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Index
Title Page Copyright and Credits
Spring Boot 2 Fundamentals
Packt Upsell
Why Subscribe? Packt.com
Contributors
About the Authors Packt Is Searching for Authors Like You
Preface
Who This Book Is For What This Book Covers To Get the Most out of This Book
Download the Example Code Files Conventions Used
Get in Touch
Reviews
The Spring Project and Framework
Introduction to the Spring Framework
A Short History Spring Key Principles J2EE Pain Points Spring as a Counterpart for J2EE Inversion of Control and Dependency Injection Inversion of Control and Dependency Injection Overview The Spring Framework The Spring Ecosystem Spring Boot Features
Bootstrapping
Spring Initializr
Creating the First Spring Initializr Project Examining the Project in the IDE Running a Project with Different Options
The Application Context
Spring Bean Spring Bean Stereotypes
Exploring Spring Beans
Configuration Classes Classpath Scanning
Additional Tools – Project Lombok
Java Beans Java Class Example Class Project Lombok to the Rescue Project Lombok Enhanced Class Activity: Project Lombok in Action
Summary
Building a Spring Application
Dependency Injection in Spring
Autowiring Injection Types Field Injection Property Injection Config Method Injection Constructor Injection Circular Dependencies Qualify Beans Bean Scopes Configuration Classes
Utilizing Bean Interdependencies
Configuration of Spring Boot Applications
Profiles Conditional Beans
Utilizing Conditional Beans for Various Implementations
Spring Configuration Files Property Files YAML Files Multi-Profile YAML Files External Configuration Locations Placeholders in Configuration Files Accessing Environment Values Annotated Fields Spring Expression Language Configuration Property Classes Activity: Examining Autowiring and Configurations
Summary
Testing Spring Applications
Applying Unit Tests
Unit Testing Test Types – Side by Side Writing Unit Tests with Plain JUnits Writing Unit Tests with Mockito Support
Creating Unit Tests
Integration Tests
The @SpringBootTest Annotation Testing Beans Configuring the Test Context Activity: Writing Integration Tests
Summary
The MVC Pattern
Introducing the MVC Pattern
The MVC Components Comparing Model, View, and Controller Interacting Advantages and Disadvantages of the MVC Pattern Request-Based versus Component-Based MVC
Spring Web MVC Basics
Single-Page Applications Versus Multi-Page Applications SPA versus MPA Java Servlet API Servlet API Components Spring Web MVC
Utilizing Spring Web MVC Starter
The Embedded Web Server Spring DispatcherServlet DispatcherServlet Interaction Controller as Components Static Views with HTML and Assets Adding Client-Side Web Libraries Through WebJars
Styling with Bootstrap
Transforming the Template Engine Thymeleaf Snippet Passing Data Along with Models
Spring Web MVC Controller
The @RequestMapping Annotation Additional Annotations and Parameters for Handler Methods @RequestParam @RequestHeader @CookieValue @PathVariable @ModelAttribute @RequestBody @ResponseBody Additional Content – Properties to Configure Web MVC Filter Configuring Spring Web MVC Activity: Creating Your First Web MVC Controller
Summary
Displaying Information Using Web Pages
HTML Templating with Thymeleaf
Templating Engine Integrating Thymeleaf Into a Spring Boot Application A Basic Thymeleaf Template Externalizing Text Create Context Aware URLs Statements in Thymeleaf Templates
Bootstrapping and Templating With Thymeleaf
Displaying Data Using a Model and Data Binding
How Spring Web MVC Handles the Model Model-View Interaction Passing the Model as a Parameter to a Handler Method Returning Model Attributes from a Controller Method Using @ModelAttribute to Initialize Model Attributes How a View is Selected by the Spring Framework Selecting a View Template by Returning Its Name Redirecting to a URL Instead of Rendering a View Directly Selecting a View and Returning a Model at the Same Time Working with the Model in Thymeleaf Templates Binding Model Data to a Thymeleaf Template
Adding Dynamic Data
Iterating and Displaying Items from a List
Handling Lists
Displaying Parts of the View Using Conditions
Displaying Text Conditionally
Activity: Displaying the Details of a Blog Post
Summary
Passing Data Between the View and the Controller
Form Handling
HTML Forms Post Data Handling Creating a Form Template Simple Input Field
Implementing Thymeleaf Form Syntax
Form-Backing Beans Populating a Form Bean for Editing
Starting with Form Data Processing
Bean Validation Adding Validation Messages to Templates
Utilizing Spring's Validation Facilities
Customizing Validation Messages Setting a New Default Message for a Validator Setting the Message for a Bean Property Providing Translation for Messages
Modifying Validation Messages
Form Input Types and Value Binding
Inputting Elements for Text or Number (text, hidden, password) Inputting Elements for Selections (Checkbox, Radio) Input Elements for User Interaction (submit) Select (single, multi-select) Selecting Multiple Values Textarea (Regular, Unsafe Content) Safe/Unsafe Text
Utilizing Checkboxes in Thymeleaf
Activity: Creating a Page to Enter a New Blog Post Category
Summary
RESTful APIs
What is a RESTful API?
