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[Java教程]Spring(3.2.3)


如果 Bean 的属性是个集合,则可以使用 <list/>、<set/>、<map/> 和 <props/> 元素向 List、Set、Map 和 Properties 类型的属性注入值。

 

注入集合值的配置示例:

<bean id="moreComplexObject" class="example.ComplexObject">  <!-- results in a setAdminEmails(java.util.Properties) call -->  <property name="adminEmails">    <props>      <prop key="administrator">administrator@example.org</prop>      <prop key="support">support@example.org</prop>      <prop key="development">development@example.org</prop>    </props>  </property>  <!-- results in a setSomeList(java.util.List) call -->  <property name="someList">    <list>      <value>a list element followed by a reference</value>      <ref bean="myDataSource" />    </list>  </property>  <!-- results in a setSomeMap(java.util.Map) call -->  <property name="someMap">    <map>      <entry key="an entry" value="just some string" />      <entry key="a ref" value-ref="myDataSource" />    </map>  </property>  <!-- results in a setSomeSet(java.util.Set) call -->  <property name="someSet">    <set>      <value>just some string</value>      <ref bean="myDataSource" />    </set>  </property></bean>