Spring Boot Hibernate configuration example

Spring Boot Hibernate configuration example

Learn to configure hibernate/JPA support in Spring Boot2 applications, along with creating entity classes and extending inbuilt JpaRepository interfaces.

Learn to configure hibernate/JPA support in Spring Boot2 applications, along with creating entity classes and extending inbuilt JpaRepository interfaces.

1. Maven Dependencies

In this example, we are using maven to add runtime jars in project. If you are using gradle then please find related dependencies.


<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
        <relativePath /> <!-- lookup parent from repository -->
    <description>Demo project for Spring Boot</description>







  • spring-boot-starter-data-jpa (required) : It includes spring data, hibernate, HikariCP, JPA API, JPA Implementation (default is hibernate), JDBC and other required libraries.
  • h2 : Though we can add any database easily using datasource properties in application.properties file, we are using h2 database in reduce unnecessary complexity.

    2. Create JPA entity classes

After we have included required jars in classpath, create few entity classes as per project needs. We are here creating one such entity EmployeeEntity for example purpose.

Remember to include only JPA API annotations (javax.persistence.*) to decouple hibernate from application code.


import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

public class EmployeeEntity {

    private Long id;

    private String firstName;

    private String lastName;

    @Column(name="email", nullable=false, length=200)
    private String email;

    //Setters and getters left out for brevity.

    public String toString() {
        return "EmployeeEntity [id=" + id + ", firstName=" + firstName +
                ", lastName=" + lastName + ", email=" + email   + "]";
  • We do not need to do anything to make this class scannable. Spring boot will look for all @Entity annotated classes and configure them by default as JPA entities.
  • By default the name of the table is the name of entity class e.g. in above case it shall be EmployeeEntity. We can customize the table name using @Table annotation and it’s name attribute.
  • The id property is annotated with @Id so that JPA will recognize it as the object’s ID. Also, @GeneratedValue annotation enable its value generated automatically.
  • To customize the name of columns, null value allowed or size of column etc. use @Column annotation.
  • I will suggest to override toString() method to print employee’s basic details in logs.

    3. Create JPA Repository

Extend <a href="https://docs.spring.io/spring-data/jpa/docs/current/api/org/springframework/data/jpa/repository/JpaRepository.html" target="_blank">JpaRepository</a> interface to allows to create repository implementations automatically, at runtime, for any given entity class. The types of entity class and it’s ID field are specified in the generic parameters on JpaRepository.


import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import com.howtodoinjava.demo.entity.EmployeeEntity;

public interface EmployeeRepository extends JpaRepository<EmployeeEntity, Long> {


By this simple extension, EmployeeRepository inherits several methods for working with Employee persistence, including methods for saving, deleting, and finding Employee entities.

Along with default provided methods, we can add our own custom methods and queries to this interface.

4. Properties Configuration

4.1. Data source

Provide the datasource connection properties in application.properties file which will help in connecting the database to JPA code.

In given config, we are configuring h2 database.



# Enabling H2 Console

# Custom H2 Console URL

4.2. Hibernate print SQL and Logging

A good way to see how the components are working – is to enable extensive logging. Do it when it’s too easy using only few properties entries.


#Turn Statistics on and log SQL stmts


#If want to see very extensive logging

4.3. Database Initialization

In a JPA-based applications, we can either choose to let Hibernate create the schema using entity classes or use schema.sql, but we cannot do both.

Make sure to disable spring.jpa.hibernate.ddl-auto if using schema.sql.


#Schema will be created using schema.sql and data.sql files




    first_name VARCHAR(250) NOT NULL,
    last_name VARCHAR(250) NOT NULL,


    (first_name, last_name, email)
    ('Lokesh', 'Gupta', '[email protected]'),
    ('Deja', 'Vu', '[email protected]'),
    ('Caption', 'America', '[email protected]');

5. Spring boot hibernate demo

To test hibernate configuration with Spring boot, we need to autowire the EmployeeRepository dependency in a class and use it’s method to save or fetch employee entities.

