java - Spring and Abstract class - injecting properties in abstract classes

Question

I have an abstract base class with a property called "mailserver" which I wish to inject from the spring ioc container. However when I run the concreted implementations of the abstract class I get a null for the mailserver property.

What is the correct way of doing this? Have you tried doing someting like this and been successful? Please share.

Answer 1

Mark the abstract base class definition as abstract by using the abstract attribute , and in the concrete class definition , make the parent attribute be the name of the abstract class 's bean name

Something like this:

<bean id="abstractBaseClass" abstract="true" class="pacakge1.AbstractBaseClass">
  <property name="mailserver" value="DefaultMailServer"/>
</bean>

<bean id="concreteClass1" class="pacakge1.ConcreteClass1" parent="abstractBaseClass">     
  <!--Override the value of the abstract based class if necessary-->
  <property name="mailserver" value="AnotherMailServer"/>
</bean>