通过ApplicationContextAware获取bean

Spring中提供一些Aware相关接口，像是BeanFactoryAware、 ApplicationContextAware、ResourceLoaderAware、ServletContextAware等等，实作这些 Aware接口的Bean在被初始之后，可以取得一些相对应的资源，例如实现BeanFactoryAware的Bean在初始后，Spring容器将会注入BeanFactory的实例，而实现ApplicationContextAware的Bean，在Bean被初始后，将会被注入
ApplicationContext的实例等等

实现了ApplicationContextAware接口，就可以通过ApplicationContext的实例获取到我们想要的bean

public class SpringFactory implements ApplicationContextAware {
	private static ApplicationContext context;
	@SuppressWarnings("static-access")
	public void setApplicationContext(ApplicationContext applicationContext)
			throws BeansException {
		this.context = applicationContext;
	}
	public static Object getObject(String id) {
		Object object = null;
		object = context.getBean(id);
		return object;
	}	
}

<bean id="springfactory" class="com.april.service.impl.SpringFactory"></bean>

例如可以在javaBean中获取

TestDaoImpl testDao = (TestDaoImpl) SpringFactory.getObject("testDao")