SpringMVC开发之HelloWorld案例以及分析

最新推荐文章于 2023-05-25 09:31:06 发布

huacai2010

最新推荐文章于 2023-05-25 09:31:06 发布

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本文链接：https://blog.youkuaiyun.com/huacai2010/article/details/27960259

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第一步：建立一个web项目，搭建项目的基本框架

第二步：添加支持包

第三步：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>	
  <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>
  		<init-param>
  			<param-name>contextConfigLocation</param-name>
  			<param-value>classpath*:com/hcw/config/spring-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>
</web-app>

第四步：spring-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" 
    xmlns:p="http://www.springframework.org/schema/p"
    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-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">
      
      
      <bean name="/login" class="com.hcw.web.controller.LoginController">
      </bean>
      
      <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      	<property name="suffix" value=".jsp"/>
      	<property name="prefix" value="/"/>
      </bean>
</beans>

第五步：LoginController.java

package com.hcw.web.controller;

import java.util.HashMap;
import java.util.Map;

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

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

public class LoginController implements Controller {

	@Override
	public ModelAndView handleRequest(HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		System.out.println("login success");
		
		Map<String, String> map = new HashMap<String, String>();
		map.put("201", "张三");
		map.put("202", "李四");
		map.put("203", "王五");
		return new ModelAndView("index","map",map);
		
	}

}

第六步：index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>


<%
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>
    登录成功！
  <br> 
    <c:forEach items="${map}" var="m">
    	${m.key } ----> ${m.value } <br>
    </c:forEach>
  </body>
</html>

第七步：打开浏览器，在地址栏输入： http://localhost:8080/SpringMVC/login

第八步：结果

Console控制台打印login success

页面输出结果：

分析：项目的大致运行原理图（个人理解，可能有误差，望指正）