Quick Start

context.xml

	<!-- Simple Service -->

	<int:gateway id="gw1" service-interface="foo.TempConverter"
		default-request-channel="simpleExpression" />

	<int:service-activator input-channel="simpleExpression"
		expression="(payload - 32) / 9 * 5"/>

	<!-- Web Service -->

	<int:gateway id="gw2" service-interface="foo.TempConverter"
		default-request-channel="viaWebService" />

	<int:chain input-channel="viaWebService">
		<int:transformer 
		   expression="'&lt;FahrenheitToCelsius xmlns=''http://tempuri.org/''&gt;&lt;Fahrenheit&gt;XXX&lt;/Fahrenheit&gt;&lt;/FahrenheitToCelsius&gt;'.replace('XXX', payload.toString())" />
		<int-ws:header-enricher>
			<int-ws:soap-action value="http://tempuri.org/FahrenheitToCelsius"/>
		</int-ws:header-enricher>
		<int-ws:outbound-gateway uri="http://www.w3schools.com/webservices/tempconvert.asmx"/>
		<int-xml:xpath-transformer  
			xpath-expression="/*[local-name()='FahrenheitToCelsiusResponse']/*[local-name()='FahrenheitToCelsiusResult']"/>
	</int:chain>

Main.java

public class Main {

	public static void main(String... args) throws Exception {
		ApplicationContext ctx = new ClassPathXmlApplicationContext("context.xml");
                // simple service
		TempConverter converter = ctx.getBean("gw1", TempConverter.class);
		System.out.println(converter.fahrenheitToCelcius(68.0f));
                // web service
		converter  = ctx.getBean("gw2", TempConverter.class);
		System.out.println(converter.fahrenheitToCelcius(68.0f));
	}
}

out

20.0
20.0

TempConverter.java

public interface TempConverter {

	float fahrenheitToCelcius(float fahren);

}