Registration and Login with Spring Boot + Spring Security + Thymeleaf

In this section, we will learn how to create user registration and login using Spring boot, Spring security, Thymeleaf, JPA, and H2DB. The GitHub repository link is provided at the end of this tutorial. You can download the source code.


Technologies used:

  • Spring Boot 2.5.5 
  • Spring Data JPA 
  • Spring Security 
  • Thymeleaf 
  • Maven 3+ 
  • Java 17 
  • H2 Database 

User Interface

User Registration


Authentication Failed


Authentication success


Sign out



Final Project Structure:



Complete pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
   https://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>2.5.5</version>
      <relativePath />
   </parent>
   <groupId>
        registration-login-spring-boot-security-thymeleaf
    </groupId>
   <artifactId>
        registration-login-spring-boot-security-thymeleaf
    </artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>
        registration-login-spring-boot-security-thymeleaf
    </name>
   <description>
        Demo project for Spring Boot Thymeleaf and RDBMS 
    </description>

   <properties>
      <java.version>17</java.version>
   </properties>

   <dependencies>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-data-jpa</artifactId>
      </dependency>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-security</artifactId>
      </dependency>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-thymeleaf</artifactId>
      </dependency>

      <dependency>
         <groupId>org.thymeleaf.extras</groupId>
         <artifactId>thymeleaf-extras-springsecurity5</artifactId>
      </dependency>
      <dependency>
         <groupId>com.h2database</groupId>
         <artifactId>h2</artifactId>
         <scope>runtime</scope>
      </dependency>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-web</artifactId>
      </dependency>

      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-devtools</artifactId>
         <scope>runtime</scope>
         <optional>true</optional>
      </dependency>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-test</artifactId>
         <scope>test</scope>
         <exclusions>
            <exclusion>
               <groupId>org.junit.vintage</groupId>
               <artifactId>junit-vintage-engine</artifactId>
            </exclusion>
         </exclusions>
      </dependency>
      <dependency>
         <groupId>org.springframework.security</groupId>
         <artifactId>spring-security-test</artifactId>
         <scope>test</scope>
      </dependency>
   </dependencies>

   <build>
      <plugins>
         <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
         </plugin>
      </plugins>
   </build>

</project>


Create Role Entity

package com.knf.dev.model;

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

@Entity
@Table(name = "role")
public class Role {

   @Id
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   private Long id;
   private String name;

   public Role() {

   }

   public Role(String name) {
      super();
      this.name = name;
   }

   public Long getId() {
      return id;
   }

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

   public String getName() {
      return name;
   }

   public void setName(String name) {
      this.name = name;
   }
}
The @Entity annotation specifies that the class is an entity and is mapped to a database table. The @Table annotation specifies the name of the database table to be used for mapping. The @Id annotation specifies the primary key of an entity and the @GeneratedValue provides for the specification of generation strategies for the values of primary keys. 


Create User Entity 

package com.knf.dev.model;

import java.util.Collection;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
import javax.persistence.JoinColumn;

@Entity
@Table(name = "user", uniqueConstraints = 
       @UniqueConstraint(columnNames = "email"))
public class User {

   @Id
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   private Long id;

   @Column(name = "first_name")
   private String firstName;

   @Column(name = "last_name")
   private String lastName;

   private String email;

   private String password;

   @ManyToMany(fetch = FetchType.EAGER, 
                   cascade = CascadeType.ALL)
   @JoinTable(name = "users_roles", 
       joinColumns = @JoinColumn(name = "user_id", 
         referencedColumnName = "id"), 
           inverseJoinColumns = @JoinColumn
              (name = "role_id", 
                 referencedColumnName = "id"))
   private Collection<Role> roles;

   public User() {

   }

   public User(String firstName, String lastName, 
         String email, String password, 
                   Collection<Role> roles) {
      
      this.firstName = firstName;
      this.lastName = lastName;
      this.email = email;
      this.password = password;
      this.roles = roles;
   }

   public Long getId() {
      return id;
   }

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

   public String getFirstName() {
      return firstName;
   }

   public void setFirstName(String firstName) {
      this.firstName = firstName;
   }

