spring 注入的问题

Question

<property name="auser">
                  <ref bean="user"/>  
              </property>      
               .....              <bean id="user">
                <property name="username">
                  <value>abc</value>
                </property>
              </bean>  

Answer 1

就是想要这种效果：可惜<ref>不能这样用，大家有别的办法么？？？？？？？
            <property name="auser">
                  <ref bean="user"/>  
                      <property name="username">
                         <value>efg</value>
                    </property>
                  </ref>
              </property>      
               .....              <bean id="user">
                <property name="username">
                  <value>abc</value>
                </property>
              </bean>

Answer 2

<property name="auser">
     <ref bean="user2"/> 
</property>      
.....<bean id="user">
      <property name="username">
            <value>abc</value>
      </property>
</bean><bean id="user2">
      <property name="username">
            <value>efg</value>
      </property>
</bean>我想只能用2个Bean 了！！！！