SpringMVC的HelloWorld实现

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1.首先我们需要新建一个webapp项目，在pom.xml中引入相关依赖：

<!-- junit测试包 --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency><!-- spring基础包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.1.6.RELEASE</version></dependency><!-- springMVC的包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>4.1.6.RELEASE</version></dependency>

2.在web.xml中配置DispatcherServlet:

<!-- 配置springmvc的DispatcherServlet处理类 --><servlet><servlet-name>mvc-dispatcher</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><!-- 配置springmvc的DispatcherServlet映射处理URL --><servlet-mapping><servlet-name>mvc-dispatcher</servlet-name><url-pattern>/</url-pattern></servlet-mapping>

3.引入springmvc.xml文件，文件名字随意，但是要与上面web.xml中配置的classpath名字相同

<?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:p="http://www.springframework.org/schema/p"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-3.0.xsd              http://www.springframework.org/schema/context              http://www.springframework.org/schema/context/spring-context-3.0.xsd             http://www.springframework.org/schema/mvc              http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"><!-- 自己扫描bean --><context:component-scan base-package="com.yc" /><!-- jsp页面解析器，当Controller返回XXX字符串时，先通过拦截器，然后该类就会在/views/目录下，查找XXX.jsp文件 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/views/" /><property name="suffix" value=".jsp" /></bean></beans>

4.发出请求

<a href="mvc/hello">Hello</a>

5.编写请求处理类Controller

package com.yc.controllers;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controller //标识为请求处理类@RequestMapping("/mvc") //拦截/mvc的请求public class HelloController {@RequestMapping("/hello") //拦截/hello的请求public String hello(){return "show"; //跳转到show.jsp页面}}

6.运行结果

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