Final answer:
Spring supports several forms of dependency injection, including Constructor Injection, Setter Injection, and Field Injection, each with its specific use cases and advantages.
Step-by-step explanation:
Forms of Dependency Injection Supported by Spring
The Spring framework supports several forms of dependency injection, which allows for the creation of loosely coupled and easily testable applications. The primary forms of dependency injection supported by Spring include:
Constructor Injection: This form involves injecting dependencies through the class constructor, ensuring that an object is always created with all its dependencies.
Setter Injection: In this form, Spring uses setter methods to inject the dependencies. This type of injection allows for optional dependencies, and the object can exist without those dependencies being set.
Field Injection: This is done by marking a class field as autowired, allowing Spring to inject the dependency directly into the class field. It's less common than the other two methods and is generally not recommended for mandatory dependencies.
Alongside these, Spring also offers method injection and factory method injection as part of its advanced features. The choice of injection type depends on specific use cases and application requirements.