Update default view resolver in MVC Java config

When not ViewResolver's have been registered, detect if the context
contains any other ViewResolver beans. If not, add InternalResourceVR
to match default DispatcherServlet behavior.

Issue: SPR-12267

spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupport.java

@@ -26,6 +26,7 @@ import javax.servlet.http.HttpServletRequest;
 import javax.xml.transform.Source;
 
 import org.springframework.beans.BeanUtils;
+import org.springframework.beans.factory.BeanFactoryUtils;
 import org.springframework.beans.factory.BeanInitializationException;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
@@ -85,6 +86,7 @@ import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;
 import org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver;
 import org.springframework.web.servlet.resource.ResourceUrlProvider;
 import org.springframework.web.servlet.resource.ResourceUrlProviderExposingInterceptor;
+import org.springframework.web.servlet.view.InternalResourceViewResolver;
 import org.springframework.web.servlet.view.ViewResolverComposite;
 import org.springframework.web.util.UrlPathHelper;
 
@@ -798,6 +800,14 @@ public class WebMvcConfigurationSupport implements ApplicationContextAware, Serv
 		registry.setApplicationContext(this.applicationContext);
 		configureViewResolvers(registry);
 
+		if (registry.getViewResolvers().isEmpty()) {
+			Map<String, ViewResolver> map = BeanFactoryUtils.beansOfTypeIncludingAncestors(
+					this.applicationContext, ViewResolver.class, true, false);
+			if (map.isEmpty()) {
+				registry.getViewResolvers().add(new InternalResourceViewResolver());
+			}
+		}
+
 		ViewResolverComposite composite = new ViewResolverComposite();
 		composite.setOrder(registry.getOrder());
 		composite.setViewResolvers(registry.getViewResolvers());