JSP Spring 自动化装配Bean实例详解_JSP编程_

 public interface CompactDisc { public abstract void play(); }

 @Component("SgtPeppers") public class SgtPeppers implements CompactDisc { private String title = "Sgt.Pepper's Lonely Hearts Club Band"; private String artist = "The Beatles"; @Override public void play() { System.out.println("playing" + title + " by " + artist); } }

 @Component("CDplayer")//表明该类作为组件类，没必要显示的配置Bean实例,括号内为组件名 public class CDPlayer { /* * @Autowired注解可以用在构造器上，也可以用在set方法上，也能直接放在下列代码所示地方 * spring会满足有该注解的依赖，如果只有一个bean匹配依赖需求的话，这个bean就会被装配进来 @Autowired 默认按类型装配 * */ @Autowired private CompactDisc cd; public CompactDisc getCd() { return cd; } public void setCd(CompactDisc cd) { this.cd = cd; } public void play(){ cd.play(); } } 

 public class CDPlayerTest { public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml"); CDPlayer cdPlayer= (CDPlayer) context.getBean("CDplayer"); cdPlayer.play(); } }