further marshalling work

spring-rest/src/main/java/org/baeldung/config/WebConfig.java

@@ -1,16 +1,44 @@
-package org.baeldung.config;
-
-import org.springframework.context.annotation.ComponentScan;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.web.servlet.config.annotation.EnableWebMvc;
-
-@EnableWebMvc
-@Configuration
-@ComponentScan({ "org.baeldung.web" })
-public class WebConfig {
-
-    public WebConfig() {
-        super();
-    }
-
-}
+package org.baeldung.config;
+
+import java.util.List;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.http.converter.xml.MarshallingHttpMessageConverter;
+import org.springframework.oxm.xstream.XStreamMarshaller;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+
+@Configuration
+@EnableWebMvc
+@ComponentScan({ "org.baeldung.web" })
+public class WebConfig extends WebMvcConfigurerAdapter {
+
+    public WebConfig() {
+        super();
+    }
+
+    // API
+
+    @Override
+    public void configureMessageConverters(final List<HttpMessageConverter<?>> messageConverters) {
+        messageConverters.add(marshallingHttpMessageConverter());
+        messageConverters.add(new MappingJackson2HttpMessageConverter());
+
+        super.configureMessageConverters(messageConverters);
+    }
+
+    // UTIL
+
+    private final MarshallingHttpMessageConverter marshallingHttpMessageConverter() {
+        final MarshallingHttpMessageConverter marshallingHttpMessageConverter = new MarshallingHttpMessageConverter();
+        final XStreamMarshaller xstreamMarshaller = new XStreamMarshaller();
+        marshallingHttpMessageConverter.setMarshaller(xstreamMarshaller);
+        marshallingHttpMessageConverter.setUnmarshaller(xstreamMarshaller);
+
+        return marshallingHttpMessageConverter;
+    }
+
+}