Spring MVC示例不起作用

时间:2012-08-06 17:55:40

标签: spring spring-mvc

我遇到了麻烦,希望得到你的帮助。我是Spring MVC的初学者(和Spring一样)。我已经关注http://www.mkyong.com/spring3/spring-3-mvc-hello-world-example/,但它没有继续工作。我添加了一个欢迎文件(index.jsp)。当我输入(http:// localhost:8080 / SpringMVC)时。但是当我添加控制器模式(http:// localhost:8080 / SpringMVC / welcome)时,它不起作用(HTTP状态404)。在这里我的配置:

的web.xml

<web-app id="WebApp_ID" 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">
    <display-name>Spring Web MVC Application</display-name>
    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <welcome-file-list>
        <welcome-file>/index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

MVC-调度-servlet.xml中

<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.mkyong.common.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>

我的文件夹结构是:

-> src
   -> main
      -> java
         -> com
            -> mkyong
               -> common
                  -> controller
                     -> HelloController.java
      -> resources
      -> webapp
         -> index.jsp
         -> WEB-INF
            -> mvc-dispatcher-servlet.xml
            -> web.xml
            -> pages
               -> hello.jsp

有人可以帮助我吗?

4 个答案:

答案 0 :(得分:1)

404表示找不到请求的资源。确保您的控制器注释为:

@Controller and @RequestMapping("/welcome") 

从链接:

@Controller
@RequestMapping("/welcome")
public class HelloController {

    @RequestMapping(method = RequestMethod.GET)
    public String printWelcome(ModelMap model) {

        model.addAttribute("message", "Spring 3 MVC Hello World");
        return "hello";

    }

}

答案 1 :(得分:0)

您的servlet映射到'/',您想要命中的控制器接受'/ welcome'的请求

您需要提出的请求应该是( http:// localhost:8080 / welcome )。我不知道他为什么在他的例子中有额外的'SpringMVC'。

此外,将<mvc:annotation-driven/>添加到mvc-dispatcher-servlet.xml以确保它在您的控制器上使用注释。并添加mvc XML命名空间。我的命名空间如下所示:

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:security="http://www.springframework.org/schema/security"
xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.1.xsd
    http://www.springframework.org/schema/security
    http://www.springframework.org/schema/security/spring-security-3.1.xsd">

我建议删除该欢迎文件,直到你的控制器正常工作以保持简单

答案 2 :(得分:0)

您必须将控制器映射到“/".

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

  @RequestMapping(method = RequestMethod.GET)
  public String printWelcome(ModelMap model) {

    model.addAttribute("message", "Spring 3 MVC Hello World");
    return "hello";

  }

}

答案 3 :(得分:0)

在您的视图中添加此库以启用${}

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

这将解决您的问题。