找不到具有自定义注释的Bean

Question

I am trying to find beans with custom annotations after startup of my spring mvc app, but am failing miserably :)

Bean with a custom annotation.

@Animal("Tiger")
public class Tiger implements Cat{

    public boolean evil = true;

    private int teeth;

    public Tiger() {
    }
}

The custom annotation

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE) //can use in class only.
public @interface Animal {
    String value();
}

Then I have a Zoo class that tries to find all beans annotated with @Animal after server startup

    public class Zoo implements ApplicationListener  {

        @Override
        public void onApplicationEvent(ApplicationEvent event) {
            if (event instanceof ContextRefreshedEvent) {
                ApplicationContext appCntxt = ((ContextRefreshedEvent) event).getApplicationContext();

                System.out.println("Say hello to the family!")

                Map<String,Object> beans = appCntxt.getBeansWithAnnotation(Animal.class);

             }

        }
    }

And the Zoo is defined in my application-context.xml

<bean id="Zoo" class="com.app.zoo"/>

The println is being executed but beans.size() is always empty. Ie, no beans can be found.

Any ideas? Don't know if my poor animals are running wild or are simply dead. :)

Answer 1

That's not a Spring bean, it's just a POJO with an annotation. Annotate your annotation with @Component for what I think you are looking for.