deployment descriptor in java

spring-mvc-java/pom.xml

@@ -120,7 +120,7 @@
 
 	<properties>
 		<!-- Spring -->
-		<org.springframework.version>3.2.2.RELEASE</org.springframework.version>
+		<org.springframework.version>3.2.3.RELEASE</org.springframework.version>
 
 		<!-- logging -->
 		<org.slf4j.version>1.7.5</org.slf4j.version>
@@ -132,7 +132,7 @@
 		<mockito.version>1.9.5</mockito.version>
 
 		<httpcore.version>4.2.4</httpcore.version>
-		<httpclient.version>4.2.4</httpclient.version>
+		<httpclient.version>4.2.5</httpclient.version>
 
 		<rest-assured.version>1.8.0</rest-assured.version>
 		<groovy.version>1.8.9</groovy.version>

spring-mvc-java/src/main/java/org/baeldung/spring/web/config/MainWebAppInitializer.java

@@ -0,0 +1,41 @@
+package org.baeldung.spring.web.config;
+
+import java.util.Set;
+
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRegistration;
+
+import org.springframework.web.WebApplicationInitializer;
+import org.springframework.web.context.ContextLoaderListener;
+import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
+import org.springframework.web.context.support.GenericWebApplicationContext;
+import org.springframework.web.servlet.DispatcherServlet;
+
+public class MainWebAppInitializer implements WebApplicationInitializer {
+
+    /**
+     * Register and configure all Servlet container components necessary to power the web application.
+     */
+    @Override
+    public void onStartup(final ServletContext sc) throws ServletException {
+        System.out.println("GreenhouseWebAppInitializer.onStartup()");
+
+        // Create the 'root' Spring application context
+        final AnnotationConfigWebApplicationContext root = new AnnotationConfigWebApplicationContext();
+        root.scan("org.baeldung.spring.web.config");
+        // root.getEnvironment().setDefaultProfiles("embedded");
+
+        // Manages the lifecycle of the root application context
+        sc.addListener(new ContextLoaderListener(root));
+
+        // Handles requests into the application
+        final ServletRegistration.Dynamic appServlet = sc.addServlet("mvc", new DispatcherServlet(new GenericWebApplicationContext()));
+        appServlet.setLoadOnStartup(1);
+        final Set<String> mappingConflicts = appServlet.addMapping("/");
+        if (!mappingConflicts.isEmpty()) {
+            throw new IllegalStateException("'appServlet' could not be mapped to '/' due " + "to an existing mapping. This is a known issue under Tomcat versions " + "<= 7.0.14; see https://issues.apache.org/bugzilla/show_bug.cgi?id=51278");
+        }
+    }
+
+}