Spring context:component-scan代替context:annotation-config

Spring context:component-scan代替context:annotation-config

XML:

<?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" />

</beans>

AppBean:

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);

    }

}

POJO:

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;

    @Override

    public 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 {

}