1、第一个SpringMVC程序

1、创建如下项目结构

2、在src下的com.springmvc下创建User.java

 package com.springmvc;

 public class User {
     private String uname;

     public String getUname() {
         return uname;
     }

     public void setUname(String uname) {
         this.uname = uname;
     }

     @Override
     public String toString() {
         return "User [uname=" + uname + "]";
     }

 }

User.java

3、在src下的com.springmvc下创建MVCController.java

 package com.springmvc;

 import java.io.IOException;

 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;

 /**
  * @Controller 标注控制类，负责注册一个bean到spring上下文中
  * @RequestMapping 注解为控制器指定可以处理哪些 URL 请求
  * http://MVCController/hello
  *
  */
 @Controller
 public class MVCController {
     /*所有方法的return 返回的是页面视图的名称*/

     //1.自动匹配参数
     @RequestMapping("/hello.do")
     public String hello(HttpServletRequest request,HttpServletResponse response) throws IOException{
         //跳转页面
         return "/index.jsp";
     }
     //2.自动匹配参数,传递一个参数
     @RequestMapping("/login.do")
     public void login(HttpServletResponse response,String uname) throws IOException{
         //login的页面，uname是表单的name属性名
         System.out.println("登录通过String参数接用户名:"+uname);
         //跳转方式1：
             response.sendRedirect("index.jsp");
     }
     //2.自动匹配参数
     @RequestMapping("/register.do")
     public void test(HttpServletResponse response,User user) throws IOException{
         //register页面的name属性名只要和User类的属性名保持一致，这里参数拿对象接就好，
         //这里register页面的name属性名中不用写user.属性名，不能像stuts2注入对象一样
         System.out.println("登录通过User对象参数接用户名:"+user);
         //跳转方式1：
         response.sendRedirect("index.jsp");
     }

 }

MVCController.java

4、在WebRoot下的WEB-INF下创建springmvc-servlet.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:aop="http://www.springframework.org/schema/aop"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:tx="http://www.springframework.org/schema/tx"
 xmlns:mvc="http://www.springframework.org/schema/mvc"
 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.xsd
 http://www.springframework.org/schema/aop
 http://www.springframework.org/schema/aop/spring-aop.xsd
 http://www.springframework.org/schema/context
 http://www.springframework.org/schema/context/spring-context.xsd
 http://www.springframework.org/schema/tx
 http://www.springframework.org/schema/tx/spring-tx.xsd
 http://www.springframework.org/schema/mvc
 http://www.springframework.org/schema/mvc/spring-mvc.xsd ">
   <!--  1.配置要自动扫描的包 -->
   <context:component-scan base-package="com.springmvc"/>

   <!-- 2.支持spingmmvc注解,自动匹配 -->
   <mvc:annotation-driven/>

   <!-- 3.如果当前请求为“/”时，则转发到“mvc/hello” 也就是默认首启项的设置,web.xml欢迎页面节点可以啥也不写-->
   <!-- <mvc:view-controller path="/" view-name="forward:/mvc/hello"/> -->

 </beans>

springmvc-servlet.xml

5、编辑WebRoot下的WEB-INF下的web.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app version="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/javaee
     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
     <!-- SpringMVC的配置 -->
     <servlet>
       <servlet-name>springmvc</servlet-name>

       <!-- DispatcherServlet是前置控制器，配置在web.xml文件中的。拦截匹配的请求，
       Servlet拦截匹配规则要自已定义，把拦截下来的请求，依据相应的规则分发到目标Controller来处理， -->
       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
     </servlet>
     <servlet-mapping>
       <servlet-name>springmvc</servlet-name>
       <url-pattern>*.do</url-pattern>
     </servlet-mapping>

     <welcome-file-list>
       <welcome-file></welcome-file>
     </welcome-file-list>
 </web-app>

web.xml

6、在WebRoot下创建login.jsp

 <%@ 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>
     <base href="<%=basePath%>">

     <title>My JSP 'index.jsp' starting page</title>
     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
     <link rel="stylesheet" type="text/css" href="styles.css">
     -->
   </head>

   <body>
      <form action="login.do" method="post">
        user:<input type="text" name="uname"/>
        <input type="submit" value="ok"/>
      </form>
   </body>
 </html>

login.jsp

7、在WebRoot下创建register.jsp

 <%@ 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>
     <base href="<%=basePath%>">

     <title>My JSP 'index.jsp' starting page</title>
     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
     <link rel="stylesheet" type="text/css" href="styles.css">
     -->
   </head>

   <body>
      <form action="register.do" method="post">
        user:<input type="text" name="uname"/>
        <input type="submit" value="ok"/>
      </form>
   </body>
 </html>

register.jsp

8、在WebRoot下创建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>
     <base href="<%=basePath%>">

     <title>My JSP 'login.jsp' starting page</title>

     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
     <link rel="stylesheet" type="text/css" href="styles.css">
     -->

   </head>

   <body>
      操作成功！
   </body>
 </html>

index.jsp

9、运行效果如下

(1)直接通过浏览器访问hello.do

(2)登录时，后台用String参数名接值

(3)注册时，后台用User对象参数接值