Spring-SPEL注入

<bean id="person" class="top.wyyblog.DI7.Person">
		<property name="pname" value="張三"></property>
		<property name="page" value="#{T(java.lang.Math).random() * 50}"></property>
	</bean>
	<bean id="student" class="top.wyyblog.DI7.Student">
		<property name="name" value="#{person.pname}"></property>
		<property name="age" value="#{person.page}"></property>
	</bean>