Spring Web Essentials
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Spring Web Essentials

Building modern web services with Spring Boot

About the Book

If you want to learn how to develop modern web applications with Spring, this book is for you. Part one covers using Spring to power secure, industrial-grade web services ready to support modern web applications built with Hypertext Markup Language (HTML) and JavaScript such as Angular, React, and Vue. In part two, we develop a more traditional server-side HTML web application.

Why this book and not some other Spring book on the market?

The first version of Spring came out in 2003 when Java lacked many of the capabilities that make it a great language today, like generics, annotations, and variable arguments. As the language brought more natural ways of doing things, Spring improved to take advantage of them. Strong backward compatibility is one of the five major design philosophies of Spring, but it also means there are new, older, and much older ways of doing things. Documenting all of them makes for thick books. 

Second, older books don't cover the magic that is Spring Boot, which significantly simplifies configuring and running Spring applications. It's no longer an arduous task to get a Spring application up and running, so why should you learn how to do lots of unnecessary work? Finally, newer books cover Spring boot but often lack the level of detail needed to deploy real applications to production, including unit tests, bean validation, and security. This book presents a complete example leaving you ready to work on industrial-grade Spring applications.

As a teacher, my reading assignments often had a longer list of what to skip than what to read. I wrote this book to use in the classroom with a focus on current best practices covering what students need to know. We follow a test-driven, standards-based approach. The text is full of links to documentation and reference information for each new concept presented.

About the Author

Jeffrey Allen Anderson
Jeffrey Allen Anderson

For as long as he can remember, Jeff has been fascinated by gadgets. His all-time favorite Christmas gift was a Science Fair 100 in 1 Kit, because, with each project he tried, he learned more about how electronic components work together to make something useful. 

The knowledge he gained building "space-age" electronics in the 1970s set him on his path as a lifelong author, student, teacher, enterprise IT architect, software developer, and data geek. He is an Amazon Web Services (AWS) Academy Accredited Instructor and holds three AWS certifications: Cloud Practitioner, Solutions Architect Associate, and Security Specialty. When he logs out, he loves motorcycle riding, camping, traveling, and racing.

His career spans four decades in many roles, including developer, lead developer, application architect, infrastructure architect, data architect, and, most recently, educator. In the early days, his favorite programming language was Pascal and, most recently, Go. He will always have a soft spot in his heart for Java. He wrote his first Java program in 1997 and spent the next fifteen years using it to develop websites, web services, and other software for a Fortune 100 company. Now, he teaches Java for Columbus State Community College. 

Table of Contents

  •  
    • 1 Introduction
      • Foreword
      • Who should read this book?
      • What you will need
      • About the author
      • Acknowledgements
      • Opt-in to get updates
  • Part One: Web Services For The Modern Age
    • 2 Getting started
      • Create a new Maven project using Spring Initializr
      • Extract and open the project
      • Make sure you can run your new application
      • A closer look at the Maven Project Object Model (POM) file
      • A closer look at the main Java application class
      • A closer look at the JUnit test class
      • Git committed!
      • Accomplishments
    • 3 Some context
      • Web services
      • Representational State Transfer (REST)
      • More about HTTP
    • 4 Our first application programming interface (API)
      • The OpenAPI specification
      • Why are specs important?
      • The SpankinFresh blog API specification
      • Create a new blog posting
      • Return a Location header
      • Accomplishments
    • 5 Adding an object model
      • Updated OpenAPI specification
      • Create a blog post domain class
      • Incorporate the BlogPost class into our API
      • Accomplishments
    • 6 Adding a database
      • Add the project dependencies:
      • Creating an integration test
      • Constructing a proper location header
      • Testing for a nonzero ID
      • Convert BlogPost into an @Entity:
      • Create a Spring JPA repository:
      • Using our new JPA repository
      • Have the controller automatically set the datePosted
      • How the new dependency affects our controller
      • Test your changes with Postman
      • Accomplishments
    • 7 Testing with mocks
      • Configure our new class for mocking
      • Using our mock bean
      • Improving our test
      • Accomplishments
    • 8 Putting the RUD in CRUD
      • Get all articles
      • Get an article by ID
      • Update an existing article
      • Delete an existing article
      • Accomplishments:
    • 9 Property validation
      • Add the project dependencies:
      • Add bean validation constraints to BlogPost
      • Test that validation errors result in a bad request status
      • Update the controller to run validation
      • Testing with Postman
      • Customizing the validation errors response
      • Accomplishments
    • 10 Spring Profiles and external databases
      • Setting up PostgreSQL
      • Configuring Spring to use PostgreSQL
      • Add PostgreSQL to our maven dependencies
      • Create a PostgreSQL profile configuration
      • Run our application using the Postgres profile
      • Testing persistence after a restart
      • Viewing our data in DBeaver
      • Adding more realistic sample data
      • Accomplishments
    • 11 Connecting a Single Page Application (SPA)
      • Getting our front-end running
      • Adding CORS support
      • Customizing the API for our web front end
      • Using JdbcTempate to generate the table of contents
      • Enabling Browse by Category in the navigation bar
      • Getting articles for specific category working
      • Accomplishments
    • 12 More on JPA entity relationships
      • Add an Author entity bean
      • Add an Author JPA repository interface
      • Add a controller and unit tests
      • Relating Author to BlogPost
      • Fixing our blog post tests
      • Adding an Author controller
      • Requiring blog posts to have an author
      • Testing in Postman
      • Checking our changes in the web application
      • Adding more realistic sample data
      • Accomplishments
    • 13 Securing our API
      • Before we begin
      • Spring Security Primer
      • OAuth and OpenID Connect Primer
      • Testing API security
      • Integrate Okta OIDC and OAuth2 into our web app
      • Getting our unit tests running
      • Disabling our integration tests
      • Testing with Postman
      • Test the secure version of our web application against the secure Spring application
      • Accomplishments
  • Part Two: Server-side Websites with Spring
    • 14 More about models and views
      • Models
      • Views
      • Adding our Maven dependencies
      • Adding our first test
      • Getting our first test working
      • Viewing our work using a web browser
      • Adding model data
      • Using model data in our view
      • Accomplishments
    • 15 Improving our welcome page
      • Adding blog articles to our welcome page
      • Styling our website
      • Rendering the content as Markdown
      • Accomplishments
    • 16 Finishing our website
      • Providing a list of category names
      • Table of contents
      • Displaying the “All Articles” page
      • A bit of refactoring
      • Show articles by category name
      • Show article by ID
      • Accomplishments
    • 17 Administering authors and content
      • Coming soon!
    • 18 Securing our administration screens
      • Coming soon!
  • Notes

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