Spring MVC（一）登陆界面获取用户名和密码并跳转其它页面

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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.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>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.org/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>

三、在WebContent目录下创建文件夹view，里面用于渲染的jsp界面，并在里面新建index.jsp用于渲染：

<%@ 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.org/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 {@Overrideprotected 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.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"xsi:schemaLocation="http://www.springframework.org/schema/mvc                    http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd    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-3.0.xsd"><!-- 配置HandlerMapping  根据benaname找到对应Conntroller  --><beanclass="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>

运行结果：

点击提交后在index.jsp进行渲染

后台并输出：

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