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Spring MVC -ViewResolvers

Spring MVC - ViewResolvers

In Spring MVC or any web application, for good practice, it’s always recommended to put the entire views or JSP files under -WEB-INF” folder, to protect it from direct access via manual entered URL.

Those views under -WEB-INF” folder are named as internal resource views, as it’s only accessible by the servlet or Spring’s controllers class.

We have many ViewResolver classes in Spring MVC. Below are the some of those

  • InternalResourceViewResolver

  • XmlViewResolver

  • ResourceBundleViewResolver

1.InternalResourceViewResolver

InternalResourceViewResolver is used to resolve -internal resource view” (in simple, it’s final output, jsp or htmp page) based on a predefined URL pattern. In additional, it allows you to add some predefined prefix or suffix to the view name (prefix + view name + suffix), and generate the final view page URL

1.A controller class to return a view, named -WelcomePage-.

public class WelcomeController extends AbstractController{	
	@Override
	protected ModelAndView handleRequestInternal(HttpServletRequest request,
 HttpServletResponse response) throws Exception {
 ModelAndView model = new ModelAndView("WelcomePage"); 
 return model;
	}
}

2.Register InternalResourceViewResolver bean in the Spring’s bean configuration file.

<beans>
<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" />
	<!-- Register the bean -->
	<bean class="controller.WelcomeController" />

	<bean id="viewResolver"
    	      class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
              <property name="prefix">
                  <value>/WEB-INF/pages/</value>
               </property>
              <property name="suffix">
                 <value>.jsp</value>
              </property>
        </bean>
</beans>

Now, Spring will resolve the view’s name -WelcomePage” in the following way:

prefix + view name + suffix = /WEB-INF/pages/WelcomPage.jsp

Similarly, we have XmlViewResolver & ResourceBundleViewResolver, both have their own way of resolving the Views.

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