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

Why we are using this keyword in Java?
to access current object
Kiran
0 0
View Comments9
What is the difference between a C program execution and a Java program execution?
When we compile C program then it convert into exe file ie Machine language with the help of OS lib file which is platform dependent . If we compile java prgram then it convert into class file with the...
Kaushal
0 0
View Comments5
Which two are valid constructors for Thread? Thread(Runnable r, String name) Thread() Thread(int priority) Thread(Runnable r, ThreadGroup g) Thread(Runnable r, int priority) A. 1 and 3 B. 2 and 4 C. 1 and 2 D. 2 and 5
C
Srikanth
Between Java and Python, which one is better to learn first and why?
Both the development programs come with their strong suits. While Java allows you to enjoy the cross-platform support, Python helps you execute on at least ten different operating systems. It would help...
Priyanka
0 0
View Comments5
How do I learn Java? From book or internet or a coaching?
According to me....u should start from basic Java..that is core Java... . Find coaching , who teaches Java for beginners.....then later u can go for advance java.
Suresh
0 0
View Comments7

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

Ask a Question

Related Lessons

Migration from other languages to Salesforce
Anyone can easily migrate from other language to Salesforce. People must have skills to understand business logic.

Ramakrisnna Reddy G

0 1
View Comments0
Comparable vs Comparator
java.lang.Comparable java.util.Comparator For comparing some other object with its own object. Ex. I am comparing myself to some other employee. Method signature is: int compareTo (T object). For...

Vivek R.

1 0
View Comments0
Use of Service Locator Pattern
If we want to reuse the java code that should be the best approach w.r.t re-usability, maintanence and saving time to concentrate on our own businbess logic/requirement. In the similar approach many patterns...

Milan M.

0 0
View Comments0
History Of Java
Java history is interesting to know. The history of java starts from Green Team. Java team members (also known as Green Team), initiated a revolutionary task to develop a language for digital devices such...

Venkatakrishna

0 0
View Comments0
Java Overview
Java platform overview Java platform components The Java platform consists of the following components. The Java language Like any programming language, the Java language has its own structure, syntax...
A

Akshay Shende

0 0
View Comments0

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