Explore Spring Boot

Table of Contents

1. Spring Overview
2. Spring Core
3. Spring JPA (Hibernate)
4. Spring Rest
5. Spring Security
6. Spring MVC
7. Spring MVC CRUD
8. Spring Security MVC
9. Spring JPA Advanced

Spring Overview

• Make the server load automatically using dev-tools.
• Add basic spring security with specified username & password.
• Add actuator endpoints, exclude some, change prefix path.
• Add some information into "info" endpoint.
• Add custom properties, Edit some spring boot properties.
• Create simple rest controller to handle requests.

Spring Core

• Implement dependency injection with constructor, setter, field injection.
  • with java annotation configuration, @Autowired, @Component.
• Configure @SpringBootApplication to add further packages in component scanning process.
• Handle dependency injection process in case of multiple dependencies available.
  • using @Qualifier, @Primary
• Change bean scope of TennisPlayer bean and display it's influence using 'check' endpoint.
• Add initialization and destruction methods to CricketCoach bean.
• Configure spring container using Java-Based configuration (swimCoach bean).

Spring JPA Hibernate

• Connect to a database.
• Use CommandLineRunner bean.
• Create an entity class Student.
• Create an DAO class StudentDAO.
• Do CRUD (Create, Read, Update, Delete) operations.
  • write some specific queries for CRUD operations.
  • use Named Parameters in queries.
• Create database table automatically from our app.
  • using create value in application.properties file.
  • !Warning! everytime you run the app, tables dropped then created.

Spring Rest

How to design a REST API to handle database operations (CRUD).

• Setup database and connect to it.
• Create Employee POJO class and prepare it as entity.
• Implement Employee DAO & Service.
• Create Rest API controller to handle employee operations.
• Make specific Exception and handle it using global exception.
• Create the same project using JpaRepository, Spring Data Rest techniques.
• Configure and explore some Spring Data Rest properties and features.
  • Pagination, Sorting, Resource name.

Spring Security

Handling Authentication and Authorization process with help of spring security framework.

• Implement previous section again using JpaRepository with services (not provided in previous sections).
• Enable spring security by inject spring-security dependency.
  • change default username and password in application.properties file.
• Configure authentication with define users credentials (In Memory).
• Configure Authorization using SecurityFilterChain.
• Configure authentication with define users credentials (In Database).
  • Auto database access.
  • Customize database access.
• Use Bcrypt algorithm in storing user password.

Spring MVC

Implement MVC application with Thymeleaf template engine.

• Create MVC controller to handle client requests.
• Add Thymeleaf template engine dependency to can use with spring MVC.
• Apply some local CSS in our project.
• Perform lifecycle of form process.
  • create method handles client request.
  • create method handle form confirmation.
  • create two html files, one to show form, second to show confirm information.
  • use Model as data container.
  • create Student class to save returned data in submission form request.
  • know annotations like @ModelAttribute,@RequestParam.
• Practice several form inputs.
  • text, checkbox, radio, select.
  • avoid hard coding values with help of properties file.
• Do some data validation.
  • required fields, number range, regular expressions.
  • use @InitBinder to handle request parameters before binding process.
  • handle passing string to integer field errors.
  • Write validation error messages outside the code in messages.properties file.
• Do custom validation.

Spring MVC CRUD

• Reuse EmployeeService & EmployeeRepository from previous projects.
• Add css bootstrap styles from internet.
• Create a logic to get all employees.
• Create a logic to add an employee.
• Create a logic to update an employee.
• Create a logic to delete an employee.
• Add some validation rules.
• Sort results based on first name.
• Make index page redirect to employees/list url.

Spring Security MVC

We implement same things in previous security section with new things.

• Create custom login form.
• Show login error messages.
• Add logout feature to the app.
• Display username and roles.
• Restrict access based on roles.
• Display content based on roles.
• Create custom access denied page.

Spring JPA Advanced

• Implement one-to-one relation.
  • Bi-directional.
  • Uni-directional.
• Cascade operations.
• Implement Many-to-one relation.
• Implement Many-to-Many relation.
• Manipulate with fetch types (Lazy and Eager).