   public String getLastName() {
      return lastName;
   }

   public void setLastName(String lastName) {
      this.lastName = lastName;
   }

   public String getEmail() {
      return email;
   }

   public void setEmail(String email) {
      this.email = email;
   }

   public String getPassword() {
      return password;
   }

   public void setPassword(String password) {
      this.password = password;
   }

   public Collection<Role> getRoles() {
      return roles;
   }

   public void setRoles(Collection<Role> roles) {
      this.roles = roles;
   }
}
The @Entity annotation specifies that the class is an entity and is mapped to a database table. The @Table annotation specifies the name of the database table to be used for mapping. The @Id annotation specifies the primary key of an entity and the @GeneratedValue provides for the specification of generation strategies for the values of primary keys. The @Column annotation is used to specify the mapped column for a persistent property or field. If no Column annotation is specified, the default value will be applied. We use @ManyToMany annotation to create a many-to-many relationship between two entities. 
 

Create User Repository

package com.knf.dev.repository;

import org.springframework.data.jpa.repository.JpaRepository;
import com.knf.dev.model.User;

public interface UserRepository 
       extends JpaRepository<User, Long> {
   
   User findByEmail(String email);
}
JpaRepository is a JPA-specific extension of Repository. It contains an API for basic CRUD operations and also API for pagination and sorting. 


Create User Service

package com.knf.dev.service;

import java.util.List;
import org.springframework.security.core
                     .userdetails.UserDetailsService;
import com.knf.dev.dto.UserRegistrationDto;
import com.knf.dev.model.User;

public interface UserService 
             extends UserDetailsService {
   
   User save(UserRegistrationDto registrationDto);
   List<User> getAll();
}
The UserDetailsService interface is used to retrieve user-related data. It has one method named loadUserByUsername(). 


Create User Service Implementation

package com.knf.dev.service;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security
                .core.authority.SimpleGrantedAuthority;
import org.springframework.security
                .core.userdetails.UserDetails;
import org.springframework.security
                .core.userdetails.UsernameNotFoundException;
import org.springframework.security
                .crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;
import com.knf.dev.dto.UserRegistrationDto;
import com.knf.dev.model.Role;
import com.knf.dev.model.User;
import com.knf.dev.repository.UserRepository;

@Service
public class UserServiceImpl implements UserService {

   private UserRepository userRepository;

   @Autowired
   private BCryptPasswordEncoder passwordEncoder;

   public UserServiceImpl(UserRepository userRepository) {
      super();
      this.userRepository = userRepository;
   }

   @Override
   public User save(UserRegistrationDto registrationDto) {
      
      User user = new User(registrationDto.getFirstName(), 
                 registrationDto.getLastName(), 
                  registrationDto.getEmail(),
                   passwordEncoder.encode(registrationDto
                          .getPassword()), 
                   Arrays.asList(new Role("ROLE_USER")));

      return userRepository.save(user);
   }

   @Override
   public UserDetails loadUserByUsername(String username) 
         throws UsernameNotFoundException {

      User user = userRepository.findByEmail(username);
      if (user == null) {
         throw new UsernameNotFoundException
               ("Invalid username or password.");
      }
      return new org.springframework.security
            .core.userdetails.User(user.getEmail(), 
               user.getPassword(),
           mapRolesToAuthorities(user.getRoles()));
   }

   private Collection<? extends GrantedAuthority> 
          mapRolesToAuthorities(Collection<Role> roles) {
      
      return roles.stream()
            .map(role -> new SimpleGrantedAuthority
                  (role.getName()))
            .collect(Collectors.toList());
   }

   @Override
   public List<User> getAll() {
      
      return userRepository.findAll();
   }
}


Create User Registration DTO

package com.knf.dev.dto;

public class UserRegistrationDto {

   private String firstName;
   private String lastName;
   private String email;
   private String password;

   public UserRegistrationDto() {

   }

   public String getFirstName() {
      return firstName;
   }

   public void setFirstName(String firstName) {
      this.firstName = firstName;
   }

   public String getLastName() {
      return lastName;
   }

   public void setLastName(String lastName) {
      this.lastName = lastName;
   }

   public String getEmail() {
      return email;
   }

   public void setEmail(String email) {
      this.email = email;
   }

   public String getPassword() {
      return password;
   }

   public void setPassword(String password) {
      this.password = password;
   }
}


