在idea中使用maven的webapp 模板创建spring mvc项目-1(推荐使用)

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一.介绍说明

本案例使用maven的webapp模板创建springmvc 项目，打成war包，部署到tomcat下执行。

总目录结构：

二.实现案例

2.1 创建工程：01-springmvc-demo

创建完成后，目录结构，如下：src/main/java 是自动生成的，如果java不是蓝色的package类型，需要file---》project structure -----》module -》选中java目录，设置为source，就会变成蓝色的package类型了。

2.2 配置pom依赖

 <dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><!--spring mvc的jar包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.1.9.RELEASE</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.8</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.2.1-b03</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>4.0.1</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId><version>1.1.2</version></dependency>

2.3 配置WEB-INF下的web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"version="4.0"><!--DispatcherServlet--><servlet><servlet-name>DispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>DispatcherServlet</servlet-name><url-pattern>/</url-pattern></servlet-mapping><!--encodingFilter--><filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>utf-8</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping></web-app>

2.4 配置WEB-INF下新建一个存储jsp的views文件夹，且编写login.jsp页面的内容

login.jsp页面的内容如下：

<%--Created by IntelliJ IDEA.User: jurflDate: 2020/9/12Time: 11:36To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>helloworld</title>
</head>
<body>
<h2>${helloMsg}</h2>
<div><img src="${pageContext.request.contextPath}/static/images/aa.jpg"></img>
</div>
</body>
</html>

2.5 新建一个存储图片的目录

在webapp下，新建一个static文件夹，下面用于存储图片

2.6 在resouces下编写applicationContext内容

<?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:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttps://www.springframework.org/schema/mvc/spring-mvc.xsd"><!-- 1.开启SpringMVC注解驱动 --><mvc:annotation-driven /><!-- 2.静态资源默认servlet配置--><mvc:default-servlet-handler/><!-- 3.配置jsp 显示ViewResolver视图解析器 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /><property name="prefix" value="/WEB-INF/views/" /><property name="suffix" value=".jsp" /></bean><!-- 4.扫描web相关的bean --><context:component-scan base-package="com.test" /></beans>

2.7 编写controller内容

编写一个userController的内容，跳转到login页面

package com.test.controller;import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;/*** @ClassName: UserController* @Description: TODO* @Author: liujianfu* @Date: 2020/09/12 11:34:11 * @Version: V1.0**/
@Controller
public class UserController {@RequestMapping("/index")public String index(Model model){model.addAttribute("helloMsg","HelloWorld,你好世界");return "login";}
}

2.8 编写index.jsp页面的内容

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"><title>spring-mvc：登录页面</title>
</head>
<body>
<h2>欢迎登录</h2>
<div>
<a href="${pageContext.request.contextPath}/index">去主页</a>
</div>
</body>
</html>