Spring入门Blog[二、Ioc控制反转集合注入和Scope]

Java代码 

1. Scope：  
2. Singleton：每次拿到的bean都是一个bean  
3. Prototype：每次拿到的都是一个新的对象。在Action层推荐用Prototype  
4. 在xml的bean配置中指定Scope属性即可：如下代码  
5. <bean id="userService" class="com.spring.service.UserServiceImpl" scope="prototype">  
6.         <property name="userDao" ref="userDao"></property>  
7. </bean>  
8.   
9. 集合注入的案例：List、Set和Map  
10.           <property name="someList">  
11.                <list>  
12.                        <value>a list element followed by a reference</value>  
13.                        <ref bean="myDataSource"/>  
14.                </list>  
15.          </property>  
16.          <property name="adminEmails">  
17.                   <props>  
18.                           <prop key="administrator">admin@some.org</prop>  
19.                          <prop key="support">support@some.org</prop>  
20.                   </props>  
21.          </property>  
22.           <property name="someMap">  
23.                      <map>  
24.                              <entry>  
25.                                      <key><value>yup an entry</value></key>  
26.                                              <value>just some string</value>  
27.                                </entry>  
28.                                <entry>  
29.                                        <key><value>yup a ref</value></key>  
30.                                              <ref bean="myDataSource">  
31.                                </entry>  
32.                       </map>  
33.           </property>