Let’s do this testing in @SpringBootApplication annotated class and using <a href="https://howtodoinjava.com/spring-boot/command-line-runner-interface-example/" target="_blank">CommandLineRunner</a> interface. The run() method from CommandLineRunner is executed immediately after the application startup.


package com.howtodoinjava.demo;

import java.util.Optional;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import com.howtodoinjava.demo.entity.EmployeeEntity;
import com.howtodoinjava.demo.repository.EmployeeRepository;

public class SpringBoot2DemoApplication implements CommandLineRunner {

    private Logger logger = LoggerFactory.getLogger(this.getClass());

    EmployeeRepository repository;

    public static void main(String[] args) {
        SpringApplication.run(SpringBoot2DemoApplication.class, args);

    public void run(String... args) throws Exception
        Optional<EmployeeEntity> emp = repository.findById(2L);

        logger.info("Employee id 2 -> {}", emp.get());

Run the application and observe the output. Please note that to print limited information in logs, I am using property logging.pattern.console=%m%n in application


Tomcat initialized with port(s): 8080 (http)
Starting service [Tomcat]
Starting Servlet engine: [Apache Tomcat/9.0.19]
Initializing Spring embedded WebApplicationContext
Root WebApplicationContext: initialization completed in 5748 ms

HikariPool-1 - Starting...
HikariPool-1 - Start completed.
HHH000204: Processing PersistenceUnitInfo [
    name: default
HHH000412: Hibernate Core {5.3.10.Final}
HHH000206: hibernate.properties not found
HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
HHH000400: Using dialect: org.hibernate.dialect.H2Dialect

Initialized JPA EntityManagerFactory for persistence unit 'default'
Initializing ExecutorService 'applicationTaskExecutor'
spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. 
Explicitly configure spring.jpa.open-in-view to disable this warning
Tomcat started on port(s): 8080 (http) with context path ''
Started SpringBoot2DemoApplication in 17.638 seconds (JVM running for 19.1)

        employeeen0_.id as id1_0_0_,
        employeeen0_.email as email2_0_0_,
        employeeen0_.first_name as first_na3_0_0_,
        employeeen0_.last_name as last_nam4_0_0_
        tbl_employees employeeen0_

Employee id 2 -> EmployeeEntity [id=2, firstName=Deja, lastName=Vu, [email protected]]

Clearly, hibernate has been configured and we are able to interact with database using JPA repository interface.

Drop me your questions in comments sections related to configuring hibernate with spring boot.

Sourcecode download

spring-boot hibernate java

Bootstrap 5 Complete Course with Examples

Bootstrap 5 Tutorial - Bootstrap 5 Crash Course for Beginners

Nest.JS Tutorial for Beginners

Hello Vue 3: A First Look at Vue 3 and the Composition API

Building a simple Applications with Vue 3

Deno Crash Course: Explore Deno and Create a full REST API with Deno

How to Build a Real-time Chat App with Deno and WebSockets

Convert HTML to Markdown Online

HTML entity encoder decoder Online

Learn Hibernate and Spring for Beginners (Includes Spring Boot)

Spring 5: Learn Spring 5 Core, AOP, Spring MVC, Spring Security, Spring REST, Spring Boot 2, Thymeleaf, JPA & Hibernate

How to Install OpenJDK 11 on CentOS 8

What is OpenJDK? OpenJDk or Open Java Development Kit is a free, open-source framework of the Java Platform, Standard Edition (or Java SE).

Java Spring Boot First App

Step by Step to your First Spring App

Spring Boot Tutorials - Spring Boot Full Course

Spring Boot Tutorials | Full Course - What is Spring? Spring Boot is an open source Java-based framework used to create a Micro Service. Spring Boot contains a comprehensive infrastructure support for developing a micro service and enables you to develop enterprise-ready applications that you can “just run”.

Top 10 Advanced Java and Spring Boot Courses for Full-Stack Java Developers

These are best online courses to learn Spring Boot, Advanced Java, Docker, React, Microservices, DEvops, and Angular to become full stack Java developer.