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控制反转
应用本身不负责依赖对象的创建及维护，而由外部容器负责。
第一个实例：
1.导包
2.beans.xml
<?xml version="1.0" encoding="UTF-8"?>
<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-2.5.xsd">
<bean id="personService" class="cn.itcast.service.impl.PersonServiceBean"></bean>
</beans>
3单元测试
package cn.itcast.service.impl; import cn.itcast.service.PersonService; public class PersonServiceBean implements PersonService { public void save(){ System.out.println("我是save()方法"); } }
package cn.itcast.service; public interface PersonService { public void save(); }
package junit.test; import org.junit.BeforeClass; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import cn.itcast.service.PersonService; public class SpringTest { @BeforeClass public static void setUpBeforeClass() throws Exception { } @Test public void instanceSpring(){ ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml"); PersonService personService = (PersonService)ctx.getBean("personService"); personService.save(); } }
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原文地址：http://www.cnblogs.com/rixiang/p/4770300.html
