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iii
contents
foreword vii
preface ix
about this book xii
acknowledgments xv
1
Bootstarting Spring 1
1.1 Spring rebooted 2
Taking a fresh look at Spring 2
■
Examining Spring Boot
essentials 4
■
What Spring Boot isn’t 7
1.2 Getting started with Spring Boot 8
Installing the Spring Boot CLI 8
■
Initializing a Spring Boot
project with Spring Initializr 12
1.3 Summary 22
2
Developing your first Spring Boot application 23
2.1 Putting Spring Boot to work 24
Examining a newly initialized Spring Boot project 26
■
Dissecting
a Spring Boot project build 30
2.2 Using starter dependencies 33
Specifying facet-based dependencies 34
■
Overriding starter
transitive dependencies 35
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CONTENTS
iv
2.3 Using automatic configuration 37
Focusing on application functionality 37
■
Running the
application 43
■
What just happened? 45
2.4 Summary 48
3
Customizing configuration 49
3.1 Overriding Spring Boot auto-configuration 50
Securing the application 50
■
Creating a custom security
configuration 51
■
Taking another peek under the covers of
auto-configuration 55
3.2 Externalizing configuration with properties 57
Fine-tuning auto-configuration 58
■
Externally configuring
application beans 64
■
Configuring with profiles 69
3.3 Customizing application error pages 71
3.4 Summary 74
4
Testing with Spring Boot 76
4.1 Integration testing auto-configuration 77
4.2 Testing web applications 79
Mocking Spring MVC 80
■
Testing web security 83
4.3 Testing a running application 86
Starting the server on a random port 87
■
Testing HTML pages
with Selenium 88
4.4 Summary 90
5
Getting Groovy with the Spring Boot CLI 92
5.1 Developing a Spring Boot CLI application 93
Setting up the CLI project 93
■
Eliminating code noise with
Groovy 94
■
What just happened? 98
5.2 Grabbing dependencies 100
Overriding default dependency versions 101
■
Adding dependency
repositories 102
5.3 Running tests with the CLI 102
5.4 Creating a deployable artifact 105
5.5 Summary 106
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