REST – Formal Definition The RESTful API – Practitioner's Definition Showing the Yes/No API in Postman REST Guiding Principles REST Resource Examples
Utilizing SWAPI
REST Controllers in Spring What makes a REST Controller Different? "Response Body" in Detail Returning JSON Manually Manual JSON, Correct Content-Type Mapping Data to JSON REST Controllers in Spring
Implementing REST Endpoints 
Content Types Producing Different Content Types
Responding with XML to the Rest-intro Application
Job Aid Consuming Different Content Types HTTP Status Code and Important Headers Declarative Status Code Programmatic Status Code Global Error Handling A JavaScript Evaluator Advising Many Controllers at Once Controlling Headers
Returning Different Status Codes
Hypermedia with Spring Boot
HATEOAS Introduction Extending an Application with Spring HATEOAS
Creating a HATEOAS Resource
Activity: Creating a List of Blog Articles as a REST Resource
Summary
Web Application Security
Securing Your Web Application
Threats to Software Security Interpreting Untrusted Data Injection Insecure Deserialization Allowing Access from Foreign Clients Allowing Access to Resources Not Owned Insufficient Logging and Monitoring Authentication and Authorization Authentication Authorization
Examining Baby-step Security (1)
Spring Security
The Magic of Auto-Configured Spring Security Tight Spring Security Defaults Securing REST with Basic Auth Securing Web Browsing in the Session
Examining Baby-step Security (2)
Explicit Configuration Security Configuration Entry Point Adding Hardcoded Users Locking Paths with Basic Auth Adding a Login Adding a Logout
Exploring Web Security
Method-Level Security Roles Allowed Enable @RolesAllowed Securing Controllers The Original @Secured Method Expression-Based Security Simple Expressions Powerful Expressions Beyond Access – Filtering Testing Security Aspects The Security Context A Real User Repository Password Encoders Wiring it Together Real Repositories Cross-Site Request Forgery (CSRF) Cross-Origin Resource Sharing (CORS) Activity: Exploring Security Annotations
Summary
Persisting Data Using a Database
Relational Databases and SQL
Relational Database Management Systems (RDBMS) The H2 Embedded Database
Utilizing the H2 Console
The Gist of SQL DDL Table Creation DML Data Manipulation
Accessing the Database from Java with JDBC and JdbcTemplate
Importing Initial Data Plain JDBC Plain JDBC Examples Plain JDBC Since Java 7 JDBC Resources to Handle Spring to the Rescue – JdbcTemplate In detail: Creating the JdbcTemplate Exception Translation Advanced Queries Other Result Types Returning Multiple Values Returning Structured Data Mapping Rows Mapping Rows (short) Advanced Mapping: Row-Spanning CRUD Operations
Schema Updates
Database Migrations with Flyway
Utilizing Flyway
Flyway – Behind the Scenes Non-Trivial Migrations
Outlook – Advanced Database Support
External Databases Connection Pooling Other Database Technologies – JPA and Spring Data Other Database Technologies – jOOQ Activity: Creating an SMS Application to Display Multiple Authors
Summary Book Summary
Solutions
Chapter 1: The Spring Project and Framework
Activity: Project Lombok in Action
Chapter 2: Building a Spring Application
Activity: Autowiring and Configurations
Chapter 3: Testing Spring Applications
Activity: Writing Integration Tests
Chapter 4: The MVC Pattern
Activity: Create Your First Web MVC Controller
Chapter 5: Displaying Information Using Web Pages
Activity: Displaying the Details of a Blog-Post
Chapter 6: Passing Data Between the View and the Controller
Activity: Creating a Page to Enter a New Blog Post
Chapter 7: RESTful APIs
Activity: Creating a List of Blog Articles as a REST Resource
Chapter 8: Web Application Security
Activity: Exploring Security Annotations
Chapter 9: Persisting Data Using a Database
Activity: Creating an SMS Application to Display Multiple Authors
Solutions Summary
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