Spring|Spring 3 hello world example Spring3helloworldexample

This tutorial shows you how to create a simple hello world example in Spring 3.0.
Technologies used in this article :

Spring 3.0.5.RELEASE
Maven 3.0.3
Eclipse 3.6
JDK 1.6.0.13

P.S
Spring 3.0, at least JDK 1.5 is required to work.

Spring 3.0 dependencies
In Spring 2.5.x, almost the entire Spring modules are grouped into a single spring.jar file. Since Spring 3.0, every modules are split into an individual jar file, for example, spring-core, spring-expression, spring-context, spring-aop and etc.

1. Generate project structure with Maven Issue below Maven command to create a standard Java project structure.

mvn archetype:generate -DgroupId=com.mkyong.core -DartifactId=Spring3Example -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

2. Convert to Eclipse project Convert Maven style project to Eclipse’s style project, and import into Eclipse IDE.`

mvn eclipse:eclipse

2. Add Spring 3.0 dependency Add the Spring 3.0 dependencies listed below in Maven’s pom.xml file. The Spring dependencies are available for download via Maven central repository.
File : pom.xml

4.0.0 com.mkyong.core Spring3Examplejar 1.0-SNAPSHOT Spring3Example http://maven.apache.org3.0.5.RELEASE org.springframework spring-core ${spring.version} org.springframework spring-context ${spring.version}

3. Spring bean A simple Spring bean.

package com.mkyong.core; /** * Spring bean * */ public class HelloWorld { private String name; public void setName(String name) { this.name = name; } public void printHello() { System.out.println("Spring 3 : Hello ! " + name); } }

4. Spring bean configuration file Create a Spring configuration file, and declare all the available Spring beans.
File : SpringBeans.xml

5. Review project structure Review directory structure as follows

文章图片
Spring3-hello-world-example.png 6. Run It 【Spring|Spring 3 hello world example】Run it.

package com.mkyong.core; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class App { public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext( "SpringBeans.xml"); HelloWorld obj = (HelloWorld) context.getBean("helloBean"); obj.printHello(); } }

7. Output