SpringMVC4 Hello World源码案例下载
Spring的web模型 - 视图 - 控制器（MVC）框架提供了一个模型 - 视图 - 控制器架构，可用于开发灵活的，松散耦合的Web应用程序。
框架是围绕DispatcherServlet 为核心处理http，处理步骤如下：
- DispatcherServlet 接受一个请求
- DispatcherServlet使用HandlerMapping 调用相应的控制器
- 控制器获得请求，基于GET or POST 方式调用相应的服务方法，.服务方法将设置我们定义的业务模型，返回视图名称给DispatcherServlet.
- DispatcherServlet将从ViewResolver获得帮助，挑选出这个请求的视图
- DispatcherServlet传送模型数据给视图，视图最后渲染输出给浏览器
主要步骤如下：
1.在项目目录创建Maven依赖pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.javacodegeeks.snippets.enterprise</groupId>
<artifactId>springexample</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>springexample Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
</dependencies>
<build>
<finalName>springexample</finalName>
</build>
<properties>
<spring.version>4.0.2.RELEASE</spring.version>
</properties>
</project>
2.创建控制器代码：
@Controller
@RequestMapping("/helloWorld")
public class HelloWorldController {
@RequestMapping(method = RequestMethod.GET)
public String hello(ModelMap model) {
model.addAttribute("name", "JCG Hello World!");
return "helloWorld";
}
}
3.创建视图:
<html>
<body>
<h1>Spring 4.0.2 MVC web service</h1>
<h3>Name : ${name}</h3>
</body>
</html>
4.配置Spring:
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>Archetype Created Web Application</display-name>
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
mvc-dispatcher-servlet.xml的配置：
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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">
<context:component-scan base-package="com.javacodegeeks.snippets.enterprise" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>