spring-boot-master-class

Spring Boot Master Class

Understand and love the power of Spring Boot - All its features are illustrated developing a web application managing todos and a basic API for survey questionnaire. Also covers unit testing, mocking and integration testing.

Installing Tools

Our Recommendations

• Use latest version of Java
• Use latest version of "Eclipse IDE for Enterprise Java Developers" or Intellij Community Edition
• Remember: Spring Boot 3+ or 4+ works only with Java 17+

Installing Java

• Windows - https://www.youtube.com/watch?v=I0SBRWVS0ok
• Linux - https://www.youtube.com/watch?v=mHvFpyHK97A
• Mac - https://www.youtube.com/watch?v=U3kTdMPlgsY

Troubleshooting

• Troubleshooting Java Installation - https://www.youtube.com/watch?v=UI_PabQ1YB0

Installing Eclipse

• Windows - https://www.youtube.com/watch?v=toY06tsME-M
• Others - https://www.youtube.com/watch?v=XveQ9Gq41UM

Troubleshooting

• Configuring Java in Eclipse - https://www.youtube.com/watch?v=8i0r_fcE3L0

Introduction

Spring Boot has a lot of magic going for it.

Developing applications with it is cool and fun.

Spring Boot makes it easy to create stand-alone, production-grade Spring based Applications that you can “just run”. Most Spring Boot applications need very little Spring configuration.

In this course, you will learn the cool things about Spring Boot and Spring Boot Starter Projects. We will develop

• A web application to manage your todos
• A basic REST Service to manage questions of a survey

You will learn about Spring Boot step by step - in more than 90 steps. This course would be a perfect first step as an introduction to Spring Boot.

Here is a quick overview of different sections of the course:

• Introduction to Spring in 10 Steps
• Introduction to the power of Spring Boot in 10 Steps
• Develop a Todo Management Web Application in 30 Steps
• Introduction to Unit Testing with JUnit in 5 Steps
• Introduction to Mocking with Mockito in 5 Steps
• Advanced Features of Spring Boot in 25 Steps - We learn these developing a simple API for managing survey questionnaire.
• Introduction to JPA in 10 Steps
• Connecting our Todo Management Web Application to JPA

You will be using REST Services, Spring (Dependency Management), Spring MVC, Spring Boot, Spring Security (Authentication and Authorization), BootStrap (Styling Pages), Maven (dependencies management), Eclipse (IDE) and Tomcat Embedded Web Server. We will help you set up each one of these.

You will learn about

• Basics of Spring Boot
• Basics of Auto Configuration and Spring Boot Magic
• Spring Boot Starter Projects
• Spring Initializr
• DispatcherServlet
• Basic Todo Management Application with Login/Logout
• Model, Controllers, ViewResolver and Filters
• Forms - DataBinding, Validation
• Annotation based approach - @RequestParam, @ModelAttribute, @SessionAttributes etc
• Bootstrap to style the page
• Basic REST Services using Spring Boot Starter Web
• REST Service Content Negotiation with JSON and XML
• Embedded servlet containers : Tomcat, Jetty and Undertow
• Writing Unit and Integration tests using Spring Boot Starter Test
• Profiles and Dynamic Configuration with Spring Boot
• Spring Boot Data JPA
• Spring Boot Actuator
• Spring Security
• Spring Boot Developer Tools and LiveReload

Goals

• Provide quick start for projects with Spring.
• Be opinionated but provide options.
• Provide a range of non-functional features that are common to large classes of projects (e.g. embedded servers, security, metrics, health checks, externalized configuration).
• Absolutely no code generation and no requirement for XML configuration.

4.0.0 Spring Boot Upgrade

RECOMMENDED SPRING BOOT VERSION

	org.springframework.boot
	spring-boot-starter-parent
	4.0.0

REST API

Github Folder - https://github.com/in28minutes/spring-boot-master-class/blob/master/05.Spring-Boot-Advanced

Final Code - https://github.com/in28minutes/spring-boot-master-class/blob/master/05.Spring-Boot-Advanced/2-3-1-upgrade.md

Commit - https://github.com/in28minutes/spring-boot-master-class/commit/362dde4914be0dfdf222eb5ec360808ff29a3bc4

New Code

    org.springframework.security
    spring-security-test
    test

@RunWith(SpringRunner.class)
@WebMvcTest(value = SurveyController.class)
@WithMockUser
public class SurveyControllerTest {

Old Code

@RunWith(SpringRunner.class)
@WebMvcTest(value = SurveyController.class, secure = false)
public class SurveyControllerTest {

Web Application

Github Folder - https://github.com/in28minutes/spring-boot-master-class/blob/master/02.Spring-Boot-Web-Application/

Final Code - https://github.com/in28minutes/spring-boot-master-class/blob/master/02.Spring-Boot-Web-Application/2-3-1-upgrade.md

Commit - https://github.com/in28minutes/spring-boot-master-class/commit/362dde4914be0dfdf222eb5ec360808ff29a3bc4

Add this in pom.xml

New Code

	org.springframework.boot
	spring-boot-starter-validation

Commit - https://github.com/in28minutes/spring-boot-master-class/commit/e1fcbe1e6599708a0a7ba3698f1e84eebfe1756b

TodoController.java

• deleteTodo - Use repository.deleteById(id); instead of repository.delete(id);
• showUpdateTodoPage - Use Todo todo = repository.findById(id).get(); instead of Todo todo = repository.findOne(id);
• todo.jsp - Use modelAttribute instead of commandName

New Code

auth.inMemoryAuthentication()
            .passwordEncoder(NoOpPasswordEncoder.getInstance())
        		.withUser("in28Minutes").password("dummy")

Old Code

auth.inMemoryAuthentication().withUser("in28Minutes").password("dummy")

Step Wise Details

Refer each steps

Expectations

• You should know Java. You should understand usage of Annotations.
• A basic understanding of Spring is a bonus but NOT mandatory. We have seperate sections to introduce Spring.
• A basic understanding of JPA, Spring Security will be useful.
• You are NOT expected to have any experience with Eclipse or Maven.
• We will help you install Eclipse and get up and running with Maven.

Running Examples

• Download the zip or clone the Git repository.
• Unzip the zip file (if you downloaded one)
• Open Command Prompt and Change directory (cd) to folder containing pom.xml
• Open Eclipse
  • File -> Import -> Existing Maven Project -> Navigate to the folder where you unzipped the zip
  • Select the right project
• Choose the Spring Boot Application file (search for @SpringBootApplication)
• Right Click on the file and Run as Java Application
• You are all Set
• For help : use our installation guide - https://www.youtube.com/playlist?list=PLBBog2r6uMCSmMVTW_QmDLyASBvovyAO3

Notes

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Troubleshooting

• Refer our TroubleShooting Guide - https://github.com/in28minutes/in28minutes-initiatives/tree/master/The-in28Minutes-TroubleshootingGuide-And-FAQ

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