\u73fe\u4ee3\u306eJava\u958b\u767a\u306b\u304a\u3044\u3066\u3001Spring Boot\u3068JPA\uff08Java Persistence API\uff09\u306f\u975e\u5e38\u306b\u91cd\u8981\u306a\u6280\u8853\u30b9\u30bf\u30c3\u30af\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u52b9\u7387\u7684\u3067\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3092\u53ef\u80fd\u306b\u3057\u3001\u591a\u304f\u306e\u958b\u767a\u8005\u306b\u652f\u6301\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001Spring Boot\u3068JPA\u306e\u6982\u8981\u3001\u305d\u3057\u3066\u3053\u308c\u3089\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u306e\u5229\u70b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u76ee\u6b21 <\/p>\n
Spring Boot\u306f\u3001Java\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8fc5\u901f\u306a\u958b\u767a\u3092\u53ef\u80fd\u306b\u3059\u308b\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n
\u3053\u308c\u3089\u306e\u7279\u5fb4\u306b\u3088\u308a\u3001Spring Boot\u306f\u958b\u767a\u306e\u8fc5\u901f\u5316\u3001\u8a2d\u5b9a\u306e\u7c21\u7d20\u5316\u3001\u305d\u3057\u3066\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u5b9f\u73fe\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
JPA\uff08Java Persistence API\uff09\u306f\u3001Java\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u6a19\u6e96\u5316\u3055\u308c\u305fAPI\u3067\u3059\u3002\u4e3b\u306a\u7279\u5fb4\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n
JPA\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u306e\u62bd\u8c61\u5316\u3001\u30d9\u30f3\u30c0\u30fc\u975e\u4f9d\u5b58\u306e\u30b3\u30fc\u30c9\u4f5c\u6210\u3001\u305d\u3057\u3066\u958b\u767a\u751f\u7523\u6027\u306e\u5411\u4e0a\u304c\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
Spring Boot\u306fJPA\u306e\u5b9f\u88c5\uff08\u4e3b\u306bHibernate\uff09\u3092\u5bb9\u6613\u306b\u7d71\u5408\u3057\u3001\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u5c64\u306e\u958b\u767a\u3092\u5927\u5e45\u306b\u7c21\u7d20\u5316\u3057\u307e\u3059\u3002\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306e\u4e3b\u306a\u5229\u70b9\u306f\uff1a<\/p>\n\n\n\n
Spring Boot with JPA\u306f\u3001Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u958b\u767a\u3001\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3001\u30c7\u30fc\u30bf\u99c6\u52d5\u578b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306a\u3069\u3001\u5e45\u5e83\u3044\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u6d3b\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u4ee5\u964d\u306e\u7ae0\u3067\u306f\u3001Spring Boot\u3068JPA\u3092\u4f7f\u7528\u3057\u305f\u958b\u767a\u306e\u8a73\u7d30\u306a\u624b\u9806\u3001\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3001\u305d\u3057\u3066\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u3064\u3044\u3066\u6df1\u6398\u308a\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u306e\u5f37\u529b\u306a\u7d44\u307f\u5408\u308f\u305b\u3092\u7406\u89e3\u3057\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044Java\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
Spring Boot\u3068JPA\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u74b0\u5883\u8a2d\u5b9a\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u6210\u529f\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u9069\u5207\u306a\u8a2d\u5b9a\u306b\u3088\u308a\u3001\u958b\u767a\u52b9\u7387\u3092\u5411\u4e0a\u3055\u305b\u3001\u6f5c\u5728\u7684\u306a\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u74b0\u5883\u8a2d\u5b9a\u306e\u4e3b\u8981\u306a\u5074\u9762\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
Spring Boot with JPA\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u4e3b\u8981\u306a\u4f9d\u5b58\u95a2\u4fc2\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n
