300\ub7c9\uc758 \ub370\uc774\ud130\ub97c \ud55c \ubc88\uc5d0 \ucc98\ub9ac\ud560 \ub54c \ubc30\uce58 \ucc98\ub9ac(batch processing)\ub97c \uc9c0\uc6d0\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5f0\uacb0 \uc218\ub97c \ucd5c\uc18c\ud654\ud558\uace0 \uc131\ub2a5\uc744 \uac1c\uc120\ud569\ub2c8\ub2e4.<\/p>\n<\/section>\n\n8. \uacb0\ub860<\/h2>\n
\uc2a4\ud504\ub9c1 \ubd80\ud2b8\uc640 JPA, \ud558\uc774\ubc84\ub124\uc774\ud2b8\ub294 \ud604\ub300\uc801\uc778 \ubc31\uc5d4\ub4dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158 \uac1c\ubc1c\uc744 \uc704\ud55c \uac15\ub825\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4. \uc774 \uac15\uc88c\ub97c \ud1b5\ud574 \uc5ec\ub7ec\ubd84\uc740 \uc2a4\ud504\ub9c1 \ubd80\ud2b8\uc758 \uae30\ubcf8\uc801\uc778 \uc774\ud574\ubd80\ud130 \uc2dc\uc791\ud558\uc5ec JPA\uc640 \ud558\uc774\ubc84\ub124\uc774\ud2b8\ub97c \ud65c\uc6a9\ud55c \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ucc98\ub9ac\uae4c\uc9c0 \ud3ed\ub113\uc740 \uc9c0\uc2dd\uc744 \uac16\ucd9c \uc218 \uc788\uc744 \uac83\uc785\ub2c8\ub2e4. \uc2e4\uc81c \ud504\ub85c\uc81d\ud2b8\uc5d0 \uc801\uc6a9\ud574 \ubcf4\uba74\uc11c \ub354 \uae4a\uc774 \uc788\ub294 \uacbd\ud5d8\uc744 \uc313\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n<\/section>\n<\/article>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"
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