文章目录
- 1.模块创建
- 1.创建一个webapp的maven项目
- 2.目录结构
- 2.代码
- 1.HomeController.java
- 2.home.jsp
- 3.applicationContext.xml Spring配置文件
- 4.spring-mvc.xml SpringMVC配置文件
- 5.web.xml 配置中央控制器以及Spring和SpringMVC配置文件的路径
- 6.index.jsp
- 3.配置Tomcat
- 1.配置路径以及热加载
- 2.配置war包以及上下文路径为/
- 3.启动
-
- 4.初始化基本流程解析
1.模块创建
1.创建一个webapp的maven项目
2.目录结构
2.代码
1.HomeController.java
package com.example.controller;import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HomeController {@RequestMapping("/home")public String home(Model model) {System.out.println("SpringMVC 执行了 home() 方法");model.addAttribute("message", "Hello, SpringMVC!");return "home"; }
}
2.home.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head><meta charset="UTF-8"><title>SpringMVC Demo</title>
</head>
<body>
<h2>${message}</h2>
</body>
</html>
3.applicationContext.xml Spring配置文件
<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"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"><context:component-scan base-package="com.example.service"/></beans>
4.spring-mvc.xml SpringMVC配置文件
<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.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"><mvc:annotation-driven/><context:component-scan base-package="com.example.controller"/><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/views/"/><property name="suffix" value=".jsp"/></bean></beans>
5.web.xml 配置中央控制器以及Spring和SpringMVC配置文件的路径
<?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"><servlet><servlet-name>dispatcher</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>dispatcher</servlet-name><url-pattern>/</url-pattern></servlet-mapping><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><context-param><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/applicationContext.xml</param-value></context-param>
</web-app>
6.index.jsp
<html>
<body>
<h2>Hello World!</h2>
</body>
</html>
3.配置Tomcat
1.配置路径以及热加载
2.配置war包以及上下文路径为/
3.启动
1.首页
2.访问 /home
4.初始化基本流程解析
- Tomcat启动，读取web.xml，装载中央控制器以及获取Spring以及SpringMVC的配置文件路径
- 由于中央控制器配置了load-on-startup所以会调用中央控制器的init方法完成Spring以及SpringMVC容器的初始化
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