BeanFactoryAware

 

package com.astute.sparrow.spring.ioc.method_injection;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;

@Component("a")
public class A implements BeanFactoryAware {
	@Autowired
	@Qualifier("b")
	private B b;
	
	private BeanFactory factory;
	
	public void printB() {
		System.out.println(getB());
	}

	public B getB() {
		return (B) factory.getBean("b");
	}

	public void setB(B b) {
		this.b = b;
	}

        //容器在实例化实现了BeanFactoryAware接口的Bean时，会自动将容器本身注入该Bean
	@Override
	public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
		this.factory = beanFactory;
	}

}

package com.astute.sparrow.spring.ioc.method_injection;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component("b")
@Scope("prototype")
public class B {

}

 

<?xml version="1.0" encoding="GBK"?>
<beans xmlns="http://www.springframework.org/schema/beans"
		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
		xmlns:aop="http://www.springframework.org/schema/aop"
		xmlns:tx="http://www.springframework.org/schema/tx"
		xmlns:context="http://www.springframework.org/schema/context"
		xsi:schemaLocation="
			http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
			http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
			http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
			http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

<bean id="a" class="com.astute.sparrow.spring.ioc.method_injection.A">
</bean>
<bean id="b" class="com.astute.sparrow.spring.ioc.method_injection.B" scope="prototype"/>
</beans>

 

package com.astute.sparrow.spring.ioc.method_injection;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;

public class TestBeanFactoryAware {

	public static void main(String[] args) {
		BeanFactory factory = new XmlBeanFactory(new ClassPathResource(
				"com/astute/sparrow/spring/ioc/method_injection/spring-beanfactoryaware.xml"));
		A a = (A) factory.getBean("a");
		a.printB();
		a.printB();
		a.printB();
	}

}