Spring2.5.6学习笔记-实例化bean的几种方法

1. 用构造器来实例化

<bean id="exampleBean" class="examples.ExampleBean"/>
<bean name="anotherExample" class="examples.ExampleBeanTwo"/>

2. 使用静态工厂方法实例化

注：createInstance必须是一个static方法

<bean id="exampleBean" class="examples.ExampleBean2" factory-method="createInstance"/>

3. 使用实例工厂方法实例化

<!-- the factory bean, which contains a method called createInstance() -->
<bean id="serviceLocator" class="com.foo.DefaultServiceLocator">
<!-- inject any dependencies required by this locator bean -->
</bean>
<!-- the bean to be created via the factory bean 注：class属性必须为空-->
<bean id="exampleBean"
factory-bean="serviceLocator"
factory-method="createInstance"/>