Maven\u4f7f\u7528\u6642\u306e JPA\u8a2d\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002\u4e3b\u8981\u306a\u8a2d\u5b9a\u9805\u76ee\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n \u4f7f\u7528\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u5fdc\u3058\u3066\u3001\u63a5\u7d9a\u8a2d\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4e3b\u8981\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n \u74b0\u5883\u8a2d\u5b9a\u6642\u306b\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n \u9069\u5207\u306a\u74b0\u5883\u8a2d\u5b9a\u306b\u3088\u308a\u3001Spring Boot\u3068JPA\u3092\u4f7f\u7528\u3057\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3092\u30b9\u30e0\u30fc\u30ba\u306b\u9032\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u306e\u74b0\u5883\u3092\u6d3b\u7528\u3057\u3066\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u30ea\u30dd\u30b8\u30c8\u30ea\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n Spring Boot with JPA\u3092\u4f7f\u7528\u3059\u308b\u969b\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u9069\u5207\u306a\u8a2d\u8a08\u3068\u5b9f\u88c5\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001JPA\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5b9a\u7fa9\u3001Spring Data JPA\u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u4f5c\u6210\u3001\u305d\u3057\u3066\u30ab\u30b9\u30bf\u30e0\u30af\u30a8\u30ea\u306e\u5b9f\u88c5\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n JPA\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c6\u30fc\u30d6\u30eb\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3055\u308c\u308bJava\u30af\u30e9\u30b9\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u4e3b\u8981\u306a\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u5b9a\u7fa9\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u4f8b\uff1a<\/p>\n\n\n\n Spring Data JPA\u30ea\u30dd\u30b8\u30c8\u30ea\u306f\u3001\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u5bfe\u3059\u308bCRUD\u64cd\u4f5c\u3092\u63d0\u4f9b\u3059\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u3059\u3002 \u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u4f8b\uff1a<\/p>\n\n\n\n Spring Data JPA\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u65b9\u6cd5\u3067\u30ab\u30b9\u30bf\u30e0\u30af\u30a8\u30ea\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n \u9069\u5207\u306b\u8a2d\u8a08\u3055\u308c\u305f\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u30ea\u30dd\u30b8\u30c8\u30ea\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fdd\u5b88\u6027\u3068\u62e1\u5f35\u6027\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u3092\u6d3b\u7528\u3057\u3066CRUD\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n CRUD\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\uff08Create\u3001Read\u3001Update\u3001Delete\uff09\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u306e\u57fa\u672c\u3068\u306a\u308b\u64cd\u4f5c\u30bb\u30c3\u30c8\u3067\u3059\u3002Spring Boot with JPA\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u3053\u308c\u3089\u306e\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u7c21\u5358\u304b\u3064\u52b9\u7387\u7684\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5404CRUD\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u88c5\u65b9\u6cd5\u3068\u3001\u95a2\u9023\u3059\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n \u30c7\u30fc\u30bf\u306e\u4f5c\u6210\u3068\u4fdd\u5b58\u306f\u3001 \u8907\u6570\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u4e00\u5ea6\u306b\u4fdd\u5b58\u3059\u308b\u5834\u5408\u306f\u3001 \u30c7\u30fc\u30bf\u306e\u8aad\u307f\u53d6\u308a\u3068\u691c\u7d22\u306b\u306f\u3001\u69d8\u3005\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n \u3088\u308a\u8907\u96d1\u306a\u691c\u7d22\u6761\u4ef6\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u65b9\u6cd5\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n \u30c7\u30fc\u30bf\u306e\u66f4\u65b0\u3082 \u30c7\u30fc\u30bf\u306e\u524a\u9664\u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\npom.xml<\/code>\u306e\u4f8b\uff1a<\/p>\n\n\n\n<dependencies>\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter-data-jpa<\/artifactId>\n <\/dependency>\n <!-- H2\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408 -->\n <dependency>\n <groupId>com.h2database<\/groupId>\n <artifactId>h2<\/artifactId>\n <scope>runtime<\/scope>\n <\/dependency>\n<\/dependencies><\/pre>\n\n\n\n
