package study.spring.configure.auto;import org.springframework.stereotype.Component;/*** 第一步：将该类声明成一个组件类,括号内的参数为组件类的id自定义名称，也可以使用@Named.* spring会自动生成该类的bean* @author wang**/
@Component("lonelyHeartsClub")
public class SgtPeppers implements CompactDisc{private String titil = "Sgt. Pepper's Lonely Hearts Club Band.";private String artist = "The Beatles";@Overridepublic void play() {System.out.println("Playing " + titil + " by " + artist);}}

package study.spring.configure.auto;import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;/**    使用@ComponentScan注解开启组件扫描,设置扫描的基础包名*        参数basePackages*        或者basePackageClasses*/@Configuration
@ComponentScan(basePackages={"study.spring.configure.auto","study.spring.configure.auto2"})
public class CDPlayerConfig {}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsd"> <context:component-scan base-package="study.spring.configure.auto"></context:component-scan></beans>

package study.spring.configure.auto;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;@Component
public class CDPleayer {@Autowiredprivate CompactDisc cd;public CompactDisc getCd() {return cd;}/** 不同的注入方法* 1. set方法注入* 2. 构造器注入* 3. 属性上直接注入 * * @Autowired与@Inject类似*/@Autowiredpublic void setCd(CompactDisc cd) {this.cd = cd;}@Autowired(required=false)public CDPleayer(CompactDisc compactDisc) {this.cd = compactDisc;}public void play(){cd.play();}
}