Spring中三种创建对象的方式

这三种方式分别为：使用静态工厂创建对象，使用实例工厂创建对象，使用无参构造函数创建对象。下面见代码：

package cn.itcast.beans;

public class Bean1 {
	public void add(){
		System.out.println("bean1 ........");
	}
}

package cn.itcast.beans;

public class Bean1_factory {
	public static Bean1 getBean(){
		return new Bean1();
	}
}

package cn.itcast.beans;

public class Bean2 {
	public void add(){
		System.out.println("bean2 ........");
	}
}

package cn.itcast.beans;

public class Bean2_factory {
	public Bean2 getBean(){
		return new Bean2();
	}
}

package cn.itcast.beans;

public class Bean3 {
	public void add(){
		System.out.println("bean3 ........");
	}
}

package cn.itcast.beans;


import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {

	public static void main(String[] args){
		ApplicationContext context = 
				new ClassPathXmlApplicationContext("beans01.xml");
		Bean1 b1 = (Bean1)context.getBean("bean1");
		Bean2 b2 = (Bean2)context.getBean("bean2");
		Bean3 b3 = (Bean3)context.getBean("bean3");
		b1.add();
		b2.add();
		b3.add();
		System.out.println(b1);
		System.out.println(b2);
		System.out.println(b3);
	}
	
	
	
}

<?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"> 
	
	<!-- 使用静态工厂创建对象 -->
	<bean id="bean1" class="cn.itcast.beans.Bean1_factory" 
		factory-method="getBean">
	</bean>
	
	<!-- 使用实例工厂创建对象 -->
	<bean id="bean2_fcty" class="cn.itcast.beans.Bean2_factory">
	
	</bean>
	<bean id="bean2" factory-bean="bean2_fcty" factory-method="getBean">
	
	</bean>
	
	<!-- 使用无参构造函数创建对象 -->
	<bean id="bean3" class="cn.itcast.beans.Bean3">
	</bean>
</beans>   

项目目录截图：