Using Apache Camel and Spring, can I build uri using properties?

I have created my own component and I want to do something similar to this:

<camel:camelContext id="camel1">
    <camel:route>
        开发者_开发技巧<camel:from uri="mysch://realthing?network=${network}" id="testEndpoint"/>

I want ${network} to come from a properties file (using Spring properties placeholder):

<context:property-placeholder location="classpath:test.properties"/>

How can I do that?

See this FAQ http://camel.apache.org/how-do-i-use-spring-property-placeholder-with-camel-xml.html