<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans"xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd"><context:component-scan base-package="com.stono.sprtest" />
</beans>

package com.stono.sprtest;import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class AppBeans6 {@SuppressWarnings("resource")public static void main(String[] args) {ApplicationContext context = new ClassPathXmlApplicationContext("appbeans6.xml");Singer2 singer2 = (Singer2) context.getBean("singer");System.out.println(singer2);}
}

package com.stono.sprtest;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;@Component("singer") // 这里可以指定Bean的ID
public class Singer2 {@Autowired// @Component标注的类，其Id是camel-casing类名；两个Intrument接口实现类，必须指定其中的一个；@Qualifier("saxophone")private InstrumentI instrument;@Value("justValue")private String name;@Overridepublic String toString() {return "Singer2 [instrument=" + instrument + ", name=" + name + "]";}
}

package com.stono.sprtest;import org.springframework.stereotype.Component;@Component
public class Saxophone implements InstrumentI {private Integer age;private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}
}

package com.stono.sprtest;import org.springframework.stereotype.Component;@Component
public class Cymbal implements InstrumentI {
}