Spring MVC example not working - spring

Question

I'm in trouble and would like your help. I'm a beginner in Spring MVC (and Spring at all). I have followed the http://www.mkyong.com/spring3/spring-3-mvc-hello-world-example/ but it isn't working on. I added a welcome file (index.jsp). When i enter (http://localhost:8080/SpringMVC) all right. But when i add the controller pattern (http://localhost:8080/SpringMVC/welcome), it doesn't work (HTTP Status 404). Here my configs:
web.xml
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Spring Web MVC Application</display-name>
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
</welcome-file-list>
</web-app>
mvc-dispatcher-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="com.mkyong.common.controller" />
<bean
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>
and my folder structure is:
-> src
-> main
-> java
-> com
-> mkyong
-> common
-> controller
-> HelloController.java
-> resources
-> webapp
-> index.jsp
-> WEB-INF
-> mvc-dispatcher-servlet.xml
-> web.xml
-> pages
-> hello.jsp
Someone can help me?

Answer 1

404 means that the requested resource cannot be found. Make sure your controller is annotated with:
#Controller and #RequestMapping("/welcome")
From the link:
#Controller
#RequestMapping("/welcome")
public class HelloController {
#RequestMapping(method = RequestMethod.GET)
public String printWelcome(ModelMap model) {
model.addAttribute("message", "Spring 3 MVC Hello World");
return "hello";
}
}

Answer 2

You have your servlet mapped to '/', and the controller you want to hit is accepting requests for '/welcome'
The request you need to make should be (http://localhost:8080/welcome). I don't know why he has that extra 'SpringMVC' in his example.
Also, add <mvc:annotation-driven/> to your mvc-dispatcher-servlet.xml to make sure it's using annotations on your controller(s). And add the mvc XML namespace also. My namespaces look like this:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:security="http://www.springframework.org/schema/security"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security-3.1.xsd">
I would suggest getting rid of that welcome file until you have your controller working correctly to keep things simple

Answer 3

You must have a Controller mapped to "/".
#Controller
#RequestMapping("/")
public class StartController {
#RequestMapping(method = RequestMethod.GET)
public String printWelcome(ModelMap model) {
model.addAttribute("message", "Spring 3 MVC Hello World");
return "hello";
}
}

Answer 4

Include this library on your view to enable ${}
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
This will solve your problem.