Spring配置文件解析--集合注入方法

<bean id="moreComplexObject" class="example.ComplexObject">
  <property name="adminEmails">
    <props>
        <prop key="administrator">administrator@example.org</prop>
    </props>
  </property>
 
  <property name="someList">
    <list>
        <value>a list</value>
        <ref bean="myDataSource" />
    </list>
  </property>
  
  <property name="someMap">
    <map>
        <entry key="1" value="INDIA"/>
         <ref bean="myDataSource" />
    </map>
  </property>
  
  <property name="someSet">
    <set>
        <value>just some string</value>
        <ref bean="myDataSource" />
    </set>
  </property>
</bean>