Spring 使用ApplicationContextAware （bean中获取在ApplicationContext的引用）

一个bean可以实现BeanFactoryAware接口的方式获得一个他所在BeanFactory的引用。同样，也可以通过实现ApplicationContextAware接口获得他在ApplicationContext的引用。

 public class ContextAwareDemo implements ApplicationContextAware {
     private ApplicationContext ctx;

     public void setApplicationContext(ApplicationContext applicationContext)
             throws BeansException {
         ctx = applicationContext;
     }

     public static void main(String[] args) {
         ApplicationContext ctx = new ClassPathXmlApplicationContext(
                 "/META-INF/spring/acdemo1-context.xml");

         ContextAwareDemo demo = (ContextAwareDemo) ctx.getBean("contextAware");
         demo.displayAppContext();
     }

     public void displayAppContext() {
         System.out.println(ctx);
     }

 }

配置：

 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="
                 http://www.springframework.org/schema/beans
                 http://www.springframework.org/schema/beans/spring-beans.xsd">

     <bean id="contextAware" class="com.apress.prospring2.ch04.context.ContextAwareDemo"/>


 </beans>