Spring context:component-scan中使用context:include-filter和context:exclude-filter

<?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.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd">
    <context:component-scan base-package="com.stono.sprtest">
        <context:include-filter type="assignable" expression="com.stono.sprtest.InstrumentI" />
        <context:exclude-filter type="annotation" expression="com.stono.sprtest.SkipIt"/>
    </context:component-scan>
</beans>

package com.stono.sprtest;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class AppBeans7 {
    @SuppressWarnings("resource")
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("appbeans7.xml");
        Singer2 singer2 = (Singer2) context.getBean("singer");
        System.out.println(singer2);
        // Object bean = context.getBean("cymbal"); // 已经把Cymbal排除了；
        // System.out.println(bean);
    }
}

package com.stono.sprtest;

public @interface SkipIt {
}

package com.stono.sprtest;

@SkipIt
public class Cymbal implements InstrumentI {
}

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")
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("justValue2")
    private String name;
    @Override
    public String toString() {
        return "Singer2 [instrument=" + instrument + ", name=" + name + "]";
    }
}