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
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" ;
}
}
< % @ 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>
< beansxmlns = " 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.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd" > < context: component-scanbase-package = " com.example.service" /> </ beans> < beansxmlns = " 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.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd" > < mvc: annotation-driven/> < context: component-scanbase-package = " com.example.controller" /> < beanclass = " org.springframework.web.servlet.view.InternalResourceViewResolver" > < propertyname = " prefix" value = " /WEB-INF/views/" /> < propertyname = " suffix" value = " .jsp" /> </ bean> </ beans> <?xml version="1.0" encoding="UTF-8"?>
< web-appxmlns = " 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> </ servlet-name> < servlet-class> </ servlet-class> < init-param> < param-name> </ param-name> < param-value> </ param-value> </ init-param> < load-on-startup> </ load-on-startup> </ servlet> < servlet-mapping> < servlet-name> </ servlet-name> < url-pattern> </ url-pattern> </ servlet-mapping> < listener> < listener-class> </ listener-class> </ listener> < context-param> < param-name> </ param-name> < param-value> </ param-value> </ context-param> </ web-app> < html> < body> < h2> Hello World ! < / h2>
< / body>
< / html>
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
