How do you link tables in Hibernate via Java Spring?

Asked by Last Modified  

2 Answers

Learn Java

Follow 2
Answer

Please enter your answer

Rajesh Kumar N

"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 { ...
read more
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
Comments
Dislike Bookmark

Online Mathematics tutor with 8 years experience(Online Classes for 10th to 12th)

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...
read more
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
Comments
Dislike Bookmark

Related Questions

Hi sir, I'm confused between .net and java. What to choose for a career. I have little bit knowledge of asp.net. Please guide me for this. Thank you
Hello Kirit, The application which were devloped about 2 decades back was mostly coded in java and so you will see so many of the application (in several company and outside) written in java. .Net(collectively...
Kirit
Where can I get Python online training?
You can get many institutes in google which are providing online training.
Taranum
Who invented Java language?
James Gosling invented java language
Niranjan
Why Java Laguage is not provided get method into Iterator? is there any specific reson.
1) Iterator is an Interface. 2) It's sole purpose is to iterate not save value. POJO's have getters and setters.
Niraj Raj
What equipment do you need to teach online Java classes?
Team Viewer is the best tool for the same.
Imran
0 0
5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

jOOQ 3.10 Supports JPA Attribute Converter
One of the cooler hidden features in jOOQ is the JPADatabase, which allows for reverse engineering a pre-existing set of JPA-annotated entities to generate jOOQ code. For instance, you could write these...

Hasnain

3 0
0
Importance of Constructor's Visibility.
While developing program or implementing Singleton pattern we have learnt to mention constructor as private and known reason is -> to blocked its direct call from outside of class. But did we think...

Milan M.

0 0
0
Introduction to Course Content
Video about what we are going to learn throughout the Java Training Session .

Jtcindia Java Training Center

0 0
0
Inheritance In Java
Inheritance: The process of getting properties and behaviors from one class to another class is called inheritance. Properties: Variables Behaviors: Methods The main purpose of the inheritance...
D

Deleted U.

1 0
0
1.3. Find the second largest element in an array.
public class Main { public static void main(String args) { int arr = {1, 3, 4, 6, 5}; int max = Integer.MIN_VALUE, secondMax = Integer.MIN_VALUE; for (int i = 0; i < arr.length; i++) { if (arr >...

Vivek J.

0 0
0

Recommended Articles

Java: An Object-Oriented Language

Java is the most commonly used popular programming language for the creation of web applications and platform today. Integrated Cloud Applications and Platform Services Oracle says, “Java developers worldwide has over 9 million and runs approximately 3 billion mobile phones”.  Right from its first implication as java 1.0...

Read full article >

Some Popular IT Courses in Current Market

In the domain of Information Technology, there is always a lot to learn and implement. However, some technologies have a relatively higher demand than the rest of the others. So here are some popular IT courses for the present and upcoming future: Cloud Computing Cloud Computing is a computing technique which is used...

Read full article >

Why Should You Learn Java !

Java is the most famous programming language till date. 20 years is a big time for any programming language to survive and gain strength. Java has been proved to be one of the most reliable programming languages for networked computers. source:techcentral.com Java was developed to pertain over the Internet. Over...

Read full article >

Top 5 Reasons to Learn JavaScript

Before we start on the importance of learning JavaScript, let’s start with a short introduction on the topic. JavaScript is the most popular programming language in the world, precisely it is the language - for Computers, the Web, Servers, Smart Phone, Laptops, Mobiles, Tablets and more. And if you are a beginner or planning...

Read full article >

Find Java Training Classes near you
Java Training Classes in Bangalore
Java Training Classes in Hyderabad
Java Training Classes in Pune
Java Training Classes in Chennai
Java Training Classes in Delhi
Java Training Classes in Mumbai
Java Training Classes in Kolkata
Java Training Classes in Noida
Java Training Classes in Gurgaon
Java Training Classes in Ghaziabad
Online Java Training

Looking for Java Training Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you