Spring笔记 - Bean xml装配

命名空间表

aop	Provides elements for declaring aspects and for automatically proxying @AspectJannotated classes as Spring aspects.
beans	The core primitive Spring namespace, enabling declaration of beans and how they should be wired.
context	Comes with elements for configuring the Spring application context, including the abil- ity to autodetect and autowire beans and injection of objects not directly managed by Spring.
jee	Offers integration with Java EE APIs such as JNDI and EJB.
jms	Provides configuration elements for declaring message-driven POJOs.
lang	Enables declaration of beans that are implemented as Groovy, JRuby, or BeanShell scripts.
mvc	Enables Spring MVC capabilities such as annotation-oriented controllers, view control- lers, and interceptors.
oxm	Supports configuration of Spring’s object-to-XML mapping facilities.
tx	Provides for declarative transaction configuration.
util	A miscellaneous selection of utility elements. Includes the ability to declare collec- tions as beans and support for property placeholder elements.

简单Bean配置

基本配置

<bean id="sonnet29" class="ch2_idol.Sonnet29"/>

构造器注入

<bean id="poeticJuggler" class="ch2_idol.PoeticJuggler">
  <constructor-arg value="15"/>
  <constructor-arg ref="sonnet29"/>
 </bean>

静态方法注入

<bean id="stage" class="ch2_idol.Stage" factory-method="getInstance"/>

scoping方式默认是单例singletons.

<bean id="ticket" class="com.springinaction.springidol.Ticket" scope="prototype"/>

singleton	Scopes the bean definition to a single instance per Spring container (default).
prototype	Allows a bean to be instantiated any number of times (once per use).
request	Scopes a bean definition to an HTTP request. Only valid when used with a web-capable Spring context (such as with Spring MVC).
session	Scopes a bean definition to an HTTP session. Only valid when used with a web-capable Spring context (such as with Spring MVC).
global-session	Scopes a bean definition to a global HTTP session. Only valid when used in a portlet context.

初始化bean调用方法，销毁方法

<bean id="auditorium" class="ch2_idol.Auditorium" init-method="turnOnLights" destroy-method="turnOffLights"/>

也可以不配置，但实现InitializingBean ,DisposableBean接口

也可以在头部设置 default-init-method="turnOnLights"  default-destroy-method="turnOffLights"所有bean初始化时调用，除非它有

属性注入

<bean id="instrumentalist" class="ch2_idol.Instrumentalist" >
  <property name="song" value="JingleBells"></property>
  <property name="instrument" ref="saxophone"></property>
 </bean>

内部类

<bean id="kenny"  class="com.springinaction.springidol.Instrumentalist">
    <property name="song"value="JingleBells"/>
    <property name="instrument">
         <bean class="org.springinaction.springidol.Saxophone"/>
    </property>
</bean>

p标记

命名空间xmlns:p="http://www.springframework.org/schema/p

<bean id="kenny" class="com.springinaction.springidol.Instrumentalist"
p:song="JingleBells"
p:instrument-ref="saxophone"/>

集合

<list>	Wiring a list of values, allowing duplicates
<set>	Wiring a set of values, ensuring no duplicates
<map>	Wiring a collection of name-value pairs where name and value can be of any type
<props>	Wiring a collection of name-value pairs where the name and value are both Strings

<bean id="oneManBand1" class="ch2_idol.OneManBand">
  <property name="instruments">
   <list>
    <ref bean="saxophone"/>
    <ref bean="piano"/>
    <ref bean="piano"/>
   </list>
  </property>
 </bean>

<!-- 会去重 -->
 <bean id="oneManBand" class="ch2_idol.OneManBand">
  <property name="instruments">
   <set>
    <ref bean="saxophone"/>
    <ref bean="piano"/>
    <ref bean="piano"/>
   </set>
  </property>
 </bean>

<property name="instruments">
  <map>
   <entry key="GUITAR" value-ref="guitar"/>
   <entry key="CYMBAL" value-ref="cymbal"/>
   <entry key="HARMONICA" value-ref="harmonica"/>
  </map>
 </property>
 
 <property name="instruments">
  <props>
   <prop key="GUITAR">STRUMSTRUMSTRUM</prop>
   <prop key="CYMBAL">CRASHCRASHCRASH</prop>
   <prop key="HARMONICA">HUMHUMHUM</prop>
  </props>
 </property>

空标记

<property name="instruments"><null/></property>