No mapping found error using Spring MVC

All:

I hope that you can help me. I am pretty good when it comes to working in an application that has already been configured and setup, but the flip side is that I am apparently not very good in setting up a new application - especially when it comes to Spring MVC. I am trying to set up a very simple application so that I can build upon it later. I get a 404 error though when I run it. Everything deploys OK and compiles OK but the log shows an error of: WARNING: No mapping found for HTTP request with URI [/SpringTemplate/hello.htm] in DispatcherServlet with name 'dispatcher'. Can someone please explain to me what I have done wrong? I have inserted the files web.xml, dispatcher-servlet.xml, some logged entries, and my HelloController.java class.

web.xml

<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" 
                           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderList开发者_高级运维ener</listener-class>
</listener>
<servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>*.htm</url-pattern>
</servlet-mapping>
<session-config>
    <session-timeout>
        30
    </session-timeout>
</session-config>
<welcome-file-list>
    <welcome-file>redirect.jsp</welcome-file>
</welcome-file-list>
</web-app>

dispatcher-servlet.xml

<?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:aop="http://www.springframework.org/schema/aop"
   xmlns:tx="http://www.springframework.org/schema/tx"
   xmlns:ctx="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/aop
                       http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
                       http://www.springframework.org/schema/tx
                       http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
                       http://www.springframework.org/schema/context
                       http://www.springframework.org/schema/context/spring-context-3.0.xsd">

<ctx:annotation-config />
<ctx:component-scan base-package="greenthorn.com" />

<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
    <property name="mappings">
        <props>
            <prop key="index.htm">indexController</prop>
        </props>
    </property>
</bean>

<bean id="viewResolver"
      class="org.springframework.web.servlet.view.InternalResourceViewResolver"
      p:prefix="/WEB-INF/jsp/"
      p:suffix=".jsp" />

<!--
The index controller.
-->
<bean name="indexController"
      class="org.springframework.web.servlet.mvc.ParameterizableViewController"
      p:viewName="index" />

</beans>

Logging entries upon successful deployment

INFO: FrameworkServlet 'dispatcher': initialization started
INFO: Refreshing WebApplicationContext for namespace 'dispatcher-servlet': startup date [Wed Nov 10 20:51:43 EST 2010]; parent: Root WebApplicationContext
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/dispatcher-servlet.xml]
INFO: JSR-250 'javax.annotation.ManagedBean' found and supported for component scanning
INFO: JSR-330 'javax.inject.Named' annotation found and supported for component scanning
INFO: JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@17dca7b8: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,helloController,org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping#0,urlMapping,viewResolver,indexController]; parent: org.springframework.beans.factory.support.DefaultListableBeanFactory@2674b0ba
INFO: Mapped URL path [/hello] onto handler [greenthorn.com.controller.HelloController@3bbd0836]
INFO: Mapped URL path [/hello/*] onto handler [greenthorn.com.controller.HelloController@3bbd0836]
INFO: Mapped URL path [/index.htm] onto handler [org.springframework.web.servlet.mvc.ParameterizableViewController@64cbad03]
INFO: FrameworkServlet 'dispatcher': initialization completed in 454 ms
INFO: Loading application SpringTemplate at /SpringTemplate
INFO: SpringTemplate was successfully deployed in 4,749 milliseconds.

HelloController.java

package greenthorn.com.controller;

import login.Passwordproperties;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import greenthorn.com.service.HelloService;
import greenthorn.com.service.PasswordService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class HelloController {
    private HelloService helloService;

    public HelloController() {}

    /**
     * @param helloService the helloService to set
     */
    @Autowired
    public void setHelloService(HelloService helloService) {
        this.helloService = helloService;
    }

    @RequestMapping("/hello.htm")
    public ModelAndView onSubmit(@ModelAttribute("command") Name command) throws Exception {
        ModelAndView mv = new ModelAndView("helloView");
        mv.addObject("helloMessage", helloService.sayHello(command.getValue()));
        mv.addObject("greeting", "Thanks for dropping by...");
        return mv;
    }
}

In your current configuration HelloController.onSubmit() is mapped to /hello/hello.htm due to ControllerClassNameHandlerMapping.

If you want to map it to /hello.htm, you need to replace ControllerClassNameHandlerMapping with DefaultAnnotationHandlerMapping (usually this mapping is used by default, but in your case defaults are not applied because you declare handler mappings manually).

The cause of the failure may be the parameter, "@ModelAttribute("command") Name command". this type of parameter is usually used for post method.