Create Security Configuration

package com.knf.dev.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security
    .authentication.dao.DaoAuthenticationProvider;
import org.springframework.security
    .config.annotation.authentication
        .builders.AuthenticationManagerBuilder;
import org.springframework.security
    .config.annotation.web.builders.HttpSecurity;
import org.springframework.security
    .config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security
    .config.annotation.web.configuration
      .WebSecurityConfigurerAdapter;
import org.springframework.security
    .crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security
    .web.util.matcher.AntPathRequestMatcher;

import com.knf.dev.service.UserService;

@Configuration
@EnableWebSecurity
public class SecurityConfiguration 
            extends WebSecurityConfigurerAdapter {

   @Autowired
   private UserService userService;

   @Bean
   public BCryptPasswordEncoder passwordEncoder() {
      
      return new BCryptPasswordEncoder();
   }

   @Bean
   public DaoAuthenticationProvider authenticationProvider() {
      
      DaoAuthenticationProvider auth = 
            new DaoAuthenticationProvider();
      auth.setUserDetailsService(userService);
      auth.setPasswordEncoder(passwordEncoder());
      return auth;
   }

   @Override
   protected void configure(AuthenticationManagerBuilder auth) 
          throws Exception {
      
      auth.authenticationProvider(authenticationProvider());
   }

   @Override
   protected void configure(HttpSecurity http) throws Exception {
      
      http.authorizeRequests().antMatchers
        ("/registration**", "/js/**", "/css/**", "/img/**")
          .permitAll().anyRequest().authenticated()
             .and().formLogin().loginPage("/login")
               .permitAll().and().logout().invalidateHttpSession
                 (true).clearAuthentication(true)
                    .logoutRequestMatcher
                      (new AntPathRequestMatcher("/logout"))
                        .logoutSuccessUrl("/login?logout")
            .permitAll();

   }
}


Create Home Controller

package com.knf.dev.web;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;

@Controller
public class HomeController {

   @GetMapping("/login")
   public String login() {
      return "login";
   }

   @GetMapping("/")
   public String home() {
      return "index";
   }
}


Create Registration Controller

package com.knf.dev.web;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import com.knf.dev.dto.UserRegistrationDto;
import com.knf.dev.service.UserService;

@Controller
@RequestMapping("/registration")
public class RegistrationController {

   private UserService userService;

   public RegistrationController(UserService userService) {
      super();
      this.userService = userService;
   }

   @ModelAttribute("user")
   public UserRegistrationDto userRegistrationDto() {
      return new UserRegistrationDto();
   }

   @GetMapping
   public String showRegistrationForm() {
      return "registration";
   }

   @PostMapping
   public String registerUserAccount(@ModelAttribute("user") 
                  UserRegistrationDto registrationDto) {
      
      userService.save(registrationDto);
      return "redirect:/registration?success";
   }
}


Spring Boot Main Driver

package com.knf.dev;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

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


View Layer

index.html

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.
             org/thymeleaf-extras-springsecurity3">

<head>
    <meta charset="ISO-8859-1">
    <title>Spring Security Demo</title>

    <link rel="stylesheet" 
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">

</head>
<style>
    .navbar {
        background-color: green;
    }
</style>

<body>
    <!-- create navigation bar ( header) -->
    <nav class="navbar navbar-inverse navbar-fixed-top">
        <div class="container">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle collapsed" 
                  data-toggle="collapse" data-target="#navbar"
                    aria-expanded="false" aria-controls="navbar">
                    <span class="sr-only">Toggle navigation</span>
                    <span class="icon-bar"></span>
            <span class="icon-bar"></span> <span class="icon-bar">
                    </span>
                </button>
                <a class="navbar-brand" href="#" th:href="@{/}">
                    Registration and
                    Login</a>
            </div>
            <div id="navbar" class="collapse navbar-collapse">
                <ul class="nav navbar-nav">
                    <li sec:authorize="isAuthenticated()">
                        <a th:href="@{/logout}">Logout</a>
                    </li>
                </ul>
            </div>
        </div>
    </nav>

