Spring2.5学习1.3_三种实例化bean的方式

1.使用类构造器

2.使用静态工厂

3.使用实例工厂

没有做改动的文件省略。。。可以参考前两篇文章中贴出的代码

配置文件beans.xml文件

<?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-2.5.xsd">
		<!-- 构造方法 -->
        <bean id="personService" class="xjj.service.impl.PersonServiceBean"></bean>
		<!-- 静态工厂 -->
        <bean id="personService2" class="xjj.service.impl.PersonServiceBeanFactory" 
          factory-method="createPersonServiceBean"/>
		<!-- 实例工厂 --> 
		<!-- 先对工厂类进行实例化，然后使用工厂实例里的工厂方法 -->
	<bean id="personServiceFactory" class="xjj.service.impl.PersonServiceBeanFactory"/> 
	<bean id="personService3" factory-bean="personServiceFactory" factory-method="createPersonServiceBean2"/>
</beans>

工厂类：PersonServiceBeanFactory.java

package xjj.service.impl;
public class PersonServiceBeanFactory {
	/**   
	* 方法描述：静态工厂方法
	* @return  
	*/
	public static PersonServiceBean createPersonServiceBean(){
		return new PersonServiceBean();
	}
	
	/**   
	* 方法描述：实例工厂方法
	* @return  
	*/
	public PersonServiceBean createPersonServiceBean2(){
		return new PersonServiceBean();
	}
}

SpringTest.java

package junit.test;

import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import xjj.service.PersonService;

public class SpringTest {

	@BeforeClass
	public static void setUpBeforeClass() throws Exception {
	}

	@Test 
	public void instanceSpring(){
//		XjjClassPathXMLApplicationContext ctx = new XjjClassPathXMLApplicationContext("beans.xml");
//		PersonService personService = (PersonService)ctx.getBean("personService");
//		personService.save();
		
		ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");
		// 构造方法
		PersonService personService = (PersonService)ctx.getBean("personService");
		personService.save();
		// 静态工厂
		PersonService personService2 = (PersonService)ctx.getBean("personService2");
		personService2.save();
		// 实例工厂
		PersonService personService3 = (PersonService)ctx.getBean("personService3");
		personService3.save();
	}
}

结果：