1、新建maven项目
参考mybatis学习笔记（五） -- maven+spring+mybatis从零开始搭建整合详细过程（上）第一部分，修改配置
2、修改pom.xml 文件
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.lmei.springmvc</groupId>
<artifactId>springmvc01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>4.3.0.RELEASE</spring.version>
</properties>
<dependencies>
<!-- 添加Spring-core包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!-- 添加spring-context包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!-- 添加spring-jdbc包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!-- 添加spring-test包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!-- 添加spring-web包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!--添加spring-webmvc包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
</project>
在加载包的过程中，出现下载失败的情况，找到存放位置，将下载jar失败的文件夹删掉，重新保存pom.xml让其重新下载。
出现重复多次操作，依然下载失败的情况，网上找了一些解决方法，比如直接使用maven install还是失败，最后重新开了一个工作空间，在另外一个工作空间建了个新的maven项目，然后把加载失败的包的配置复制到那边的pom.xml，可以下载成功。然后原项目的pom.xml重新保存后，项目不再报错。所以如果遇到同样的情况，可以试下用这种方法。
3、新建包，创建一个controller类
package com.lmei.springmvc01.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
//@Controller是为了让Spring IOC容器初始化时自动扫描到；
//@RequestMapping是为了映射请求路径
@Controller
@RequestMapping("/Hello")
public class HelloWorld {
@RequestMapping("/SayHello")
public String SayHi(Model model) {
model.addAttribute("message", "Hello Spring MVC!");
return "hello"; //返回视图
}
}
4、在WEB-INFO下创建一个文件夾view，然后在里面创建一个jsp文件，命名为hello.jsp
hello.jsp的代码如下：(webapp/WEB-INFO/view/hello.jsp)
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Hello Spring MVC!</title>
</head>
<body>
<h2>${message}</h2>
</body>
</html>
index.jsp代码如下： (webapp/index.jsp)
<%@ 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>
hello
</body>
</html>
5、添加springmvc-servlet.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: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-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
<!-- 自动扫描包，实现支持注解的IOC -->
<context:component-scan base-package="com.lmei.springmvc01" />
<!-- spring mvc不处理静态资源 -->
<mvc:default-servlet-handler />
<!-- 支持mvc注解驱动 -->
<mvc:annotation-driven />
<!-- 视图解析器 -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
id="internalResourceViewResolver">
<!-- 前缀 -->
<property name="prefix" value="/WEB-INF/view/" />
<!-- 后缀 -->
<property name="suffix" value=".jsp" />
</bean>
</beans>
6、修改web.xml
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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">
<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*: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>
</web-app>
7、测试
项目右键->Run As->Run On Server->Tomcat...
启动时间可能比较长，默认的“start-timeout=45”，修改下时间长度
工作空间下的 metadata/.plugins/org.eclipse.wst.server.core/servers.xml 文件，修改时间，比如改成450
start-timeout="450"
保存后，重新启动，成功运行，默认跳到index.jsp页面
在浏览器输入：http://localhost:8888/springmvc01/Hello/SayHello
时间： 2024-12-20 09:05:12