Question

We can inject a bean in spring as below:

<bean id="injectCollection" class="CollectionInjection">
    <property name="map">
        <map>
            <entry key="someValue">
                <value>Hello World!</value>
            </entry>
            <entry key="someBean">
                <ref local="oracle"/>
            </entry>
        </map>
    </property>
</bean>

How do I inject if my key is a composite key consisting of two strings ?
How will it show in the properties file ?

Answer 1

Not only map, we can inject a list also with multiple strings/classes as key in a bean

<bean id="injectCollection" class="CollectionInjection">
    <property name="fruits">
        <list>
            <ref bean="apple" />
            <ref bean="banana" />  
        </list>
    </property>
</bean>