    <br><br><br><br>
    <div class="container">
        <div class="alert alert-success">
            <strong>Success!</strong> Login Successful.
        </div>
    </div>
    <input type="hidden" th:name="${_csrf.parameterName}" 
        th:value="${_csrf.token}" />
</body>
</html>


login.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="ISO-8859-1">
    <title>Spring Security Demo</title>

 <link rel="stylesheet" 
  href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">

</head>
<style>
    .navbar {
        background-color: green;
    }
</style>

<body>

    <!-- create navigation bar ( header) -->
    <nav class="navbar navbar-inverse navbar-fixed-top">
        <div class="container">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle collapsed" 
                       data-toggle="collapse" data-target="#navbar"
                    aria-expanded="false" aria-controls="navbar">
                    <span class="sr-only">Toggle navigation</span> 
                        <span class="icon-bar"></span> <span
                     class="icon-bar"></span> <span class="icon-bar"></span>
                </button>
                <a class="navbar-brand" href="#" th:href="@{/}">
                 Registration and
                    Login</a>
            </div>
        </div>
    </nav>

    <br><br><br><br><br><br><br>
    <div class="container">
        <div class="row">
            <div class="col-md-6 col-md-offset-3">

                <h1>User Login Page</h1>
                <form th:action="@{/login}" method="post">

                    <!-- error message -->
                    <div th:if="${param.error}">
                        <div class="alert alert-danger">Invalid username or
                            password.</div>
                    </div>

                    <!-- logout message -->
                    <div th:if="${param.logout}">
                        <div class="alert alert-info">
                         You have been logged out.</div>
                    </div>

                    <div class="form-group">
                        <label for="username"> Username </label> : 
                   <input type="text" class="form-control" id="username"
                            name="username" placeholder="Enter Email ID" 
                           autofocus="autofocus">
                    </div>

                    <div class="form-group">
                        <label for="password">Password</label>: 
                  <input type="password" id="password" name="password"
                            class="form-control" placeholder="Enter Password" />
                    </div>

                    <div class="form-group">
                        <div class="row">
                            <div class="col-sm-6 col-sm-offset-3">
                                <input type="submit" name="login-submit" 
                                       id="login-submit"
                                    class="form-control btn btn-primary" 
                                        value="Log In" />
                            </div>
                        </div>
                    </div>
                </form>
                <div class="form-group">
                    <span>New user? <a href="/" th:href="@{/registration}">
                Register
                  here</a></span>
                </div>
            </div>
        </div>
    </div>
</body>
</html>


registration.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="ISO-8859-1">
    <title>Spring Security Demo</title>
<link rel="stylesheet" 
 href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">

</head>
<style>
    .navbar {
        background-color: green;
    }
</style>

<body>

    <!-- create navigation bar ( header) -->
    <nav class="navbar navbar-inverse navbar-fixed-top">
        <div class="container">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle collapsed" 
                       data-toggle="collapse" data-target="#navbar"
                    aria-expanded="false" aria-controls="navbar">
                    <span class="sr-only">Toggle navigation</span> 
                                <span class="icon-bar"></span> <span
                        class="icon-bar"></span> <span class="icon-bar"></span>
                </button>
                <a class="navbar-brand" href="#" th:href="@{/}">
                               Registration and
                    Login </a>
            </div>
        </div>
    </nav>

    <br><br><br><br><br><br><br>
    <!-- Create HTML registration form -->
    <div class="container">
        <div class="row">
            <div class="col-md-6 col-md-offset-3">

                <!-- success message -->
                <div th:if="${param.success}">
                  <div class="alert alert-info">You've successfully registered
                        to our awesome app!</div>
                </div>

                <h1>Registration</h1>

                <form th:action="@{/registration}" method="post" 
                             th:object="${user}">
                    <div class="form-group">
                        <label class="control-label" for="firstName"> 
                           First Name </label>
                        <input id="firstName" class="form-control" 
                                 th:field="*{firstName}" required
                            autofocus="autofocus" />
                    </div>

                    <div class="form-group">
                        <label class="control-label" for="lastName"> 
                                    Last Name </label> <input id="lastName"
                            class="form-control" th:field="*{lastName}" 
                                   required autofocus="autofocus" />
                    </div>

                    <div class="form-group">
                        <label class="control-label" for="email"> Email 
                         </label> <input id="email" class="form-control"
                          th:field="*{email}" required autofocus="autofocus" 
                                />
                    </div>

