SpringMVC实现操作的第二种方式

一：

运行效果：

点击提交之后显示效果

二：

(1).web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
    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_3_0.xsd">
  <display-name></display-name>
  <!-- 解决post请求中文乱码问题 -->
  <filter>
      <filter-name>CharaterEncodingFilter</filter-name>
      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
      <init-param>
          <param-name>endcoding</param-name>
          <param-value>utf-8</param-value>
      </init-param>
  </filter>
  <filter-mapping>
      <filter-name>CharaterEncodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>

  <servlet>
      <!--  配置前端过滤器 -->
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
       <!-- 表示容器再启动的时候立即记载Servlet -->
    <init-param>
           <param-name>contextConfigLocation</param-name>
           <param-value>classpath: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>

(2)springmvc-servlet.xml(都是第二种的方法:标有数字2的)

<?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-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd" >

    <!-- 配置处理器Handle-->
    <bean name="/firstController" class="com.inspur.controller.FirstController">
    </bean>

    <!-- Handler2 -->
    <bean id="login" class="com.inspur.controller.LoginController"></bean>

    <!-- 处理映射器，将处理器Handle的name作为url进行查找 -->
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>

    <!-- Handler处理方法2 -->
    <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="/login1">login</prop>
            </props>
        </property>
    </bean>

    <!-- 处理适配器2 -->
    <bean class="org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter"></bean>

    <!-- 视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="ViewClass" value="org.springframework.web.servlet.view.JstlView"></property>
        <!-- <property name="prefix" value="/WEB-INF/jsp/"></property>
        <property name="suffix" value=".jsp"></property> -->
    </bean>

</beans>

(3)LoginController.java

package com.inspur.controller;

import java.io.IOException;

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

import org.springframework.web.HttpRequestHandler;

public class LoginController implements HttpRequestHandler {

    @Override
    public void handleRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        // TODO Auto-generated method stub
        String username = request.getParameter("username");
        String password = request.getParameter("password");

        request.setAttribute("username", username);
        request.setAttribute("password", password);

        //请求成功，登陆login.jsp页面，获取uername和password的值
        request.getRequestDispatcher("/login.jsp").forward(request, response);

    }

}

(4)Login.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>
    <form action="login1" method="post">
         用户名： <input type="text" name="username">${username }<br>
         密码：<input type="text" name="password">${password }<br>
         <input type="submit" value="提交">
    </form>
  </body>
</html>

三：运行流程

1.输入jsp页面的路径：http://localhost:8080/SpringMVCTest01/login.jsp

2.web.xml前端控制器DispacherServlet会拦截浏览器

3.调用spring-servlet.xml，查找login。这时候找

4.prop的login会找到对应id为login的bean

5.调用bean里面的LoginController控制器