Spring入门(02)-注入的三种方法

1.类构造器

    <bean id="personDao" class="com.hx.springdemo01.dao.impl.PersonDaoImpl"/>

2.静态工厂
     <bean id="personDao1" class="com.hx.springdemo01.factory.PersonDaoFactory" factory-method="getInstance"/>

 public static PersonDao getInstance(){
  return new PersonDaoImpl();
 }
     
3.实例化工厂    

 <bean id="personDaoFactory" class="com.hx.springdemo01.factory.PersonDaoFactory"/>
 <bean id="personDao2" factory-bean="personDaoFactory" factory-method="getInstantce"/>
   public PersonDao getInstantce(){
  return new PersonDaoImpl();
 }