Question

I’m new to Spring, been reading a whole lot but I cannot figure out why this doesn’t work. I’ve included the relevant parts below…

web.xml:

<servlet>
    <servlet-name>display</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>display</servlet-name>
    <url-pattern>*.p</url-pattern>
</servlet-mapping>

display-servlet.xml:

<mvc:annotation-driven />
<context:component-scan base-package="com" />   
<bean id="viewResolver"
      class="org.springframework.web.servlet.view.InternalResourceViewResolver"
      p:prefix="/WEB-INF/jsp/"
      p:suffix=".jsp" />

displayController.java:

package com;
@Controller
public class displayController {

    @RequestMapping("/display")
    public ModelAndView displayName() {
        System.out.println("-- in handleRequest");
        ModelAndView mv = new ModelAndView("display");
        user u = new user();
        u.setUsername("bob");   
        mv.addObject("user", u);
        return mv;
    }
}

Now, as far as I know, this is what I think happens, but it isn’t..

1. I go to a url “/user/display.p”
2. Application looks in the web.xml, finds the url pattern “*.p” and notices it should be linked with the servlet display. Then an instance of DispatcherServlet is created and the context in display-servlet.xml is loaded.
3. When display-servlet.xml is loaded, it notices the mvc:annotation-driven and does something (not really sure I understand that one yet, but I think I need it. Then, it notices the component-scan and scans through the “com” package, of which displayController is located.
4. displayController is searched for annotations and it finds it is a controller, and also any url with “/display” in it should automatically trigger the displayName() function.
5. [Somewhere in here things break…]
6. Then, what SHOULD happen (but doesn’t) is the view “display” should be loaded and the “/WEB-INF/jsp/display.jsp” should be loaded. However, no view “display” is found and I receive the error “WARNING: No mapping found for HTTP request with URI [/testing/user/display.p] in DispatcherServlet with name ‘display'”

Can anyone help me on this?

Thanks!

Answer 1

Try this

package com;
@Controller
public class displayController {

@RequestMapping("/user/*)
public ModelAndView displayName() {
    System.out.println("-- in handleRequest");
    ModelAndView mv = new ModelAndView("display");
    user u = new user();
    u.setUsername("bob");   
    mv.addObject("user", u);
    return mv;
}
}

The dispatcher will delegate requests with the pattern *.p to the dispatcherServlet and the dispatcherServlet will delegate the /user/* requests to your method.