Spring MVC 的初步应用

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1.首先导入所需的 jar包

2.在web.xml里配置前端控制器和拦截器

<?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>springMVC</display-name>  <welcome-file-list>    <welcome-file>index.html</welcome-file>    <welcome-file>index.htm</welcome-file>    <welcome-file>index.jsp</welcome-file>    <welcome-file>default.html</welcome-file>    <welcome-file>default.htm</welcome-file>    <welcome-file>default.jsp</welcome-file>  </welcome-file-list>     <!-- 配置前端控制器 -->  <servlet>     <servlet-name>springmvc2</servlet-name>     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>     <init-param>       <param-name>contextConfigLocation</param-name>       <param-value>classpath:springmvc.xml</param-value>     </init-param>     <load-on-startup>1</load-on-startup>  </servlet>  <servlet-mapping>     <servlet-name>springmvc2</servlet-name>     <url-pattern>*.action</url-pattern>    <!--配置的访问路径，一定是按照这种格式写  -->  </servlet-mapping></web-app>

3.配置SpringMVC

3.1 方法一手动配置

springmvc.xml

<?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:p="http://www.springframework.org/schema/p"    xmlns:mvc="http://www.springframework.org/schema/mvc"    xmlns:context="http://www.springframework.org/schema/context"    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.xsd">         <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter">   </bean>   <bean id="/hello.action" class="com.smvc.action.HController"> </bean>                 <pre name="code" class="html">   <!-- <span style="font-family: Arial, Helvetica, sans-serif;"> 配置处理映射器 </span><span style="font-family: Arial, Helvetica, sans-serif;"> --></span>

HController.java

package com.smvc.action;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.Controller;public class HController implements Controller{@Overridepublic ModelAndView handleRequest(HttpServletRequest requset,HttpServletResponse response) throws Exception {ModelAndView m=new ModelAndView();   //向页面传数据..m.addObject("hello","haha");m.setViewName("/index.jsp");return m;}}

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <title>springMVC</title>  </head>  <body>    ${hello}<br>  </body></html>

3.2 方法二用扫描和注释

web.xml 不变

springmvc.xml

<?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:p="http://www.springframework.org/schema/p"    xmlns:mvc="http://www.springframework.org/schema/mvc"    xmlns:context="http://www.springframework.org/schema/context"    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.xsd">       <context:annotation-config>           <mvc:annotation-driven>           </mvc:annotation-driven>    </context:annotation-config>       <!-- 用扫描的方式把包加入到bean 中 -->    <context:component-scan base-package="com.smvc.action"></context:component-scan>    <!-- 引入解析jstl的类 -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"></bean></beans>

testAction.java

package com.smvc.action;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.ModelAndView;@Controllerpublic class testAction {/* * 注释方法 */@RequestMapping(value="/test.action")  //地址映射的注释public ModelAndView gettest(){ModelAndView m=new ModelAndView();   //向页面传值用。。。m.addObject("hello", "leaf");m.setViewName("/index.jsp");return m;}}

jsp页面同上

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