The @org.springframework.beans.factory.annotation.Autowired(required=true)
annotation is used in Spring Framework to indicate that the dependency injection should be performed for a particular bean and that the dependency is mandatory.
When this annotation is used with the required=true
attribute, it means that the dependency must be resolved and injected at the time of bean creation. If the dependency cannot be satisfied, an exception will be thrown during the application context initialization.
Here’s an example to illustrate the usage of this annotation:
public class MyService {
@Autowired(required = true)
private MyDependency myDependency;
// ... rest of the class
}
In the above example, the MyService
class has a required dependency myDependency
. The @Autowired(required = true)
annotation ensures that the dependency is injected and available for use.
If the dependency myDependency
cannot be resolved (e.g., no bean of type MyDependency
exists or there are multiple beans of type MyDependency
), an exception will be thrown, preventing the application context from being initialized.