Spring MVC3入门之2 Hello World(Annotationed)

前一节Spring MVC3入门之1 Hello World(XML based) ,本章同样基于其环境版本。

对比性的截图贴代码,比较一下纯XML based和Annotationed两个版本的优点和缺点。

1.New Maven Project

Spring MVC3入门之2 Hello World(Annotationed)_第1张图片
2.New Maven Project选择maven-archetype-webapp

Spring MVC3入门之2 Hello World(Annotationed)_第2张图片
3.接下来Group Id , Artifact Id ,Version

Spring MVC3入门之2 Hello World(Annotationed)_第3张图片
 4.点Finish。接下来,maven引入以下dependencies。

 

spring-webmvc选择3.0.5.RELEASE版本

taglibs standard选择1.1.2版本

这里会要用到cglib,选择2.2.2版本

单元测试junit这次不会涉及到,去掉了。

至于maven如何引入,后面在maven系列中会详细介绍。

好了,最终pom.xml长这样。

 

<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.nanigac.springmvc</groupId>
	<artifactId>HelloWorldAnnotationed</artifactId>
	<packaging>war</packaging>
	<version>1.0.0-SNAPSHOT</version>
	<name>HelloWorldAnnotationed Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<dependencies>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring-webmvc.version}</version>
		</dependency>
		<dependency>
			<groupId>taglibs</groupId>
			<artifactId>standard</artifactId>
			<version>${taglibs.version}</version>
		</dependency>
		<dependency>
			<groupId>cglib</groupId>
			<artifactId>cglib</artifactId>
			<version>${cglib.version}</version>
		</dependency>
	</dependencies>
	<build>
		<finalName>HelloWorldAnnotationed</finalName>
	</build>
	<properties>
		<spring-webmvc.version>3.0.5.RELEASE</spring-webmvc.version>
		<taglibs.version>1.1.2</taglibs.version>
		<cglib.version>2.2.2</cglib.version>
	</properties>
</project>

5.接下来,web.xml长这样。嗯,这里也是2.5版本的。

 

<?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_2_5.xsd"
	id="WebApp_ID" version="2.5">

	<servlet>
		<servlet-name>mvc-dispatcher</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextClass</param-name>
			<param-value>
				org.springframework.web.context.support.AnnotationConfigWebApplicationContext
            </param-value>
		</init-param>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>com.nanigac.springmvc.context.HelloWorldContext</param-value>
		</init-param>
	</servlet>

	<servlet-mapping>
		<servlet-name>mvc-dispatcher</servlet-name>
		<url-pattern>*.htm</url-pattern>
		<url-pattern>/helloworld.htm</url-pattern>
	</servlet-mapping>

	<welcome-file-list>
		<welcome-file>helloworld.htm</welcome-file>
	</welcome-file-list>
</web-app>

 大家注意XML based和Annotationed版本的<servlet></servlet>处的区别。

6.XML based版本,此处是mvc-dispatcher-servlet.xml,这里换成com.nanigac.springmvc.context.HelloWorldContext.java,代码是这样。

 

package com.nanigac.springmvc.context;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import com.nanigac.springmvc.controller.HelloWorldController;

@Configuration
public class HelloWorldContext {

	@Bean
	public DefaultAnnotationHandlerMapping defaultAnnotationHandlerMapping() {
		return new DefaultAnnotationHandlerMapping();
	}

	@Bean
	public InternalResourceViewResolver internalResourceViewResolver() {
		InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
		viewResolver.setPrefix("/WEB-INF/pages/");
		viewResolver.setSuffix(".jsp");
		return viewResolver;
	}

	@Bean
	public HelloWorldController HelloWorldController() {
		return new HelloWorldController();
	}
}

7.接下来,在src\main\下新建java source folder,接着在src\main\java\下创建Package:com.nanigac.springmvc.controller,并新建HelloWorldController,长这样。

 

package com.nanigac.springmvc.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/helloworld")
public class HelloWorldController {

	@RequestMapping(method=RequestMethod.GET)
	public ModelAndView helloWorld() {

		ModelAndView model = new ModelAndView("HelloWorld");
		model.addObject("message", "Hello World!");
 
		return model;
	}
}

8.接下来,移动index.asp到/WEB-INF/pages/下并rename为HelloWorld.jsp,编辑成这样。

 

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<body>

<h1>${message}</h1>

</body>
</html>

9.最终Project Explorer里面项目结构长这样。

Spring MVC3入门之2 Hello World(Annotationed)_第4张图片
10.好吧,大功告成。选择Run AS  maven clean,Run AS maven package,成功以后可以在target目录下找到HelloWorldAnnotationed.war。拷贝到%TOMCAT_HOME%/webapps/下,运行tomcat,http://localhost/HelloWorldAnnotationed/ RP没问题的话,可以看到运行成功页面写着一个大大的Hello World!。祝lucky。

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