Question

So for some reason half our project’s beans are marked with @Component and injected into other objects marked @Component with the @Autowired annotation, while the other half is wired up explicitly with appliciationContext.xml bean declarations and properties with ref beans values.

Question is, in those xml bean declarations, can I inject one of the objects marked @Component? If so, what will its bean reference name be?

For example;

Some classes are annotated like so;

@Component
public class BeanAImpl{ ... }

Then in applicationContext.xml other classes are wired explicitly as they are not annotated;

<bean id="beanB" class="com.myapp.BeanBImpl"></bean>

Can I inject both ‘kinds’ of beans in applicationContext.xml?

<bean id="beanUser" class="com.myapp.BeanUserImpl">
    <property name="beanA">HOW_TO_GET_REF_TO_BEANA?</property>
    <property name="beanB"><ref bean="beanB"/></property>
</bean>

Answer 1

Default name for @Component of type BeanAImpl is beanAImpl, you can use it in XML as you do with manually declared beans (also note that <property> allows shorter syntax):

<property name="beanA" ref = "beanAImpl" />

Alternatively, you can explicitly set a name as @Component("beanA").