Spring学习（一） 三种实例化bean的方式
1.使用类构造器实例化
<bean id="personService" name="code"><bean id="personService2" factory-method="createPersonServiceBean"/>
public static PersonServiceBean createPersonServiceBean(){return new PersonServiceBean();//通过工厂类的静态方法创建PersonServiceBean对象}<bean id="personServiceFactory" factory-bean="personServiceFactory" factory-method="createPersonServiceBean2"/>
public PersonServiceBean createPersonServiceBean2(){return new PersonServiceBean();}