springMVC入門配置案例

時間 2019-12-11

原文原文鏈接

一、spring的jar包下載html

　　進入http://repo.springsource.org/libs-release-local/，而後依次點擊org/-->springframework-->spring，便可根據須要下載spring框架的壓縮包。前端

二、common-logging的jar包java

　　spring核心容器依賴common-logging的jar包，下載地址http://commons.apache.org，依次點擊Releases-->Logging，可選擇commons-logging-1.2-bin.zip下載。web

三、springMVC的DispatcherServletspring

　　DispatcherServlet是一個Servlet，繼承自HttpServlet。它是springMVC的前端控制器，用於攔截請求，與客戶端交互。apache

四、springMVC入門案例spring-mvc

　　環境搭建：創建dynamic web project，導入springMVC須要的jar包，在web.xml中配置springMVC前端控制器，編寫springMVC.xml核心配置文件，編寫controller。mvc

web.xml中配置springMVC前端控制器app

 1 <!-- 配置springMVC前段控制器 -->
 2   <servlet>
 3       <servlet-name>springMVC</servlet-name>
 4       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 5       <init-param>
 6           <param-name>contextConfigLocation</param-name>
 7           <param-value>/WEB-INF/springMVC.xml</param-value>
 8       </init-param>
 9       <!-- Tomcat啓動時加載該servlet -->
10       <load-on-startup>1</load-on-startup>
11   </servlet>
12   <servlet-mapping>
13       <servlet-name>springMVC</servlet-name>
14       <url-pattern>/</url-pattern>
15   </servlet-mapping>

核心配置文件springMVC.xml框架

 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.xsd
 8         http://www.springframework.org/schema/context
 9         http://www.springframework.org/schema/context/spring-context.xsd
10         http://www.springframework.org/schema/mvc
11         http://www.springframework.org/schema/mvc/spring-mvc.xsd">
12     
13     <!-- 配置@Controller註解掃描 -->
14     <context:component-scan base-package="com.alphajuns.controller"></context:component-scan>
15     <!-- 配置處理器映射器 -->
16     <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
17     <!-- 配置處理器適配器 -->
18     <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
19     <!-- 配置視圖解析器 -->
20     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"></bean>
21 </beans>

controller類

 1 package com.alphajuns.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(value="/hello")
11     public ModelAndView hello() {
12         // 建立模型和視圖對象
13         ModelAndView mv = new ModelAndView();
14         // 添加模型
15         mv.addObject("message", "Hello SpringMVC!");
16         // 設置視圖
17         mv.setViewName("/WEB-INF/content/welcome.jsp");
18         // 返回模型和視圖
19         return mv;
20     }
21 }

頁面的話主要是取值，可用el表達式，如welcome.jsp頁面

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html>
 4 <html>
 5 <head>
 6 <meta charset="UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10     ${requestScope.message }
11 </body>
12 </html>