Since Spring integration uses standard Listener, it can be configured to support configuration files other than applicationContext.xml.
Adding the following to your web.xml will cause Spring ApplicationContext to be inititalized from all files matching the given pattern:

<!-- Context Configuration locations for Spring XML files -->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/applicationContext-*.xml</param-value>
</context-param>

See

Spring

documentation

for

a

full

description

of

this

parameter.