2.2 application.properties\u306e\u8a2d\u5b9a<\/h2>\n\n\n\n
application.properties<\/code>\uff08\u307e\u305f\u306fapplication.yml<\/code>\uff09\u30d5\u30a1\u30a4\u30eb\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3084<\/p>\n\n\n\n# \u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\u8a2d\u5b9a\nspring.datasource.url=jdbc:mysql:\/\/localhost:3306\/mydb\nspring.datasource.username=root\nspring.datasource.password=password\n\n# JPA\/Hibernate\u8a2d\u5b9a\nspring.jpa.hibernate.ddl-auto=update\nspring.jpa.show-sql=true\nspring.jpa.properties.hibernate.format_sql=true\n\n# \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u56fa\u6709\u306e\u8a2d\u5b9a\uff08\u4f8b\uff1aMySQL\uff09\nspring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect<\/pre>\n\n\n\n
2.3 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306e\u8a2d\u5b9a<\/h2>\n\n\n\n
\n
spring.datasource.url=jdbc:h2:mem:testdb\n spring.datasource.driverClassName=org.h2.Driver<\/pre>\n\n\n\n
\n
spring.datasource.url=jdbc:mysql:\/\/localhost:3306\/mydb\n spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver<\/pre>\n\n\n\n
\n
spring.datasource.url=jdbc:postgresql:\/\/localhost:5432\/mydb\n spring.datasource.driverClassName=org.postgresql.Driver<\/pre>\n\n\n\n
\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u6ce8\u610f\u70b9<\/h2>\n\n\n\n
\n
application-dev.properties<\/code>, application-prod.properties<\/code>\uff09<\/li>\n\n\n\n\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h2>\n\n\n\n
\n
DEBUG<\/code>\u306b\u8a2d\u5b9a\u3057\u3066\u3001\u3088\u308a\u8a73\u7d30\u306a\u60c5\u5831\u3092\u5f97\u308b<\/li>\n<\/ol>\n\n\n\nlogging.level.org.springframework=DEBUG\nlogging.level.org.hibernate=DEBUG<\/pre>\n\n\n\n
3. \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u4f5c\u6210<\/h1>\n\n\n\n
3.1 JPA\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u5b9a\u7fa9<\/h2>\n\n\n\n
\n
@Entity<\/code>: \u30af\u30e9\u30b9\u304cJPA\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059<\/li>\n\n\n\n@Table<\/code>: \u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u540d\u3092\u6307\u5b9a\uff08\u7701\u7565\u53ef\u80fd\uff09<\/li>\n\n\n\n@Id<\/code>: \u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u3092\u6307\u5b9a<\/li>\n\n\n\n@GeneratedValue<\/code>: \u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u306e\u751f\u6210\u65b9\u6cd5\u3092\u6307\u5b9a<\/li>\n\n\n\n@Column<\/code>: \u30ab\u30e9\u30e0\u540d\u3084\u5236\u7d04\u3092\u6307\u5b9a\uff08\u7701\u7565\u53ef\u80fd\uff09<\/li>\n<\/ul>\n\n\n\nimport javax.persistence.*;\n\n@Entity\n@Table(name = \"users\")\npublic class User {\n @Id\n @GeneratedValue(strategy = GenerationType.IDENTITY)\n private Long id;\n\n @Column(nullable = false, unique = true)\n private String email;\n\n @Column(nullable = false)\n private String password;\n\n \/\/ \u30b2\u30c3\u30bf\u30fc\u3001\u30bb\u30c3\u30bf\u30fc\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u7b49\u306f\u7701\u7565\n}<\/pre>\n\n\n\n3.2 Spring Data JPA\u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u4f5c\u6210<\/h2>\n\n\n\n
JpaRepository<\/code>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u7d99\u627f\u3059\u308b\u3053\u3068\u3067\u3001\u57fa\u672c\u7684\u306aCRUD\u64cd\u4f5c\u304c\u81ea\u52d5\u7684\u306b\u63d0\u4f9b\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\nimport org.springframework.data.jpa.repository.JpaRepository;\nimport org.springframework.stereotype.Repository;\n\n@Repository\npublic interface UserRepository extends JpaRepository<User, Long> {\n \/\/ \u57fa\u672c\u7684\u306aCRUD\u64cd\u4f5c\u306f\u81ea\u52d5\u7684\u306b\u63d0\u4f9b\u3055\u308c\u307e\u3059\n \/\/ \u4f8b: save(), findById(), findAll(), delete()\n}<\/pre>\n\n\n\n3.3 \u30ab\u30b9\u30bf\u30e0\u30af\u30a8\u30ea\u306e\u5b9f\u88c5<\/h2>\n\n\n\n
\n
public interface UserRepository extends JpaRepository<User, Long> {\n User findByEmailAndPassword(String email, String password);\n }<\/pre>\n\n\n\n\n
@Query(\"SELECT u FROM User u WHERE u.email = :email AND u.active = true\")\n User findActiveUserByEmail(@Param(\"email\") String email);<\/pre>\n\n\n\n
