Spring MVC 3.0,404错误，控制器用于服务主页

Question

我想在启动/启动时将我的应用程序（在Apache Tomcat 7.0上运行的Spring）路由到提供主视图的Controller

因此：

1）我在web.xml

中的welcome文件标签中定义了一个index.htm

2）我注释了HomeController @Controller @RequestMapping（“/ index.htm”）

3）我还在xml bean中映射了HomeController

---

我的web.xml：

<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.ContextLoaderListener</listener-class>
    </listener>
    <servlet>
        <servlet-name>yourmarketnet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>yourmarketnet</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>index.htm</welcome-file>
    </welcome-file-list> 
</web-app>

---

我的spring-servlet.xml的片段：

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"     
        p:prefix="/WEB-INF/views/" p:suffix=".jsp" p:viewClass="org.springframework.web.servlet.view.JstlView" />
<!-- Controller beab mappinh -->
   <bean class="com.yourmarketnet.controller.spring.HomeController" 
   name="HomeController"/>

    <bean id="unAuthenticatedUrlMapping"
      class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="/index.htm">HomeController</prop>
            </props>
        </property>
    </bean>

---

来自applicationContext.xml的

片段：

<!-- Activates various annotations to be detected in bean classes --> 
    <context:annotation-config />
    <!-- Scans the classpath for annotated components that will be auto-registered as Spring beans.   For example @Controller and @Service. Make sure to set the correct base-package--> 
    <context:component-scan base-package="com.yourmarketnet.mvc.controller.spring" />    
    <!-- Configures the annotation-driven Spring MVC Controller programming model.  Note that, with Spring 3.0, this tag works in Servlet MVC only!  --> 
    <mvc:annotation-driven />      
    <!-- mapping of static resources-->
    <mvc:resources mapping="/resources/**" location="/resources/" />
    <import resource="hibernate-context.xml" />

---

我的HomeController：

package com.yourmarketnet.controller.spring;

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

       @Controller 
        @RequestMapping(value={"/","/index.htm"})
        //If have also tried RequestMapping("/index.htm") OR //If have also tried RequestMapping("index.htm")
        public class HomeController {

            @RequestMapping(method = RequestMethod.GET)
            public String requestHandler()
            {
                return "Home"; 
            }
        }

这也是我的项目结构：

然而

我在应用程序启动时遇到404错误“请求的资源（）不可用。”

Answer 1

尝试对控制器进行上下文组件扫描。

在..- servlet.xml中添加以下行

<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   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="com.yourmarketnet.controller.spring"/>

Answer 2

项目结构中的index.htm究竟在哪里？

您无法将 index.htm 定义为欢迎文件并将其与控制器一起映射。

你有两个解决方案。

1. 如果您没有使用index.htm，请将其从welcome-file-list中完全删除，然后仅使用＆＃34; /＆＃34; 值映射您的控制器

2. 或者您可以将index.htm仅作为控制器中的映射，而不使用＆＃34; /＆＃34; 映射。并且不要使用任何欢迎文件列表。

希望这会对你有所帮助。

干杯。

Answer 3

这样做

@Controller 
public class HomeController {
            @RequestMapping({"/"})
            public String requestHandler()
            {
                return "Home"; 
            }
        }

你已经全部准备好了。

你不需要

<bean id="unAuthenticatedUrlMapping"
      class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="/index.htm">HomeController</prop>
            </props>
        </property>
    </bean>

如果您正在使用注释。