Spring mvc 入门demo

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环境 Eclipse Jee Neon。

需要Spring MVC 的Jar包

Demo-01 ：

工程结构：

web.xml 文件内容：

<?xml version="1.0" encoding="UTF-8"?><web-app id="WebApp_ID" version="2.5"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_2_5.xsd">  <display-name>springmvc_demo_02</display-name>    <servlet>  <servlet-name>SpringMVC</servlet-name>    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>   <!-- 可以自定义servlet.xml配置文件的位置和名称，默认为WEB-INF目录下，名称为[<servlet-name>]-servlet.xml，如SpringMVC-servlet.xml  <init-param>   <param-name>contextConfigLocation</param-name>   <param-value>/WEB-INF/SpringMVC-servlet.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>    <welcome-file-list>    <welcome-file>index.jsp</welcome-file>  </welcome-file-list></web-app>

SpringMVC-servlet.xml 文件内容：

<?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:context="http://www.springframework.org/schema/context"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.xsd        http://www.springframework.org/schema/mvc        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"><context:component-scan base-package="org.springframework.samples.petclinic.web" /><bean name="/hello" class="com.feizi.controller.HelloController"></bean><bean id="viewResolver"class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/"></property><property name="suffix" value=".jsp"></property></bean></beans>

index.jsp 文件内容：

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <title>My JSP 'index.jsp' starting page</title>  </head>    <body>    This is my JSP page. <br>  </body></html>

hello.jsp 文件内容：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <title>My JSP 'hello.jsp' starting page</title>   </head>    <body>    <h3>shit , 这是hello.jsp</h3>  </body></html>

HelloController.java 文件内容：

package com.feizi.controller;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.Controller;@org.springframework.stereotype.Controllerpublic class HelloController  {@RequestMapping("hellonn")public ModelAndView handleRequest() throws Exception {System.out.println("wocao , 进入RequestMapping(\"hello\")...");System.out.println("shit");//实际上就是跳转到hello.jsp页面return new ModelAndView("/index");}}

demo-02 、 demo-03 与 demo-01 大同小异，关键不同部分;

@org.springframework.stereotype.Controllerpublic class HelloController  {@RequestMapping("index")public ModelAndView handleRequest() throws Exception {System.out.println("======================== IN  handlerRequest()...==============================");/*String firstParam = "第一个字符串参数";return new ModelAndView("/hello", "prm", firstParam);//字符串用*/        Map<String, Object> map = new HashMap<String, Object>();        map.put("prm1", "map中的第一个");        map.put("prm2", "map中的第二个");        map.put("prm3", "map中的第三个");        return new ModelAndView("/hello", "prm", map);}}

和

@Controllerpublic class HelloController {@RequestMapping(value="/hello",method=RequestMethod.GET)public String sayHello(){System.out.println("======================Hello World!!!================");//直接返回字符串，也是通过解析，映射到相应的hello.jsp。return "hello";}}

还有xxx-servlet.xml 文件的另一种配置方式：

<?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:context="http://www.springframework.org/schema/context"    xmlns:mvc="http://www.springframework.org/schema/mvc"    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.xsd        http://www.springframework.org/schema/mvc        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">    <!--  配置注解的支持    -->    <mvc:annotation-driven></mvc:annotation-driven>        <!--  启用自动扫描   -->    <context:component-scan base-package="com.feizi.controller"></context:component-scan>        <!--  配置视图解析器  -->    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <!--此处的前缀不再是/, 而是value="/WEB-INF/jsp/".         <property name="prefix" value="/"></property>         -->        <property name="prefix" value="/WEB-INF/jsp/"></property>        <!--  配置视图类型为jsp类型  -->        <property name="suffix" value=".jsp"></property>    </bean></beans>

3个工程的下载路径：http://download.csdn.net/my

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