- 建構1個maven項目
Spring MVC基礎（一）：HelloWorld案例 - pom.xml
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>RELEASE</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
</dependency>
</dependencies>
- 建立webapp目錄
Spring MVC基礎（一）：HelloWorld案例 - 建立web.xml
Spring MVC基礎（一）：HelloWorld案例 Spring MVC基礎（一）：HelloWorld案例 Spring MVC基礎（一）：HelloWorld案例
<?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>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-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>
- webapp目錄下建立jsp目錄，建立hello.jsp
Spring MVC基礎（一）：HelloWorld案例
<%--
Created by IntelliJ IDEA.
User: sang
Date: 2021/2/5
Time: 21:23
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
hello ${name}!
</body>
</html>
<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
<!--首先配置一個 MyController 的執行個體-->
<bean class="com.ychen.mvc.controller.MyController" name="/hello"/>
<!--配置處理器映射器，将前端請求和後段的接口關聯起來-->
<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" id="handlerMapping">
<property name="beanName" value="/hello"/>
</bean>
<!--處理器擴充卡-->
<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" id="handlerAdapter"/>
<!--視圖解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="viewResolver">
<property name="prefix" value="/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
public class MyController implements Controller {
/**
* 這個方法用來處理請求
* @param request 這個就是前端發送來的請求
* @param response 這個就是服務端給前端的響應
* @return 傳回 ModelAndView，Model 就相當于我們的 資料模型，View 則是視圖
* @throws Exception
*/
@Override
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
// 建立1個視圖hello，并添加資料，最後傳回
ModelAndView mv = new ModelAndView("hello");
mv.addObject("name", "javaboy");
return mv;
}
}
Spring MVC基礎（一）：HelloWorld案例 - 配置tomcat
Spring MVC基礎（一）：HelloWorld案例 Spring MVC基礎（一）：HelloWorld案例 - 啟動測試
- 工作流程如下
# 前端通路url，去找對應的bean
<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" id="handlerMapping">
<property name="beanName" value="/hello"/>
</bean>
# 找到對應的bean
<bean class="org.javaboy.springmvc01.controller.MyController" name="/hello"/>
# 在對應的bean中建立視圖模式
@Override
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
// 建立1個視圖hello，并添加資料，最後傳回
ModelAndView mv = new ModelAndView("hello");
mv.addObject("name", "javaboy");
return mv;
}
# 解析前字尾
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="viewResolver">
<property name="prefix" value="/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
# 找到對應的jsp頁面
