Spring MVC: RequestMapping not working, no URL paths identified

Can you try with /app/* as the servlet mapping url and /home as the RequestMapping. Then try accessing it with /app/home. There are certain issues with mapping /* - once you get the rest of the mapping working with /app - we can look at removing the /app

I once wanted to complete a spring MVC project with rest URLs and I too could not find any really useful resources. I did post an article on my blog, but have since removed the blog. Here is an extract from the post:

I am using:

• NetBeans 6.9.1
• Spring Framework 3.0.2 RELEASE (including JSTL)
• JAVA JDK 6
• GlassFish Server 3

1. • Start new NetBeans project
   • choose Java Web – Web Application
   • Click Next >
   • Enter Project Name "restMVC" and choose the project location
   • Click Next >
   • Choose GlassFish Server 3 – select Java EE 6 Web
   • Click Next >
   • Check Spring Web MVC – click Configuration tab and change Dispatcher Name to "restMVC" and Dispatcher Mapping to "/"
   • Click Finish

2. Open restMVC-servlet.xml – we want to have the servlet search for the @Controller annotation within classes within a specific package, to do that we need to insert a context:component-scan into the file which means we also need to add the schemeLocation as follows:

   <?xml version="1.0" encoding="UTF-8"?>
   <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:p="http://www.springframework.org/schema/p"
     xmlns:context="http://www.springframework.org/schema/context"
     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="restMVC.web"/>
   ...
   

   Of course, we haven’t created the package yet, so let’s do that.

3. • Right click on "Source Packages"
   • Go to New
   • Click Java Package
   • Enter the Package Name restMVC.web

4. Now we can create our first controller –

   • Right click on the new restMVC.web package
   • Go to New
   • Click Java class
   • Enter the Class Name myController

5. Next add the @Controller annotation, then right click – fix imports:

   package restMVC.web;
   import org.springframework.stereotype.Controller;
   
   @Controller
   public class myController {
   }
   

6. Now we can add some request mapping URIs, remember we now have many different options for mapping using the @RequestMapping annotation, so be sure to review the Spring Docs.

   package restMVC.web;
   
   import java.util.ArrayList;
   import java.util.List;
   import org.springframework.stereotype.Controller;
   import org.springframework.ui.Model;
   import org.springframework.web.bind.annotation.PathVariable;
   import org.springframework.web.bind.annotation.RequestMapping;
   
   @Controller
   public class myController {
       @RequestMapping("/test")
       public String getTests(Model model) {
           List tests = new ArrayList();
           tests.add("<a href=\"test/1\">test 1</a>");
           tests.add("<a href=\"test/2\">test 2</a>");
           model.addAttribute("tests", tests);
           return "tests";
       }
       @RequestMapping("/test/{testId}")
       public String getTest(@PathVariable String testId, Model model) {
           List tests = new ArrayList();
           tests.add("test " + testId);
           model.addAttribute("tests", tests);
           return "tests";
       }
   }
   

7. We need to create a view for tests.jsp. This is created by taking the String that is returned from the getTests and getTest methods ("tests") and using the viewResolver in the restMVC-servlet.xml appending .jsp – more on that to come.

   • Right click on (projects view) restMVC -> Web Pages -> WEB-INF -> jsp folder
   • Click New
   • Click JSP..
   • Enter File Name "tests"

8. Edit tests.jsp. Enter the following at the top of the page:

   <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
   

   And then this within the body element:

   <table>
     <c:forEach var="test" items="${tests}">
       <tr>
         <td>${test}</td>
       </tr>
     </c:forEach>
   </table>
   

9. Finally we need to make sure the viewResolver is in restMVC-servlet.xml. The complete file should look like:

   <?xml version="1.0" encoding="UTF-8"?>
   <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:p="http://www.springframework.org/schema/p"
     xmlns:context="http://www.springframework.org/schema/context"
     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="restMVC.web"/>
     <bean id="viewResolver"
       class="org.springframework.web.servlet.view.InternalResourceViewResolver"
       p:prefix="/WEB-INF/jsp/"
       p:suffix=".jsp" />
   </beans>
   

10. You might want to edit redirect.jsp so it redirects to /test.

11. Now click "Run Main Project"