Adds example how to use the handler

apps/rest-showcase/pom.xml

@@ -47,6 +47,11 @@
             <artifactId>struts2-config-browser-plugin</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-xml</artifactId>
+        </dependency>
+
         <!-- Logging -->
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>

apps/rest-showcase/src/main/resources/struts.xml

@@ -32,6 +32,11 @@
 
     <constant name="struts.convention.package.locators" value="example"/>
 
+<!--
+    <bean name="jacksonXml" type="org.apache.struts2.rest.handler.ContentTypeHandler" class="org.apache.struts2.rest.handler.JacksonXmlHandler" />
+    <constant name="struts.rest.handlerOverride.xml" value="jacksonXml"/>
+-->
+
     <package name="rest-showcase" extends="rest-default">
         <global-allowed-methods>index,show,create,update,destroy,deleteConfirm,edit,editNew</global-allowed-methods>
     </package>