Spring-webmvc 的映射问题 [重复]

Question

在设置 Spring 应用程序（打包为 WAR 并通过 Tomcat 托管）时，当我尝试访问“localhost:8080”时出现 404 和以下错误：

4479 [http-bio-8080-exec-1] WARN  org.springframework.web.servlet.PageNotFound  - No mapping found for HTTP request with URI [/WEB-INF/pages/index.html] in DispatcherServlet with name 'spring'

肯定有一个 /WEB-INF/pages/index.html 文件。

这是我的 web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

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

    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>

</web-app> 

另外，这是我的 spring-servlet.xml 文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans 
    xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    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.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context.xsd">

    <context:component-scan base-package="com.company.app.controller" />

    <mvc:annotation-driven />

    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value= "/WEB-INF/pages/"/>
        <property name="suffix" value=".html"/>
    </bean>

</beans>

还有来自我的控制器的 get 方法：

package com.company.app.controller;

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

@Controller
public class SplashController {

    @RequestMapping(value="/", method=RequestMethod.GET)
    public String index() {
        return "index";
    }

}

那么，我的配置有什么问题？

另外：我想包含 Spring 初始设置的控制台输出，也许它会提供一两个关于缺少什么的线索：

0    [localhost-startStop-1] INFO  org.springframework.web.context.ContextLoader  - Root WebApplicationContext: initialization started
92   [localhost-startStop-1] INFO  org.springframework.web.context.support.XmlWebApplicationContext  - Refreshing Root WebApplicationContext: startup date [Sun Jan 26 16:16:57 EST 2014]; root of context hierarchy
147  [localhost-startStop-1] INFO  org.springframework.beans.factory.xml.XmlBeanDefinitionReader  - Loading XML bean definitions from ServletContext resource [/WEB-INF/spring-servlet.xml]
776  [localhost-startStop-1] INFO  org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping  - Mapped "{[/],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.String com.company.app.controller.SplashController.index()
1547 [localhost-startStop-1] INFO  org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping  - Root mapping to handler 'splashController'
1771 [localhost-startStop-1] INFO  org.springframework.web.context.ContextLoader  - Root WebApplicationContext: initialization completed in 1770 ms
Jan 26, 2014 4:16:59 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'spring'
1809 [localhost-startStop-1] INFO  org.springframework.web.servlet.DispatcherServlet  - FrameworkServlet 'spring': initialization started
1813 [localhost-startStop-1] INFO  org.springframework.web.context.support.XmlWebApplicationContext  - Refreshing WebApplicationContext for namespace 'spring-servlet': startup date [Sun Jan 26 16:16:59 EST 2014]; parent: Root WebApplicationContext
1817 [localhost-startStop-1] INFO  org.springframework.beans.factory.xml.XmlBeanDefinitionReader  - Loading XML bean definitions from ServletContext resource [/WEB-INF/spring-servlet.xml]
1947 [localhost-startStop-1] INFO  org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping  - Mapped "{[/],methods=[GET],params=[],headers=[],consumes=[],produces=[],custom=[]}" onto public java.lang.String com.company.app.controller.SplashController.index()
2164 [localhost-startStop-1] INFO  org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping  - Root mapping to handler 'splashController'
2205 [localhost-startStop-1] INFO  org.springframework.web.servlet.DispatcherServlet  - FrameworkServlet 'spring': initialization completed in 396 ms

Answer 1

无论出于何种原因，将我的 web.xml 的 servlet-mapping 部分更改为此解决了问题：

<servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

Answer 2

我使用 Spring 3.2.3 版本。试试这个配置：

正确的 web.xml：

<servlet-mapping>
<servlet-name>Spring</servlet-name> 
<url-pattern>*.html</url-pattern> 
</servlet-mapping>

正确的 Spring-servlet.xml：

<context:component-scan base-package="your.package.controller"/>
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
<bean id="internalViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"
      p:viewClass="org.springframework.web.servlet.view.JstlView"
      p:prefix="/WEB-INF/jsp/"
      p:suffix=".jsp"/>
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>

正确的映射注释：

@RequestMapping(value="/index", method=RequestMethod.GET)

并创建 index.jsp 文件。

Answer 3

当我的一个朋友建议我检查包装声明时，我也遇到了同样的问题。
在我知道控制器请求映射和 context:component-scan base-package 的定义对于哪个包进行检查后，我发现它不一样，并且在给它正确的包名称后它开始工作。

在你的 Spring 配置文件中检查以下 sn-p

<context:component-scan base-package="your package name" >