@Autowired and PropertyPlaceholder

Question

Is it possible to add a property from PropertyPlaceholder to a bean via @Autowired? I can't inject it in the xml-context-config because the beans are loaded this way:

<context:component-scan base-package="..."/>

Answer 1

In spring 3.0 (I think from Milestone 3) you can use @Value("${foo.bar}") to access properties from PropertyPlaceholder.

Answer 2

A spring 2.5 approach:

@Component
public class Foo {
    @Autowired 
    @Qualifier("myFlag")
    private Boolean flag;
    /* ... */
}

and the context

<context:component-scan base-package="..."/>
<context:property-placeholder location="classpath:app.properties"/>
<!-- the flag bean -->
<bean id="myFlag" class="java.lang.Boolean">
    <constructor-arg value="${foo.bar}"/>
</bean>

Cheers