All applications need to execute queries to retrieve data from their database. With JPA and Hibernate, you can write JPQL, native SQL queries or Criteria Queries and you can use all of them with Spring Data JPA. In most cases, Spring Data just makes it a little bit easier. Spring Data JPA acts as a…
Many-to-Many associations are one of the most commonly used associations with JPA and Hibernate. You can find lots of examples for them in the real world, and you can map them with JPA and Hibernate as a uni- or bidirectional association in your domain model. But you probably also know that these mappings provide several…
Hibernate Tips is a series of posts in which I describe a quick and easy solution for common Hibernate questions. If you have a question for a future Hibernate Tip, please post a comment below. Question: One of my entity attributes shall not be null. There seem to be 2 different ways to ensure that….
Hibernate Tips is a series of posts in which I describe a quick and easy solution for common Hibernate questions. If you have a question for a future Hibernate Tip, please post a comment below. Question: A few days ago, I got an interesting question from one of my Advanced Hibernate Online Training students. He…
When you implement a new application, you should focus on the business logic instead of technical complexity and boilerplate code. That’s why the Java Persistence API (JPA) specification and Spring Data JPA are extremely popular. JPA handles most of the complexity of JDBC-based database access and object-relational mappings. On top of that, Spring Data JPA…
