Sping--Id, Name

bean, id/name 都可以

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

  <bean name="u" class="com.bjsxt.dao.impl.UserDAOImpl">
  </bean>

  <bean id="userService" class="com.bjsxt.service.UserService">
  	<!--
  	<property name="userDAO" ref="u" />
  	 -->
  	 <constructor-arg>
  	 	<ref bean="u"/>
  	 </constructor-arg>
  </bean>

</beans>