springMVC-springMVC入门实例

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spring mvc框架通过model-view-controller模式来更好的将数据，业务，与展现进行分类，从这样一个角度说，springmvc 和struts2非常相似的

spring mvc的是设计师围绕dispatcherServlet展开的，dispatcherServlet负责将请求派发给特定的handler通过配置handlermapping，handlermapping将传给对应的controller,controller返回modelandview，moviewResolution来处理请求并且转到对应的视图。

整体的流程如图：

springmvc helloworld

整体目录结构

1.配置web.xml。此处是配置dispathverServlet。dispatcherServlet把请求给转发到具体的控制类。

<?xmlversion="1.0" encoding="UTF-8"?><web-appversion="2.5"xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><!-- 中央转发器dispacherServlet-->  <servlet>         <servlet-name>springmvc</servlet-name>         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  </servlet>  <servlet-mapping>         <servlet-name>springmvc</servlet-name>         <url-pattern>*.do</url-pattern>  </servlet-mapping></web-app>

2.在webRoot/Web-INFO下新建springmvc-servlet.xml文件。配置controller,handlermapping,viewResolver,interceptor。

<pre name="code" class="html"><?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:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"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-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.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 "><!-- 配置文件:配置组件controller,handlermapping(有默认规则，viewResolver,interceptor)--><!-- 视图解析器 viewResolver--><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><!-- 配置从项目根目录到指定目录一端路径，此目录表示访问前段路径为/WEB-INF/jsp/的jsp文件 --><property name="prefix" value="/WEB-INF/jsp/"></property><!-- 文件的后缀名为jsp --><property name="suffix" value=".jsp"></property></bean><!-- 配置controller --><bean id="testController" name="/hello.do" class="com.roy.controller.TestController"/></beans>

需要注意的地方是此配置文件的命名要与web.xml中配置的servlet-name节点的名称相同。

3.写controller,modelAndView会被视图解析器解析自动加上前缀和后缀。

package com.roy.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 TestController extends AbstractController {@Overrideprotected ModelAndView handleRequestInternal(HttpServletRequest arg0,HttpServletResponse arg1) throws Exception {System.out.println("hello controller");//modelAndView会被视图解析器解析自动加上前缀和后缀，/WEB-INF/jsp/index.jspreturn new ModelAndView("index");}}

4.index.jsp,mvc中的view.

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><%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>  </head>    <body>    hello springmvc <br>  </body></html>

接下来部署到部署就可以了。

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