Java Spring Framework Dependency Injection Variants

Variants in Java Spring Framework Dependency Injection:

Constructor dependency Injection: Dependencies are provided through the constructors of the component.

Setter dependency injection: Dependencies are provided through the JavaBeanstyle setter methods of the component and are more popular than Constructor dependency injection.

Constructor Dependency Injection Syntax:

public class ConstructorInjection
{
private Dependency dep;
public ConstructorInjection(Dependency dep)
{
this.dep = dep;
}
}

Setter Dependency Injection Syntax

public class SetterInjection
{
private Dependency dep;
public void setMyDependency(Dependency dep)
{
this.dep = dep;
}
}