The Java Hibernate Developer Reading List (6 Books That Matter)

Hibernate is one of the most popular, open-source ORM (Object Relational Mapping) framework, which has now become a standard for developing persistence layer on Java enterprise application, along with JPA (Java Persistence API). I often receive requests to suggest which book is best to learn to hibernate or recommendation about some good books and training courses on Spring and Hibernate. This motivates me to write this article about some of the best books on Hibernate currently available on the market.

Top 7 Spring and Hibernate Training Courses for Java JEE Programmers in 2025 - Best of Lot

Spring and Hibernate are two of the hottest and most in-demand web frameworks in the Java world and also two of the most essential skill for any Java programmer to get a job in the web development space. The Spring framework is in around 2004 and established itself as the leading framework to develop Java applications both in core Java and web development areas. The Spring framework comes with a lot of modules to support different kinds of developments like Spring Security to address the security requirements of most web and enterprise Java applications. It supports single sign-on, LDAP authentication, Role-based access control, and much more such essential features. Spring also supports the development of REST services which is now become a standard way to provide web services.

Top 6 Hibernate Books for Java Developers in 2025 - Best, Must read

Hibernate is one of the most popular, open-source ORM (Object Relational Mapping) framework, which has now become a standard for developing persistence layer on Java enterprise application, along with JPA (Java Persistence API). I often receive requests to suggest which book is best to learn to hibernate or recommendation about some good books and training courses on Spring and Hibernate. This motivates me to write this article about some of the best books on Hibernate currently available on the market.

Top 8 Courses to Learn Hibernate and JPA in 2025 - Best of Lot

Hibernate is one of the essential frameworks for Java and Java EE or JEE programmers, especially if you are working on the server-side of a Java Web development project. It's an ORM tool or a framework that allows you to deal with only objects while Hibernate takes care of your data on your behalf. For example, instead of writing classes with SQL to load, save, and update data using the DAO design pattern, you can simply use the Hibernate framework in your project. It will allow you to deal with just objects while it will load, save, and update data in the background. It's also one of the top Java frameworks in my list of top 10 Java frameworks Programmers can learn.

Dealing with org.hibernate.LazyInitializationException: could not initialize proxy - no Session in Hibernate Java

If you are working in the Hibernate framework, then you know that one of the key features of Hibernate is "lazy initialization", which allows the framework to lazily initialize dependencies, relationships, or associations lazily from the database on a need basis. For example, if you are dealing with a User object, which has a relationship with a Permission object like one user can have multiple permissions, then Hibernate may choose not to initialize the collection which holds all permissions at the time it initialized User object and instead returns a proxy object.

How to fix org.hibernate.MappingException: Unknown entity Exception in Java? Solution

If you have used Hibernate with JPA and using annotation to declare your entity bean then you might have seen this confusing error called "org.hibernate.MappingException: Unknown entity". This error message is so misleading that you could easily lose anywhere between a few minutes to a few hours looking at the wrong places. I was using Spring 3 and Hibernate 3.6 when I got this error, which occurs when addEntity() method was executed. I checked everything, from Spring configuration file applicationContext.xml, Hibernate config file, my Entity class, and DAO class to see whether my Entity class is annotated or not, but I was still getting this error message.

Why JPA Entity or Hibernate Persistence Class Should Not be Final? Answer

One of the interesting hibernate interview questions is, why you should not make a Hibernate persistent class final? I'll try to answer this question in this short blog post. The use of proxies is the core feature of Hibernate (one of the most popular ORM frameworks for Java Projects) for implementing key performance features e.g. lazy loading and lazy associations fetching. In order to use a proxy in place of a real class, your hibernate persistence class must be either non-final or the implementation of an interface that declares all of the public methods. 

10 Difference between Hibernate and JDBC in Java

JDBC is the core technology to access database from Java application but it require lot of boiler plate coding. Hibernate on the other hand an ORM (Object Relational Mapping) framework, which automatically map Java object to tables and records in database. You don't need to execute query to populate objects, Hibernate will do that for you. It also provides several benefit as compared to JDBC e.g. performance improvement via Proxy, lazy loading of associations and Caching, that's why both enterprise Java application and web application uses Hibernate to implement the DAO layer of application.

Top 50 Hibernate and JPA Interview Questions Answers for 3 to 5 Years Experienced Java developers

Hello guys, if you are preparing for Java developer interview then apart  from preparing core Java questions like Collections, Multithreading, Serialization, and Data Structures you should also prepare Spring Boot and Hibernate interview questions. Both Spring and Hibernate are two of the essential frameworks in Java world and its expected from an experienced Java developer to know them. I have given more than 50 interview in my career and in most of them I have seen questions from both Spring and Hibernate, especially on the jobs where Hibernate and Spring Framework is mentioned as required skills. 

What is lazy loading in Hibernate? Lazy vs Eager loading Example

Lazy loading in Hibernate is a feature which allows Hibernate to load the dependent objects lazily to improve performance of Java application. By default Hibernate does eager or aggressive loading for single valued associations (many to one and one-to-one ) and lazy loading for collection-valued associations (one to many or many-to-many). If you set the loading to lazy=false or FetchType.EAGER then object will be eagerly loader, means when an object is loaded from database all its relationship and associated objects are also loaded from Database e.g. when an Author entity object is initialized then all the books written by this author will also be loaded into memory.

What is N+1 SELECT Problem in Hibernate? Strategies to avoid this?

