60 seconds to Spring （1）-优快云博客

该博客介绍了使用Spring IoC调用Hello World Bean的教程。包括创建HelloBean.java、在bean.xml中指定HelloBean类、创建Main.java，最后使用ANT脚本构建并执行Main类，按步骤操作即可完成。

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原文地址：http://gabriel.jarchitect.org/spring/index.html

60 sec to Spring [TOC]

Bean Tutorial 1 - Hello World Bean

This tutorial show you how to call a Hello World Bean using Spring IoC.

Step 1: Create a HelloBean.java in src

org/jarchitect/spring/tutorial1/HelloBean.java

package org.jarchitect.spring.tutorial1; public class HelloBean { public String sayHelloWorld() { return "Hello World"; } }

Step 2: Specify the HelloBean class in the bean.xml

bean.xml


       version="1.0" encoding="UTF-8"?>  beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> 
        
        
         
        jarchitect 
        Spring 
        Tutorial 
        1
         
        
         
          < font> 
          id=
          "helloBean" 
          class=
          "org.jarchitect.spring.tutorial1.HelloBean"
          />

Step 3: Create a Main.java in src

org/jarchitect/spring/tutorial1/Main.java

package org.jarchitect.spring.tutorial1; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.InputStream; import org.springframework.beans.factory.xml.XmlBeanFactory; public class Main { public static void main(String[] args) { try { //Read the configuration file InputStream is = new FileInputStream("bean.xml"); XmlBeanFactory factory = new XmlBeanFactory(is); //Instantiate an object HelloBean helloBean = (HelloBean) factory.getBean("helloBean"); //Execute the public method of the HelloBean System.out.println(helloBean.sayHelloWorld()); } catch (FileNotFoundException e) { e.printStackTrace(); } } }

Step 4: Use an ANT script to build and execute the Main class. Just run ant from the command prompt will do the trick.

Below are the output from ANT.

C:/60sec2Spring/SpringTutorial1>ant Buildfile: build.xml build: [javac] Compiling 2 source files to C:/60sec2Spring/SpringTutorial1/bin run: [java] May 18, 2004 2:25:14 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions [java] INFO: Loading XML bean definitions from (no description) [java] May 18, 2004 2:25:15 PM org.springframework.beans.factory.support.AbstractBeanFactory getBean [java] INFO: Creating shared instance of singleton bean 'helloBean'  [java] Hello World