Spring IOC 简单例子

最新推荐文章于 2025-05-30 17:44:42 发布

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本文介绍了一个使用Spring框架的IoC容器管理Bean的具体示例。通过定义接口Animal及其实现类Bird、Cat和Dog，并在Zoo类中注入具体的Animal实例，展示了依赖注入的基本用法。最终通过控制台输出验证了Bean的正确加载。

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结构图

package henu.bean;

public interface Animal {
	
	public void info();
}

package henu.bean;

public class Bird implements Animal{

	@Override
	public void info() {
		// TODO Auto-generated method stub
		System.out.println("this is a pink bird");
	}
	

}

package henu.bean;

public class Cat implements Animal{

	@Override
	public void info() {
		// TODO Auto-generated method stub
		System.out.println("this is a white cat");
	}
	

}

package henu.bean;

public class Dog implements Animal{

	@Override
	public void info() {
		// TODO Auto-generated method stub
		System.out.println("this is a black123 dog");
	}
	

}

package henu.bean;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class IoCTest {
	
	private static BeanFactory beanFactory;
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Zoo zoo = new Zoo();
		beanFactory = new ClassPathXmlApplicationContext("applicationContext.xml");
		
		Animal bird = (Animal)beanFactory.getBean("bird");
		zoo.setAnimal(bird);
		zoo.add();

	}

}

package henu.bean;

public class Zoo {
	private Animal animal;
	public Animal getAnimal(){
		return animal;
	}
	
	
	
	public void setAnimal(Animal animal) {
		this.animal = animal;
	}



	public void add(){
		System.out.println("the animal is in the zoo and");
		animal.info();
	}

}

<?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="bird" class = "henu.bean.Bird"/>
        
       
        
        
</beans>

运行结果：