<context:property-placeholder location="file:${JBOSS_HOME}/123.properties,classpath:constants.properties" ignore-resource-not-found="true"/>

<bean id="helloWorldBean"
    class="com.javacodegeeks.snippets.enterprise.services.HelloWorld">
    <property name="key1" value="${key1}" />
    <property name="key2" value="${key2}" />
     <property name="key3" value="${key3}" />
</bean>