2) Enable MTOM on your service - 8.0

If you've used JAX-WS to publish your endpoint you can enable MTOM like so:

import javax.xml.ws.Endpoint;
import javax.xml.ws.soap.SOAPBinding;

Endpoint ep = Endpoint.publish("http://localhost/myService", 
   new MyService());
SOAPBinding binding = (SOAPBinding) ep.getBinding();
binding.setMTOMEnabled(true);

Or, if you used XML to publish your endpoint:

<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:jaxws="http://cxf.apache.org/jaxws"
   xsi:schemaLocation="
      http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
      http://cxf.apache.org/jaxws
      http://cxf.apache.org/schema/jaxws.xsd">

   <jaxws:endpoint 
      id="helloWorld" 
      implementor="demo.spring.HelloWorldImpl" 
      address="http://localhost/HelloWorld">
      <jaxws:properties>
         <entry key="mtom-enabled" value="true"/>
      </jaxws:properties>
   </jaxws:endpoint>

</beans>

If you're using the simple frontend you can set the mtom-enabled property on your ServerFactoryBean or ClientProxyFactoryBean:

Map<String,Object> props = new HashMap<String, Object>();
// Boolean.TRUE or "true" will work as the property value here
props.put("mtom-enabled", Boolean.TRUE); 

ClientProxyFactoryBean pf = new ClientProxyFactoryBean();
pf.setPropertyies(props);
...
YourClient client = (YourClient) pf.create();

ServerFactoryBean sf = new ServerFactoryBean();
sf.setPropertyies(props);
...
sf.create();

Similarly, you can use the XML configuration:

<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:simple="http://cxf.apache.org/simple"
   xsi:schemaLocation="
      http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
      http://cxf.apache.org/simple 
      http://cxf.apache.org/schema/simple.xsd">

   <simple:server
      id="helloWorld" 
      serviceClass="demo.spring.HelloWorldImpl" 
      address="http://localhost/HelloWorld">
      <simple:properties>
         <entry key="mtom-enabled" value="true"/>
      </simple:properties>
   </simple:server>

   <simple:client
      id="helloWorldClient" 
      serviceClass="demo.spring.HelloWorldImpl" 
      address="http://localhost/HelloWorld">
      <simple:properties>
         <entry key="mtom-enabled" value="true"/>
      </simple:properties>
   </simple:client>

</beans>