Spring框架通过工厂创建Bean的三种方式实现

public class AirPlane {
	private String DriverName;// 机长姓名
	private String AirPlaneName;// 飞机名字
	private String longth;// 飞机长度
	private Integer num;// 载客量
	//省略getter与setter方法
}

package com.gql.factory;
import com.gql.bean.AirPlane;
/**
 * 静态工厂
 * 
 * @author guoqianliang
 */
public class AirPlaneStaticFactory {
	public static AirPlane getAirPlane(String drivername) {
		System.out.println("静态工厂造飞机...");
		AirPlane airplan = new AirPlane();
		airplan.setDriverName(drivername);
		airplan.setAirPlaneName("歼20");
		airplan.setLongth(20);
		airplan.setNum(1);
		return airplan;
	}
}

<!-- 静态工厂: factory-method="getAirPlane"指定哪个方法是工厂方法-->
	<bean id="airPlan1" class="com.gql.factory.AirPlaneStaticFactory" factory-method="getAirPlane">
		<constructor-arg value="舒克"></constructor-arg>
	</bean>

@Test
	public void test07() {
		System.out.println("容器启动完成");
		AirPlane bean = (AirPlane) ioc.getBean("airPlan1");
		System.out.println("打印飞机属性:" + bean);
	}

package com.gql.factory;
import com.gql.bean.AirPlane;
/**
 * 实例工厂
 * @author guoqianliang
 */
public class AirPlaneInstanceFactory {
	public AirPlane getAirPlane(String drivername) {
		System.out.println("实例工厂造飞机...");
		AirPlane airplan = new AirPlane();
		airplan.setDriverName(drivername);
		airplan.setAirPlaneName("歼20");
		airplan.setLongth(20);
		airplan.setNum(1);
		return airplan;
	}
}

<bean id="InstanceFactory"
		class="com.gql.factory.AirPlaneInstanceFactory"></bean>
	<bean id="airPlan2" class="com.gql.bean.AirPlane"
		factory-bean="InstanceFactory" factory-method="getAirPlane">
		<constructor-arg value="舒克二号"></constructor-arg>
	</bean>

	@Test
	public void test08() {
		System.out.println("容器启动完成");
		AirPlane bean = (AirPlane) ioc.getBean("airPlan2");
		System.out.println("打印飞机属性:" + bean);
	}

package com.gql.factory;
import org.springframework.beans.factory.FactoryBean;
import com.gql.bean.Book;
public class MyFactoryBean implements FactoryBean<Book> {
	/**
	 * 返回创建的对象
	 */
	@Override
	public Book getObject() throws Exception {
		System.out.println("MyFactoryBean创建对象...");
		Book book = new Book();
		book.setBookName("红楼梦");
		book.setAuthor("曹雪芹");
		return book;
	}

	/**
	 * 返回创建的对象的类型
	 */
	@Override
	public Class<?> getObjectType() {
		// TODO Auto-generated method stub
		return Book.class;
	}

	/**
	 * 是单例? true:是 false:不是
	 */
	@Override
	public boolean isSingleton() {
		// TODO Auto-generated method stub
		return true;
	}
}

<!-- 使用FactoryBean -->
<bean id="myFactoryBean" class="com.gql.factory.MyFactoryBean"></bean>

@Test
	public void test09() {
		System.out.println("容器启动完成");
		Object bean = ioc.getBean("myFactoryBean");
		System.out.println("打印属性:" + bean);
	}