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.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>

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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);} }

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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") // 這里可以指定Bean的ID public class Singer2 {@Autowired// @Component標注的類，其Id是camel-casing類名；兩個Intrument接口實現類，必須指定其中的一個；@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 { }

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總結

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