Introducing Spring Framework

Chapter 2 ■ Working with Classes and Dependencies
Figure 2-4. Spring Container/Dependency Injection
Figure 2-4 shows the Spring dependency injection container and its life cycle, using a configuration based on bean
definitions. This configuration can be via XML, as you did, or Java configuration annotations, or programmatically.
In the book’s companion source code, you can find the Groovy version of this chapter. You can run it using the
following command:
gradle run –Dtest.single=MyDocumentsGroovyTest test
Summary
In this chapter, you defined your first Spring application, called My Documents. This application will evolve over
the course of the entire book so you can experiment and add more features using the Spring Framework and its
extensions.
You saw the differences using plain Java and you added a Spring flavor to it; the Spring Framework will help you
to have a better object-oriented design, applying its dependency injection implementation.
In the next chapters, you will dive deeper into Spring and learn how to enhance your application. You will see how
to use collections, how to add some persistence, and how to expose your application on the web, and much more!
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