In some cases while using Hibernate for object-relational mapping, you will encounter the N+ 1 select problem. That is, Hibernate will execute (n+1) queries to populate a list of records of size n, I mean 5 SELECT queries will be required to populate 4 records. This happens when each object contains reference of another object which needs to be populated. For example, suppose you have list of authors and you want to print out title of books written by each other. A naive ORM will first do a SELECT query to load all authors and then execute another N SELECT query to load book for each author. That's your N + 1 SELECT problem because it involves N+1 database roundtrips'. There are some mechanisms suggested by Hibernate that can be used to mitigate this risk e.g. EAGER fetching mode.

Top 10 Hibernate Interview Questions and Answers for 3 to 5 Years Experienced Java Developers

Hibernate Interview Questions are asked on Java J2EE Interviews, mostly for web-based enterprise application development roles. The success and acceptability of Hibernate framework on the Java world have made it one of the most popular Objects Relational Mapping (ORM) solutions in the Java technology stack. Hibernate frees you from database-specific coding and allows you to focus more on utilizing powerful object-oriented design principles to implement core business logic. By using Hibernate you can switch between databases rather easily and also take advantage of out-of-box caching facilities provided by Hibernate, in terms of second-level cache and query cache.

How to Fix NullPointerException due to Space in HQL named queries in Hibernate? Example

If you are using Hibernate for implementing the persistence layer in Java and JEE application from a couple of years then you would have seen this notorious NullPointerException while executing HQL named queries, Exception in thread “main” java.lang.NullPointerException at org.hibernate.hql.ast.ParameterTranslationsImpl .getNamedParameterExpectedType (ParameterTranslationsImpl.java:63).  Hibernate has some poor logging in case of Exception, which has caused me hours to debug a simple problem. By looking at NullPointerException below (look full stack trace below), I had no clue that it's coming because of a missing space on the HQL (Hibernate Query language) query. 

Difference between JPA, Hibernate, and MyBatis in Java

Hello guys are you tired of using plain old SQL to access your database? Are you looking for a better way to manage your database interactions in Java? Well, you're in luck because JPA, Hibernate, and MyBatis are here to save the day! If you're a Java developer, you've likely come across the terms JPA, Hibernate, and MyBatis when working with databases. While they all deal with object-relational mapping (ORM), they have their own distinct approaches and features. Understanding the differences between them can help you make informed decisions when choosing which one to use for your projects.

Difference between First and Second Level Cache in Hibernate [Answer]

If you have used Hibernate in past then you know that one of the strongest points of the Hibernate framework is caching, which can drastically improve the performance of the Java application's persistence layer if configured and used correctly. Hibernate provides caching at many levels e.g. first level cache at Session level, second-level cache at the SessionFactory level, and query cache to cache frequently executed SQL queries. The first level cache minimizes database access for the same object. For example, if you call the get() method to access Employee object with id = 1 from one session, it will go to the database and load the object into memory, but it will also cache the object in the first-level cache.

Difference between get and load in Hibernate

get vs load in Hibernate

Difference between get and load method in Hibernate is one of the most popular questions asked in Hibernate and spring interviews. Hibernate Session class provides two methods to access object e.g. session.get() and session.load() both looked quite similar to each other but there are subtle differences between load and get method which can affect the performance of the application. The main difference between get() vs load method is that get() involves database hit if an object doesn't exist in Session Cache and returns a fully initialized object which may involve several database calls while load method can return proxy in place and only initialize the object or hit the database if any method other than getId() is called on persistent or entity object.

Difference between save vs persist and saveOrUpdate in Hibernate

Save vs. saveOrUpdate vs. persist in Hibernate

What is the difference between save and saveOrUpdate or Difference between saving and persist are common interview question in any Hibernate interview, much like the difference between get and load method in Hibernate. Hibernate Session class provides a couple of ways to save an object into the database by methods like save, saveOrUpdate, and persist.  You can use either save(),  saveOrUpdate() or persist() based upon your requirement for persisting objects into the database. The key thing is that all these objects are used to store data into the database but they also make a transient object persistent in Hibernate.

Spring Boot + Hibernate Tutorial and Example for Java Developers

Hello guys, if you want to learn how to use Spring Boot and Hibernate together in a Java application and look for examples and tutorials then you have come to the right place. In the past, I have shared how to use Spring Boot with MyBatis and Spring Boot + Redis example and In this article on Spring Boot, we will discuss how to integrate Spring Boot with Hibernate. We will build a simple Spring Boot application and use Hibernate to store the data. So first, let's look at what is Hibernate in Java? Hibernate framework provides an abstraction layer which means programmers need not worry about implementation. Hibernate will implement different modules for developers internally like writing queries to perform CRUD operations on the database and establishing connections to different kinds of databases. This is a Java-based solution for object-relational mapping.

Difference between Transient, Persistent, and Detached Objects in Hibernate

In the Hibernate framework, an entity can be in three states, transient, persistent, and detached. When an object is in a transient state, it is commonly referred to as a transient object, similarly, if it is in persistence and detached state, it is known as a persistent and detached object. When an entity is first created using the new operator like new User() and not associated with Hibernate session like you haven't called session.save(user) method then it is known as a transient object. At this stage, Hibernate doesn't know anything about this object and the object doesn't have any representation in the database like a corresponding row in the User table.

How to use instanceof operator in Java with example

The instanceof operator in Java is used to check if an object belongs to a particular type or not at runtime. It's also a built-in keyword in Java programming language and is mostly used to avoid ClassCastException in Java. It is used as a safety check before casting any object into a certain type. This operator has a form of object instanceof Type and returns true if the object satisfies IS-A relationship with the Type i.e. object is an instance of class Type or object is the instance of a class which extends Type or object is an instance of a class which implements interface Type.