Spring MVC - DispatcherServlet by annotations

Question

I got spring MVC application. It runs on Tomcat 7. By now i got this part in my web.xml file:

<servlet> <servlet-name>Spring MVC Dispatcher Servlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/app-config.xml </param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Spring MVC Dispatcher Servlet</servlet-name> <url-pattern>*.htm</url-pattern> </servlet-mapping>

Is there any way to init it by annotations? I got a MainSettings.java class where all my beans are initialyzed by @Bean annotation. So how do i initDispatherServlet there?

Take a look at this - stackoverflow.com/questions/8075790/… — gkamal
– gkamal, Commented May 23, 2013 at 6:49

Japan Trivedi · Accepted Answer · 2013-05-23 09:21:18Z

Here is the example with comments. Hope this helps you.

public class ApplicationInitializer implements WebApplicationInitializer { //Called first when the application starts loading. public void onStartup(ServletContext servletContext) throws ServletException { System.out.println("Inside application initializer..."); //Registering the class that incorporates the annotated DispatcherServlet configuration of spring AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext(); rootContext.register(DispatcherConfig.class); //Adding the listener for the rootContext servletContext.addListener(new ContextLoaderListener(rootContext)); //Registering the dispatcher servlet mappings. ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new DispatcherServlet(rootContext)); dispatcher.setLoadOnStartup(1); dispatcher.addMapping("/"); } }

You don't want to pass your rootContext to the DispatcherServlet. Pass it an empty context that has the rootContext as the parent. Else the context will be initialized twice. I would also suggest extending the AbstractAnnotationConfigDispatcherServletInitializer instead of implementing the WebApplicationInitializer.
I can't find DispatcherConfig.class. Where can I get this from?
@ShervinAsgari Check your Sprint-mvc dependencies. Make sure you have correct version. Above example is based on Spring 3.2
@ShervinAsgari It's user-defined. docs.spring.io/spring/docs/current/javadoc-api/org/…

Community · Accepted Answer · 2017-05-23 12:33:54Z

Writing this because Japs's answer leads to creation of another context, which doesn't see the contents of the security context.

public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer { private static final Log LOGGER = LogFactory.getLog(WebInitializer.class); @Override protected Class<?>[] getRootConfigClasses() { /* this is where you will return you config class * your root config class should @Import other configs * to make them work without needing them to add there */ return new Class[] { ViewConfig.class }; } @Override protected Class<?>[] getServletConfigClasses() { return new Class[0]; } @Override protected String[] getServletMappings() { return new String[] { "/" }; } }

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