Spring Boot, Thymeleaf, Hibernate, JPA, Maven, and MySQL Database

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In this tutorial, we will learn how to develop a Spring MVC web application using Spring Boot, Thymeleaf, Hibernate, JPA, Maven, and MySQL database.

What we’ll build

We are building a simple Spring MVC web application using Thymeleaf as a view.
Output: HTML page using Thymeleaf which displays a list of users from MySQL database.

1. Create Spring Boot Project

There are many ways to create a Spring Boot application. The simplest way is to use Spring Initializr at http://start.spring.io/, which is an online Spring Boot application generator.

2. Maven Dependencies

Add below Maven dependencies to your Spring Boot project:

        <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
        </dependency>

3. Packaging Structure

Here is the project structure for your reference:

4. Create a JPA Entity - User

Let's create a User JPA entity with the following content into it:

import jakarta.persistence.*;

@Entity
@Table(name = "user")
public class User
{
    @Id 
    @GeneratedValue(strategy=GenerationType.AUTO)
    private Integer id;
    private String name;
 
    public User()
    {
    }

    public User(Integer id, String name)
    {
         this.id = id;
         this.name = name;
    }

    public Integer getId()
    {
        return id;
    }

    public void setId(Integer id)
    {
        this.id = id;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }
}

5. Create Spring Data JPA Repository - UserRepository

Let's create UserRepository interface that extends JpaRepository interface:

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

public interface UserRepository extends JpaRepository<User, Integer>
{

}

6. Create Spring Controller - HomeController

Let's create HomeController Spring MVC controller with home() handler method that returns index Thyemelaf view:

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HomeController
{
    @Autowired UserRepository userRepo;
 
    @RequestMapping("/")
    public String home(Model model)
    {
        model.addAttribute("users", userRepo.findAll());
        return "index";
    }
}

7. Configuring MySQL Database

Configure application.properties to connect to your MySQL database. 

Let's open an application.properties file and add the following database configuration to it.

logging.level.org.springframework=INFO

################### DataSource Configuration ##########################
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/users_database
spring.datasource.username=root
spring.datasource.password=root

################### Hibernate Configuration ##########################

spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true

message.properties

Create a message.properties under the resources folder and add the following content to it - 

app.title=SpringMVC JPA Demo (With SpringBoot)

8. Insert SQL Script

Once you will run this application will create users table in a database and use the below insert SQL script to populate a few records in a users table.

INSERT INTO `users_database`.`user` (`id`, `name`) VALUES ('1', 'Salman');
INSERT INTO `users_database`.`user` (`id`, `name`) VALUES ('2', 'SRK');
INSERT INTO `users_database`.`user` (`id`, `name`) VALUES ('3', 'AMIR');
INSERT INTO `users_database`.`user` (`id`, `name`) VALUES ('4', 'Tiger');
INSERT INTO `users_database`.`user` (`id`, `name`) VALUES ('5', 'Prabhas');

9. Create a Thymeleaf View - index.html

Let's create a Thymeleaf view to show the list of users. Locate the index.html file under src/main/resources/templates folder of this project.

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" 
   xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="utf-8"/>
<title>Home</title>
</head>
<body>
 <h2 th:text="#{app.title}">App Title</h2>
    <table>
        <thead>
         <tr>
           <th>Id</th>
           <th>Name</th>
        </tr>
        </thead>
        <tbody>
          <tr th:each="user : ${users}">
             <td th:text="${user.id}">Id</td>
             <td th:text="${user.name}">Name</td>
          </tr>
        </tbody>
    </table>
 </body>
</html>

10. Running the Application

Now run Spring boot application and hit this link in the browser: http://localhost:8080/
You will see below HTML page on the screen:

11. Source code on GitHub

The source code of this tutorial is available on my GitHub Repository.

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