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Java > Learn Java > How do you link tables in Hibernate via Java Spring?
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How do you link tables in Hibernate via Java Spring?

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"Rajesh Kumar N: Guiding Young Minds from 1 to 12 with Expertise and Care"

Linking Tables in Hibernate (Spring Boot) 1. Use JPA Annotations: @OneToOne – One-to-One mapping @OneToMany / @ManyToOne – Parent-child relationship @ManyToMany – Join tables 2. Example: One-To-Many (User → Posts) @Entity public class User { ...
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Linking Tables in Hibernate (Spring Boot) 1. Use JPA Annotations: @OneToOne – One-to-One mapping @OneToMany / @ManyToOne – Parent-child relationship @ManyToMany – Join tables 2. Example: One-To-Many (User → Posts) @Entity public class User { @Id @GeneratedValue private Long id; private String name; @OneToMany(mappedBy = "user", cascade = CascadeType.ALL) private List<Post> posts; } @Entity public class Post { @Id @GeneratedValue private Long id; private String content; @ManyToOne @JoinColumn(name = "user_id") private User user; } 3. Repository & Service: Use JpaRepository<User, Long> to handle DB operations. Save parent (User), Hibernate handles child (Post). Would you like help with a specific mapping? read less
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Linking Tables in Hibernate (Spring Boot) 1. Use JPA Annotations: @OneToOne -- One-to-One mapping @OneToMany / @ManyToOne -- Parent-child relationship @ManyToMany -- Join tables 2. Example: One-To-Many (User → Posts) @Entity public class User { @Id @GeneratedValue private Long...
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Linking Tables in Hibernate (Spring Boot) 1. Use JPA Annotations: @OneToOne – One-to-One mapping @OneToMany / @ManyToOne – Parent-child relationship @ManyToMany – Join tables 2. Example: One-To-Many (User → Posts) @Entity public class User { @Id @GeneratedValue private Long id; private String name; @OneToMany(mappedBy = "user", cascade = CascadeType.ALL) private List posts; } @Entity public class Post { @Id @GeneratedValue private Long id; private String content; @ManyToOne @JoinColumn(name = "user_id") private User user; } 3. Repository & Service: Use JpaRepository to handle DB operations. Save parent (User), Hibernate handles child (Post read less
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