带有参数的Spring FactoryBean方法

Question

我正在通过XML配置和实例工厂方法实例化一些bean:

<bean id="galleryBeanFactory" class="de.tikron.webapp.gallery.bean.XmlGalleryBeanFactory" />

<bean id="pictureBean" factory-bean="galleryBeanFactory" factory-method="createPictureBean" scope="prototype" />

我通过BeanFactory.getBean("bean",arguments ...)实例化我的原型bean编程:

BeanFactory bf = ContextLoader.getCurrentWebApplicationContext();
PictureBean pictureBean = (PictureBean) bf.getBean("pictureBean", picture);

在Spring 3中,我想更改为带注释的基于java的bean配置.这是我的FactoryBean:

@Configuration
public class AnnotatedGalleryBeanFactory implements GalleryBeanFactory

  @Bean
  @Scope(BeanDefinition.SCOPE_PROTOTYPE)
  protected PictureBean createPictureBean(Picture picture) {
    PictureBean bean = new PictureBean();
    bean.setPicture(picture);
    return bean;
  }
}

我的问题:我如何在这里传递参数？上面的代码导致org.springframework.beans.factory.NoSuchBeanDefinitionException:没有为依赖项找到[... model.Picture]类型的限定bean.

Answer 1

用bean定义就好

@Bean
@Scope(BeanDefinition.SCOPE_PROTOTYPE)
protected PictureBean createPictureBean(Picture picture) {
    PictureBean bean = new PictureBean();
    bean.setPicture(picture);
    return bean;
}

bean定义名称是createPictureBean.您可以通过每次调用它BeanFactory#getBean(String, Object...)像这样

ApplicationContext ctx = ...; // instantiate the AnnotationConfigApplicationContext 
Picture picture = ...; // get a Picture instance
PictureBean pictureBean = (PictureBean) ctx.getBean("createPictureBean", picture);

Spring将使用给定的参数(picture在本例中)来调用该@Bean方法.

如果你没有提供参数,Spring会在调用方法时尝试自动装配参数,但会因为Picture上下文中没有bean 而失败.