spring BeanFactory加载xml配置文件示例

项目目录结构如下：

HelloWorld.java

 package com.thief.demo;

 public class HelloWorld {

     public void sayHello() {
         System.out.println("hello world!");
     }

 }

helloworld-config.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd" >
 <beans>
     <bean id="helloworld" class="com.thief.demo.HelloWorld"/>
 </beans>

Test.java

 package com.thief.demo;

 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;

 public class Test {

     public static void main(String[] args) {

         DefaultListableBeanFactory beanRegistry = new DefaultListableBeanFactory();
         XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(beanRegistry);
         reader.loadBeanDefinitions("classpath:com/thief/demo/helloworld-config.xml");
         BeanFactory container = (BeanFactory)beanRegistry;

         HelloWorld helloworld = (HelloWorld)container.getBean("helloworld");
         helloworld.sayHello();

     }

 }