What is Dependency Injection in Spring?
Dependency injection is a design pattern that allows dependencies to be created outside of a class and injected into that class. In Spring, this is achieved by using annotations such as @Autowired, @Inject, or by configuring in XML files.
For example:
@Component
public class MyService {
public void serve() {
System.out.println("Service called");
}
}
@Component
public class MyController {
private final MyService myService;
@Autowired
public MyController(MyService myService) {
this.myService = myService;
}
public void doSomething() {
myService.serve();
}
}