spring--ioc----2013-07-31

 1、注入方式

      构造方法  

 

<beans>
<bean id="foo" class="x.y.Foo">
<constructor-arg ref="bar"/>
<constructor-arg ref="baz"/>
</bean>
<bean id="bar" class="x.y.Bar"/>
<bean id="baz" class="x.y.Baz"/>
</beans>

 

<bean id="exampleBean" class="examples.ExampleBean">
<constructor-arg type="int" value="7500000"/>
<constructor-arg type="java.lang.String" value="42"/>
</bean>

   

<bean id="exampleBean" class="examples.ExampleBean">
<constructor-arg index="0" value="7500000"/>
<constructor-arg index="1" value="42"/>
</bean>

 

   setter方法

        

<bean id="exampleBean" class="examples.ExampleBean">
<!-- setter injection using the nested <ref/> element -->
<property name="beanOne"><ref bean="anotherExampleBean"/></property>
<!-- setter injection using the neater 'ref' attribute -->
<property name="beanTwo" ref="yetAnotherBean"/>
<property name="integerProperty" value="1"/>
</bean>
<bean id="anotherExampleBean" class="examples.AnotherBean"/>
<bean id="yetAnotherBean" class="examples.YetAnotherBean"/>   

    接口注入

 

    集合注入

<bean id="u" class="com.dao.impl.UserDaoImpl">
	<property name="lists" >
		<list>
			<value>1</value>
			<ref bean="user"/>
		</list>
	</property>
       <property name="maps" >
		<map>
			<entity> <key>1</key> 
				  <ref bean="user"/>

			</entity>
			<entity key="1" value="1"></entity>
		</map>
	</property>

</bean>
<!--StartFragment -->

 bean的scope

 

<!--单例-->
<bean id="accountService" class="com.foo.DefaultAccountService" scope="singleton"/>
<!--每次创建新的对象-->
<bean id="accountService" class="com.foo.DefaultAccountService" scope="proptotype"/>

 

Spring容器自动装配

<bean id="u1" class="com.dao.impl.UserDaoImpl1"></bean>
	<bean id="u2" class="com.dao.impl.UserDaoImpl2"></bean>
	<bean id="userService" class="com.bjsxt.service.UserService" aotuwire="byName"></bean>

 

<bean id="u1" class="com.dao.impl.UserDaoImpl1"></bean>
	<bean id="u2" class="com.dao.impl.UserDaoImpl2"></bean>
	<bean id="userService" class="com.bjsxt.service.UserService" aotuwire="byType"></bean>