This tutorial will walk you through the process of creating a simple Registration and Login Example with Spring Boot 2, Spring Security, Spring Data JPA, Hibernate 5, HSQL, JSP and Bootstrap.
If you are new to Spring Boot or Spring Data JPA, it would be best to try the following tutorials - Spring Boot Hello World Example with JSP - JPA/Hibernate Many To Many Bidirectional Relationship Mapping
What you'll build
Log in
Log out
Register account
Welcome
What you'll need
- JDK 8+ or OpenJDK 8+
- Maven 3+
Project structure
├── src
│ └── main
│ ├── java
│ │ └── com
│ │ └── hellokoding
│ │ └── auth
│ │ ├── model
│ │ │ ├── Role.java
│ │ │ └── User.java
│ │ ├── repository
│ │ │ ├── RoleRepository.java
│ │ │ └── UserRepository.java
│ │ ├── service
│ │ │ ├── SecurityServiceImpl.java
│ │ │ ├── SecurityService.java
│ │ │ ├── UserDetailsServiceImpl.java
│ │ │ ├── UserServiceImpl.java
│ │ │ └── UserService.java
│ │ ├── validator
│ │ │ └── UserValidator.java
│ │ ├── web
│ │ │ └── UserController.java
│ │ ├── WebApplication.java
│ │ └── WebSecurityConfig.java
│ ├── resources
│ │ ├── application.properties
│ │ └── validation.properties
│ └── webapp
│ ├── resources
│ │ ├── css
│ │ │ ├── bootstrap.min.css
│ │ │ └── common.css
│ │ └── js
│ │ └── bootstrap.min.js
│ ├── login.jsp
│ ├── registration.jsp
│ └── welcome.jsp
└── pom.xml
Project dependencies
Define JPA Entities
JPA Entity is defined with @Entity annotation, represent a table in your database.
@Table maps the entity with the table. If no @Table is defined, the default value is used: the class name of the entity.
@Id declares the identifier property of the entity.
@ManyToMany defines a many-to-many relationship between 2 entities.
mappedBy indicates the entity is the inverse of the relationship.
Spring Data JPA Repositories
Spring Data JPA contains some built-in Repository implemented common functions to work with database such as findOne, findAll and save
Spring Security's UserDetailsService
To implement login/authentication with Spring Security, we need to implement org.springframework.security.core.userdetails.UserDetailsService interface
Security Service
We create SecurityService to provide current logged-in user and auto login user after registration
User Service
Provide service for registering account
Spring Validator
To provide input-data validation for /registration controller with Spring Validator, we implement org.springframework.validation.Validator. Error codes, e.g. Size.userForm.username, are defined by validation.properties
Controllers
We don't define /login POST controller, it is provided by Spring Security
Properties
Web Security Configuration
Application Configurations
JSP View Templates with Bootstrap
Run with Maven
You can run the application using mvn clean spring-boot:run and visit to http://localhost:8080
Source code
See also
Spring Boot Course In Practice with Hands-On Experienced Tutorials and Examples Series