Spring3系列1-HelloWord例子

一、 环境

spring-framework-3.2.4.RELEASE

jdk1.7.0_11

Maven3.0.5

eclipse-jee-juno-SR2-win32

二、 用Maven创建项目

mvn archetype:generate -DgroupId= com.lei.demo -DartifactId=Spring3-Example

-DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

然后转换成Eclipse项目：mvn eclipse:eclipse

或者直接在Eclipse中创建maven-archetype-quickstart项目。

三、 编辑pom.xml，加入spring3依赖

<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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>

<groupId>com.lei.demo</groupId>
<artifactId>spring3-Example</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>spring3-Example</name>
<url>http://maven.apache.org</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- Spring3配置 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
</dependencies>
</project>

四、 创建一个Spring Bean

一个简单的spring bean如下

package com.lei.demo.helloworld;

public class HelloWorld {

private String name;

public void setName(String name) {
this.name = name;
}

public void printHello() {
System.out.println("第一个Spring 3 : Hello ! " + name);
}
}

五、 创建Spring Bean的配置文件

创建文件SpringBeans.xml，配置bean如下。文件位于src/main/resources下

<beans xmlns="http://www.springframework.org/schema/beans"
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"> 
<bean id="helloBean" class="com.lei.demo.helloworld.HelloWorld">
<property name="name" value="leiOOlei" />
</bean>

</beans>

六、 创建测试App

package com.lei.demo.helloworld;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {

private static ApplicationContext context;

public static void main( String[] args )
{
context = new ClassPathXmlApplicationContext("SpringBeans.xml");

HelloWorld obj = (HelloWorld) context.getBean("helloBean");
obj.printHello();
}

}

七、 目录结构

八、 运行结果