code From Spring In Action

1.典型的Spring配置文件

<?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">
</beans>

2.Spring beans 配置

<bean id="user" class="com.zbwang.demo.User"/>

<bean id="user" class="com.zbwang.demo.User">
    <constructor-arg value="10"/>
</bean>

<bean id="user" class="com.zbwang.demo.User">
    <constructor-arg value="10"/>
    <constructor-arg ref="sonnet"/>
</bean>

<bean id="stage" class="com.zbwang.demo.Stage" factory-method="getInstance"/>

<bean id="user" class="com.zbwang.demo.User" scope="prototype"/>

<bean id="user" class="com.zbwang.demo.User" init-method="turnOn" destroy-method="turnOff"/>

InitializingBean声明了afterPropertiesSet方法作为初始化方法，而DisposableBean声明了destroy方法，使用这些接口的缺点是Bean和Spring的API产生了耦合，除非开发一个明显在Spring容器中使用的Bean. 可以为所有bean声明初始化以及销毁方法：

<?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"
    default-init-method="turnOn"
    default-destroy-method="turnOff">
</beans>

set注入

<bean id="user" class="com.zbwang.demo.User">
    <property name="username" value="focusahaha"/>
    <property name="age" value="20"/>　　<property name="neigbor" ref="melon"/></bean>

内部Bean

<bean id="user" class="com.zbwang.demo.User">
    <property name="date">
        <bean class="com.zbwang.demo.Date"/>
    </property>
</bean>

P命名空间

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:p="http://www.springframework.org/schema/p"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

<bean id="user" class="com.zbwang.demo.User"
    p:username = "focusahaha"
    p:age = "20"
　　p:neigbor-ref = "melon"/>

</beans>