先导入包：
commons-logging-1.1.1.jar ： spring依赖的包；
spring-beans-4.0.0.RELEASE.jar；
spring-context-4.0.0.RELEASE.jar；
spring-core-4.0.0.RELEASE.jar；
spring-expression-4.0.0.RELEASE.jar；
1 package com.model; 2 3 public class HelloWorld { 4 5 private String username; 6 7 public void setUsername(String username) { 8 this.username = username; 9 } 10 11 public void hello(){ 12 System.out.println("hello:"+username); 13 } 14 15 }
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> 5 6 <bean id="hello" class="com.model.HelloWorld"> 7 <property name="username" value="spring4"></property> 8 </bean> 9 10 11 </beans>
1 package com.model; 2 3 import org.springframework.context.ApplicationContext; 4 import org.springframework.context.support.ClassPathXmlApplicationContext; 5 6 public class Main { 7 8 public static void main(String[] args) { 9 //获取spring的IOC容器 10 ApplicationContext ac = new ClassPathXmlApplicationContext("hello.xml"); 11 12 //从容器中获取bean；hello对于xml文件中bean的id 13 HelloWorld helloWorld = (HelloWorld) ac.getBean("hello"); 14 System.out.println(helloWorld); 15 //调用方法 16 helloWorld.hello(); 17 } 18 19 }
打印结果：
十二月 06, 2014 9:51:47 上午 org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1642bd6: startup date [Sat Dec 06 09:51:47 CST 2014]; root of context hierarchy
十二月 06, 2014 9:51:47 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [hello.xml]
com.model.HelloWorld@154ab89
hello:spring4
原文：http://www.cnblogs.com/yzdqxing/p/4147895.html
