Spring MVC入门实例

1.web.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns="http://java.sun.com/xml/ns/javaee"
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
 id="WebApp_ID" version="3.0">
 <display-name>myweb</display-name>
 <welcome-file-list>
 <welcome-file>index.html</welcome-file>
 </welcome-file-list>
 <!-- 加载所有的配置文件 -->
 <context-param>
 <param-name>contextConfigLocation</param-name>
 <param-value>classpath*:config/spring-*.xml</param-value>
 </context-param>
 <!-- 配置Spring监听 -->
 <listener>
 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>
 <!-- 配置字符集 -->
 <filter>
 <filter-name>encodingFilter</filter-name>
 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
 <init-param>
 <param-name>encoding</param-name>
 <param-value>UTF-8</param-value>
 </init-param>
 <init-param>
 <param-name>forceEncoding</param-name>
 <param-value>true</param-value>
 </init-param>
 </filter>
 <filter-mapping>
 <filter-name>encodingFilter</filter-name>
 <url-pattern>/</url-pattern>
 </filter-mapping>
 <!-- 配置SpringMVC -->
 <servlet>
 <description>myweb</description>
 <display-name>myweb</display-name>
 <servlet-name>springMVC</servlet-name>
 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 <init-param>
 <param-name>contextConfigLocation</param-name>
 <param-value>classpath*:config/spring-mvc.xml</param-value>
 </init-param>
 <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
 <servlet-name>springMVC</servlet-name>
 <url-pattern>/</url-pattern>
 </servlet-mapping>
</web-app>

2.spring-mvc配置

<?xml version="1.0" encoding="UTF-8"?>
<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"
 xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
 xmlns:tx="http://www.springframework.org/schema/tx"
 xsi:schemaLocation="http://www.springframework.org/schema/beans 
 http://www.springframework.org/schema/beans/spring-beans.xsd
 http://www.springframework.org/schema/context 
 http://www.springframework.org/schema/context/spring-context-3.0.xsd
 http://www.springframework.org/schema/aop
 http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
 http://www.springframework.org/schema/tx 
 http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
 <!-- 开启Spring MVC注解 -->
 <mvc:annotation-driven />
 <!-- 处理静态资源 -->
 <mvc:resources location="/resources" mapping="/resources/**" />
 <!-- 打开Spring的Annotation支持 -->
 <context:annotation-config />
 <!-- 注解扫描包 -->
 <context:component-scan base-package="com.myweb.controller" />
 <!-- ViewResolver -->
 <!-- 默认的视图解析器 在上边的解析错误时使用 (默认使用html)- -->
 <bean id="defaultViewResolver"
 class="org.springframework.web.servlet.view.InternalResourceViewResolver">
 <property name="prefix" value="/WEB-INF/jsp/" />
 <property name="suffix" value=".jsp" />
 </bean>
</beans>

3.HelloController类

package com.myweb.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class HelloController {
 @RequestMapping(value = "/hello", method = RequestMethod.GET)
 public ModelAndView printWelcome() {
 ModelAndView mv = new ModelAndView();
 mv.setViewName("welcome");
 mv.addObject("message", "you are welcome");
 return mv;
 }
}

4.welcome.jsp

<%@ page language="java" contentType="text/html; UTF-8"
 pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; UTF-8">
<title>Insert title here</title>
</head>
<body>
${message}
</body>
</html>

5.eclipse的目录结构图

6.访问http://localhost:8080/myweb/hello。输出：

you are welcome