springMVC学习笔记（一）----------新建springMVC项目

最新推荐文章于 2024-08-08 10:08:24 发布

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#springMVC

本文介绍了一个简单的Spring MVC应用实例，包括必要的Maven依赖、控制器类的创建、springMVC.xml配置文件的设置以及web.xml中的相关配置。通过这些步骤，实现了用户请求与视图页面的映射。

一、首先导包

导入 maven 依赖，pom.xml

                <dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>4.3.17.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context-support</artifactId>
			<version>4.3.17.RELEASE</version>
		</dependency>

二、新建一个实现 controller 接口的类

package com.lwj.controller;

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 FirstController implements Controller {

	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
		// TODO Auto-generated method stub
		ModelAndView mv = new ModelAndView();
		// 其实底层执行的是request.setAttribute()方法
		mv.addObject("name", "张三");
		// 添加视图名称：路径+文件名
		mv.setViewName("/WEB-INF/jsp/welcome.jsp");
		//返回后将自动跳转到该页面
		return mv;
	}

}

三、新建 springMVC.xml 文件

<?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:context="http://www.springframework.org/schema/context"
        xmlns:aop="http://www.springframework.org/schema/aop"
        xmlns:tx="http://www.springframework.org/schema/tx"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
        xsi:schemaLocation="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.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.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">
        //注册处理器
        <bean class="com.lwj.controller.FirstController" id="/firstController.action"></bean>
</beans>

四、在 web.xml 中添加代码

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
	<display-name>Archetype Created Web Application</display-name>
	<servlet>
                <!-- 需要加载的 springMVC 文件 -->
                <servlet-name>springMVC</servlet-name>
                <!-- 对应的java类 -->
                <servlet-class>
			org.springframework.web.servlet.DispatcherServlet
	        </servlet-class>

    </servlet>

<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springMVC.xml</param-value>
</init-param>

<load-on-startup>1</load-on-startup> </servlet> 
<servlet-mapping>  <servlet-name>springMVC</servlet-name>  <url-pattern>*.action</url-pattern>
</servlet-mapping>
</web-app>

最后在浏览器中请求 /firstController 就可以跳转到 /WEB-INF/jsp/welcome.jsp 页面