我是Spring MVC的初学者
我尝试在浏览器中显示“hello world”
但我的浏览器显示HTTP 404 -
我的项目结构是:
SpringMVC
-> src
-> main
-> java
-> com
-> mkyong
-> commmon
-> controller
-> webapp
-> WEB-INF
-> pages
我在文件夹 controller 中有HelloWorldController.java:
package com.mkyong.common.controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;
public class HelloWorldController extends AbstractController {
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelAndView model = new ModelAndView("HelloWorldPage");
model.addObject("msg", "hello world");
return model;
}
}
页面中的我有HelloWorldPage.jsp:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<body>
<h1>Spring MVC Hello World Example</h1>
<h2>${msg}</h2>
</body>
</html>
WEB-INF 中的mvc-dispatcher-servlet.xml:
<beans xmlns="http://www.springframework.org/schema/beans"
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-2.5.xsd">
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean name="/welcome.htm"
class="com.mkyong.common.controller.HelloWorldController" />
</beans>
WEB-INF :
中的最终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>
</web-app>
答案 0 :(得分:0)
在mvc-dispatcher-servlet.xml文件中添加以下行
<bean id="handlerMapping" class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
但是我建议使用更新的方法来使用注释来创建MVC应用程序。它更清洁。
请参阅此链接http://static.springsource.org/spring/docs/3.0.x/reference/mvc.html#mvc-ann-controller
答案 1 :(得分:0)
实际上在另一篇文章中,该示例的作者说:“实际上,声明BeanNameUrlHandlerMapping是可选的,默认情况下,如果Spring找不到处理程序映射,DispatcherServlet将自动创建BeanNameUrlHandlerMapping。”
user2319284,我认为您的问题可能是您在web.xml中声明的网址格式是url-pattern&gt; / ,但我认为它必须是 .htm所以当您输入浏览器URL“welcome.htm”模式映射到HelloWorldController类。
尝试使用此web.xml(来自与您的示例相同的站点):
<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>*.htm</url-pattern>
</servlet-mapping>
</web-app>
And use URL http://localhost:8080/SpringMVC/welcome.htm