java - servlet 类对 "org.springframework.web.servlet.DispatcherServlet"的引用未实现接口(interface) javax.servlet.Servlet

Question

我是 Spring 新手，正在尝试使用 Maven 部署和运行我的第一个 Spring Web 应用程序。有关更多详细信息，请参阅 here (我昨天发布的一个问题):

现在，我遇到的问题是:当我尝试以下 2 个 URL 时，我收到一个HTTP 状态 404 - 资源不可用。

http://localhost:8080/CounterWebApp/welcome
http://localhost:8080/CounterWebApp/welcome/sandeep

Tomcat 服务器控制台警告消息:

No mapping found for HTTP request URI [/CounterWebApp/welcome]
No mapping found for HTTP request URI [/CounterWebApp/welcome/sandeep]

这是我的 web.xml 的相关部分:

<servlet>
    <servlet-name>mvc-dispatcher</servlet-name>
    <servlet-class>
        org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

这里我有一个警告:

servlet-class references to "org.springframework.web.servlet.DispatcherServlet" that does not implement interface javax.servlet.Servlet

Controller 类:

package com.sandeep.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/")
public class BaseController {

    @RequestMapping(value="/welcome", method = RequestMethod.GET)
    public String welcome(ModelMap model) {

        model.addAttribute("message", "Maven Web Project + Spring 3 MVC - welcome()");

        //Spring uses InternalResourceViewResolver and return back index.jsp
        return "index";

    }

    @RequestMapping(value="/welcome/{name}", method = RequestMethod.GET)
    public String welcomeName(@PathVariable String name, ModelMap model) {

        model.addAttribute("message", "Maven Web Project + Spring 3 MVC - " + name);
        return "index";

    }

}

我错过了什么？请帮忙。

编辑:

web.xml:

<servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

mvc-dispatcher-servlet.xml:

<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> 

我在/WEB-INF/pages/中有这个index.jsp。

pom.xml(servlet api 依赖项)

<!--Servlet API Dependency-->
                <dependency>
                        <groupId>javax.servlet</groupId>
                        <artifactId>servlet-api</artifactId>
                        <version>2.5</version>
                        <scope>provided</scope>
                </dependency>

Answer 1

解决方案:

mvc-dispatcher-servlet.xml 中的base-package 值不正确。

我必须纠正它，然后构建、部署并运行。 :)

mvc-dispatcher-servlet.xml(最终)

<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.sandeep.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>

这是完整的documentation :)