spring实例化bean之简单工厂静态方法实例化

PersonDao

public interface PersonDao {

}
PersonDaoImpl
public class PersonDaoImpl implements PersonDao{

public PersonDaoImpl(){
System.out.println("spring通过构造方法来实例化对象");
}
}
DaoFactory
public class DaoFactory {
//利用工厂类的static方法来创建dao实例
public static PersonDao createPersonDao(){
return new PersonDaoImpl();
}

}
applicationContext.xml
<?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"> <!-- spring调用工厂类的静态方法创建bean -->
<bean id="personDao" class="com.xxc.initBean.two.factory.DaoFactory" factory-method="createPersonDao"></bean>
</beans>

测试类
public class App {
public static void main(String[] args) {
ApplicationContext ac = new ClassPathXmlApplicationContext("com/xxc/initBean/two/applicationContext.xml");
PersonDao personDao = (PersonDao) ac.getBean("personDao");
}
}