spring的配置中有些配置没有id或者name属性，spring是如何注入的？：配置报错 

spring的配置中有些配置没有id或者name属性，spring是如何注入的？ 如下配置：这些配置都只有class属性，没有id属性，不是说DI都是根据id或者name来注入相应的对象的吗？而如下配置完全没有id属性，我想知道spring如何完成注入的？

	<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" p:order="1">
		<property name="interceptors" ref="localeChangeInterceptor" />
	</bean>
	<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" p:order="2">
		<property name="interceptors" ref="localeChangeInterceptor" />
	</bean>
	<!--
		- This bean resolves specific types of exceptions to corresponding logical - view names for error views. The default
		behaviour of DispatcherServlet - is to propagate all exceptions to the servlet container: this will happen - here with
		all other types of exceptions.
	-->
	<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
		<!--property name="defaultErrorView" value="uncaughtExceptionView"/-->
		<property name="exceptionMappings">
			<props>
				<prop key="org.springframework.dao.DataAccessException">dataAccessFailureView</prop>
				<prop key="org.springframework.transaction.TransactionException">dataAccessFailureView</prop>
			</props>
		</property>
	</bean>