SpringMVC——SpringMVC 的入門案例

時間 2019-11-19

原文原文鏈接

1.創建web 項目，導入SpringMVC 相關支持jar 包html

commons-logging-1.2.jar下載地址：https://commons.apache.org/proper/commons-logging/download_logging.cgijava

2.配置web.xml（重點）web

關鍵的步驟：配置核心控制器：Servletspring

 1   <!-- 配置SpringMVC核心控制器 -->
 2   <servlet>
 3       <servlet-name>DispatcherServlet</servlet-name>
 4       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 5   </servlet>
 6   
 7   <servlet-mapping>
 8       <servlet-name>DispatcherServlet</servlet-name>
 9       <url-pattern>*.action</url-pattern>
10   </servlet-mapping>

3.編寫spring-mvc.xmlapache

建議放在classpath瀏覽器

下面有一個mvc 的名稱空間：spring-mvc

SpringMVC的完整配置：mvc

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:context="http://www.springframework.org/schema/context"
 5     xmlns:mvc="http://www.springframework.org/schema/mvc"
 6     xsi:schemaLocation="http://www.springframework.org/schema/beans 
 7                         http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
 8                         http://www.springframework.org/schema/context 
 9                         http://www.springframework.org/schema/context/spring-context-4.3.xsd
10                         http://www.springframework.org/schema/mvc 
11                         http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
12 
13     <!-- 掃描Spring註解 -->
14     <context:component-scan base-package="cn.sm1234.controller"></context:component-scan>
15     
16 </beans>

修改web.xmlapp

 1   <!-- 配置SpringMVC核心控制器 -->
 2   <servlet>
 3       <servlet-name>DispatcherServlet</servlet-name>
 4       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 5   <!-- 參數，用於加載spring-mvc.xml -->
 6       <init-param>
 7           <param-name>contextConfigLocation</param-name>
 8           <param-value>classpath:spring-mvc.xml</param-value>
 9       </init-param>
10   </servlet>
11   
12   <servlet-mapping>
13       <servlet-name>DispatcherServlet</servlet-name>
14       <url-pattern>*.action</url-pattern>
15   </servlet-mapping>

4.編寫Controller 類測試jsp

 1 package cn.sm1234.controller;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 import org.springframework.web.servlet.ModelAndView;
 6 
 7 @Controller
 8 public class HelloController {
 9 
10     @RequestMapping("/hello")
11     public ModelAndView hello(){
12         System.out.println("執行 HelloController的 hello方法");
13         //把數據保存到 ModelAndView（至關於保存 request域對象）
14         ModelAndView mv = new ModelAndView();
15         mv.addObject("name", "Spring MVC");
16         //返回物理路徑
17         mv.setViewName("/WEB-INF/jsp/success.jsp");
18         return mv;
19     }
20 }

5.編寫頁面

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <%
 4     String path = request.getContextPath() + "/";
 5     String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path;
 6 %>
 7 <!DOCTYPE html>
 8 <html>
 9 <head>
10 <base href="<%=basePath%>" />
11 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
12 <title>第一個SpringMVC程序</title>
13 </head>
14 <body>
15 第一個SpringMVC程序
16 <hr>
17 ${name }
18 </body>
19 </html>