实现Spring MVC的入门，在登陆界面填写用户名和密码，提交后获取用户名和密码跳转到另一个页面
一、新建一个JAVA WEB项目，并导入Spring的相关JAR包,并在web.xml中声明拦截器DispatcherServlet
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3/2001/XMLSchema-instance" xmlns="http://java.sun/xml/ns/javaee" xsi:schemaLocation="http://java.sun/xml/ns/javaee http://java.sun/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>springmvc01</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<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>/</url-pattern>
</servlet-mapping>
</web-app>二、在WebContent下创建hello.jsp页面，发出请求：
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<form action="index.do" method="post">
用户名:<input type="text" name="username"/>
密 码:<input type="text" name="password">
<input type="submit" value="提交"/>
</form>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<table border="1">
<tr>
<th>用户名</th>
<th>密码</th>
</tr>
<tr>
<td>${username }</td>
<td>${password }</td>
</tr>
</table>
</body>
</html>四、创建控制器HelloController 继承AbstractController重写handleRequestInternal：
package com.liu.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 HelloController extends AbstractController {
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
String username = request.getParameter("username");
String password = request.getParameter("password");
System.out.println("----:"+username);
System.out.println("----:"+password);
//在index.jsp页面进行渲染
ModelAndView mav = new ModelAndView("index");
mav.addObject("username", username);
mav.addObject("password", password);
return mav;
}
}
五、在WEB-INF下创建Spring配置文件，命名规则是【servlet-name】-servlet.xml，所以根据web.xml中可知，我们在WEB-INF下面创建springmvc-servlet.xml配置文件，在里面配置控制器和视图解析器
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework/schema/beans"
xmlns:xsi="http://www.w3/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework/schema/mvc"
xmlns:context="http://www.springframework/schema/context"
xsi:schemaLocation="http://www.springframework/schema/mvc
http://www.springframework/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework/schema/beans
http://www.springframework/schema/beans/spring-beans.xsd
http://www.springframework/schema/context
http://www.springframework/schema/context/spring-context-3.0.xsd">
<!-- 配置HandlerMapping 根据benaname找到对应Conntroller -->
<bean
class="org.springframework.web.servlet.mvc.support.ControllerBeanNameHandlerMapping">
</bean>
<!-- 配置Controller，在hello.jsp页面的action等于这里的name，表示交由该控制器处理 -->
<bean name="index.do" class="com.liu.controller.HelloController"></bean>
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 前缀 -->
<property name="prefix" value="/view/"></property>
<!-- 后缀 -->
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
点击提交后在index.jsp进行渲染
后台并输出：
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