Differences between Constructor Injection and Setter Injection

There are many key differences between constructor injection and setter injection.

partial dependency: Setter injection can be used to inject, but the constructor cannot achieve this. Suppose a class has3a property, with3an argument constructor and setter methods. In this case, if you only want to pass information about one property, it can only be passed through the setter method. Override: Setter injection overrides constructor injection. If both constructor and setter injection are used simultaneously, the IOC container will use setter injection. Change: We can easily change the value through setter injection. It does not create a new bean instance like the constructor. Therefore, setter injection is more flexible than constructor injection.