\n
@Query(value = \"SELECT * FROM users WHERE created_at > :date\", nativeQuery = true)\n List<User> findUsersCreatedAfter(@Param(\"date\") Date date);<\/pre>\n\n\n\n
\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n
\n
\n
\n
@Query(\"SELECT u FROM User u JOIN FETCH u.roles WHERE u.id = :id\")\n User findUserWithRoles(@Param(\"id\") Long id);<\/pre>\n\n\n\n
\n
Page<User> findAll(Pageable pageable);<\/pre>\n\n\n\n
4. CRUD\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u88c5<\/h1>\n\n\n\n
4.1 \u30c7\u30fc\u30bf\u306e\u4f5c\u6210\u3068\u4fdd\u5b58<\/h2>\n\n\n\n
save()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n@Service\npublic class UserService {\n @Autowired\n private UserRepository userRepository;\n\n public User createUser(User user) {\n return userRepository.save(user);\n }\n}<\/pre>\n\n\n\nsaveAll()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\uff1a<\/p>\n\n\n\nList<User> users = Arrays.asList(new User(\"John\"), new User(\"Jane\"));\nList<User> savedUsers = userRepository.saveAll(users);<\/pre>\n\n\n\n
\n
4.2 \u30c7\u30fc\u30bf\u306e\u8aad\u307f\u53d6\u308a\u3068\u691c\u7d22<\/h2>\n\n\n\n
\u57fa\u672c\u7684\u306a\u691c\u7d22<\/h3>\n\n\n\n
\/\/ ID\u306b\u3088\u308b\u691c\u7d22\nOptional<User> user = userRepository.findById(1L);\n\n\/\/ \u5168\u4ef6\u53d6\u5f97\nList<User> allUsers = userRepository.findAll();\n\n\/\/ \u6761\u4ef6\u306b\u3088\u308b\u691c\u7d22\uff08\u30e1\u30bd\u30c3\u30c9\u540d\u304b\u3089\u81ea\u52d5\u751f\u6210\u3055\u308c\u308b\u30af\u30a8\u30ea\uff09\nList<User> activeUsers = userRepository.findByActiveTrue();<\/pre>\n\n\n\n
\u9ad8\u5ea6\u306a\u691c\u7d22<\/h3>\n\n\n\n
\n
public List<User> findUsersByComplexCriteria(String name, boolean active) {\n return userRepository.findAll((root, query, cb) -> {\n List<Predicate> predicates = new ArrayList<>();\n if (name != null) {\n predicates.add(cb.like(root.get(\"name\"), \"%\" + name + \"%\"));\n }\n predicates.add(cb.equal(root.get(\"active\"), active));\n return cb.and(predicates.toArray(new Predicate[0]));\n });\n }<\/pre>\n\n\n\n\n
User probe = new User();\n probe.setActive(true);\n probe.setEmail(\"example@email.com\");\n\n Example<User> example = Example.of(probe);\n List<User> users = userRepository.findAll(example);<\/pre>\n\n\n\n
\n
@Query(\"SELECT u FROM User u WHERE u.email LIKE :email AND u.active = :active\")\n List<User> findActiveUsersByEmailPattern(@Param(\"email\") String email, @Param(\"active\") boolean active);<\/pre>\n\n\n\n
4.3 \u30c7\u30fc\u30bf\u306e\u66f4\u65b0<\/h2>\n\n\n\n
save()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u65e2\u5b58\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u66f4\u65b0\u3059\u308b\u5834\u5408\u3001JPA\u306f\u66f4\u65b0\u64cd\u4f5c\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n@Service\npublic class UserService {\n @Autowired\n private UserRepository userRepository;\n\n public User updateUser(Long id, String newName) {\n User user = userRepository.findById(id)\n .orElseThrow(() -> new EntityNotFoundException(\"User not found\"));\n user.setName(newName);\n return userRepository.save(user);\n }\n}<\/pre>\n\n\n\n\n
@Entity\npublic class User {\n @Version\n private Long version;\n \/\/ \u305d\u306e\u4ed6\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\n}<\/pre>\n\n\n\n4.4 \u30c7\u30fc\u30bf\u306e\u524a\u9664<\/h2>\n\n\n\n
\/\/ ID\u306b\u3088\u308b\u524a\u9664\nuserRepository.deleteById(1L);\n\n\/\/ \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u3088\u308b\u524a\u9664\nUser user = userRepository.findById(1L).orElse(null);\nif (user != null) {\n userRepository.delete(user);\n}\n\n\/\/ \u5168\u4ef6\u524a\u9664\uff08\u6ce8\u610f\u3057\u3066\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\uff09\nuserRepository.deleteAll();<\/pre>\n\n\n\n\n
\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n
\n
@Transactional\n public void complexOperation() {\n \/\/ \u8907\u6570\u306e\u64cd\u4f5c\u3092\u30a2\u30c8\u30df\u30c3\u30af\u306b\u5b9f\u884c\n }<\/pre>\n\n\n\n\n