                    <div class="form-group">
                        <label class="control-label" for="password"> 
                           Password </label> <input id="password"
                            class="form-control" type="password" 
                          th:field="*{password}" required
                            autofocus="autofocus" />
                    </div>

                    <div class="form-group">
                        <button type="submit" class="btn btn-primary">
                          Register</button>
                        <span>Already registered? <a href="/" 
                  th:href="@{/login}">Login
                                here</a></span>
                    </div>
                </form>
            </div>
        </div>
    </div>
</body>
</html>


Download the complete source code - click here                                     

Local Setup and Run the application


Step 1: Download or clone the source code from GitHub to a local machine - Click here


Step 2: mvn clean install


Step 3: Run the Spring Boot application - mvn spring-boot:run

From the browser call the endpoint http://localhost:8080/


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Top 5 Java ORM tools - 2024

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  The term ORM refers to object-relational mapping, which uses objects to adapt programming languages to database systems while allowing them to function with SQL and object-oriented programming ideas. Any kind of database management system that can accomplish object mapping to the table in the virtual system is suitable for the implementation of ORM. Java has a wide variety of ORM tools, some of which are mentioned below: 1. Hibernate Hibernate is a lightweight, open-source, non-invasive Java ORM (Object-Relational Mapping) framework that allows developers to create objects that function independently of database software and create persistence logic in any Java or JavaEE application. It offers an abstraction layer, so developers don't have to bother about implementations; Hibernate handles these tasks internally, such as connecting to databases and creating queries to carry out CRUD operations, among other things. Persistence logic development is done with it. Persistence logic r
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Java - Blowfish Encryption and decryption Example

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Blowfish is an encryption method developed by Bruce Schneier in 1993 as an alternative to the DES encryption method. It is significantly faster than DES and provides good encryption speed, although no effective cryptanalysis technique has been found to date. It is one of the first secure block ciphers that is not protected by any patents and is therefore freely available for anyone to use. This is a symmetric block cipher algorithm. Block size: 64 bits Key size: variable size from 32 to 448 bits number of subsections: 18 [P-array] number of rounds: 16 number of substitution blocks: 4 [each with 512 records of 32 bits each] develop  Example 1: Encryption and decryption using Blowfish import java.io.UnsupportedEncodingException; import java.nio.charset.Charset; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import java.util.Base64; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeExc
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Spring boot video streaming example-HTML5

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Hello everyone, Today we will learn how to stream MP4 video using Spring Boot and Spring Web Flux.  The Source code download link is provided at the end of this post. New, Quarkus Practice User Interface   Project Structure: G radle(build.gradle) plugins { id 'org.springframework.boot' version '2.5.4' id 'io.spring.dependency-management' version '1.0.11.RELEASE' id 'java' } group = 'com.knf.demo' version = '0.0.1-SNAPSHOT' sourceCompatibility = '11' repositories { mavenCentral() } dependencies { implementation 'org.springframework.boot:spring-boot-starter-webflux' testImplementation 'org.springframework.boot:spring-boot-starter-test' testImplementation 'io.projectreactor:reactor-test' } test { useJUnitPlatform() } Service (VideoStreamingService.java) package  com.knf.demo.service ; import org.springframework.beans.factory.annotation. Autowired ; import org.springframework
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Google Cloud Storage + Spring Boot - File Upload, Download, and Delete

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In this section, we will learn  how to  create a simple spring boot application to perform different file operations such as upload, download, list, and delete files from the Google Cloud Storage. 1.  A little bit of Background Google Cloud Storage Cloud Storage is a managed service for storing unstructured data. Store any amount of data and retrieve it as often as you like. More Info - click here! Spring Boot Spring Boot makes it easy to create stand-alone, production-grade Spring-based Applications that you can "just run".  More Info - click here! 2. Create a GCP Project First, Sign into the Google console at  https://console.cloud.google.com . You can create a new project by first selecting the project dropdown in the top left and selecting " New Project ". Next, specify your GCP  Project name  and  Project ID . Then  Click on the " CREATE " button. Copy " Project ID " and keep it for future purposes. 3. Create a Google Cloud Storage bucket Fr
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