CompactDisc类

package soundSystem;import org.springframework.stereotype.Component;@Component
public class CompactDisc {public CompactDisc() {super();System.out.println("compactdisc无参构造方法");}public void play(){System.out.println("正在播放音乐....");}
}

CDplay类

package soundSystem;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;@Component
public class CDPlayer {private CompactDisc cd;public CDPlayer() {super();System.out.println("CDPlayer无参构造方法");}
@Autowiredpublic CDPlayer(CompactDisc cd) {this.cd = cd;System.out.println("CDPlayer有参构造方法");}public void play(){cd.play();}
}

App类

package soundSystem;import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;public class App {public static void main(String[] args){ApplicationContext context=new AnnotationConfigApplicationContext(App.class);CDPlayer player=context.getBean(CDPlayer.class);player.play();}
}

appconfig类

package soundSystem;import org.springframework.context.annotation.ComponentScan;
//spring注解类
@ComponentScan
public class Appconfig {
}

运行结果

[INFO ] 2019-10-29 19:11:30,833 method:org.springframework.context.support.AbstractApplicationContext.prepareRefresh(AbstractApplicationContext.java:583)
Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@880ec60: startup date [Tue Oct 29 19:11:30 CST 2019]; root of context hierarchy
[DEBUG] 2019-10-29 19:11:30,857 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
Creating shared instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:30,857 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
Creating instance of bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:30,883 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
Eagerly caching bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor' to allow for resolving potential circular references
[DEBUG] 2019-10-29 19:11:30,887 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
Finished creating instance of bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:30,965 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
Creating shared instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:30,965 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
Creating instance of bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:30,966 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
Eagerly caching bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor' to allow for resolving potential circular references
[DEBUG] 2019-10-29 19:11:30,998 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
Finished creating instance of bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:30,998 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
Creating shared instance of singleton bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:30,998 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
Creating instance of bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:31,000 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
Eagerly caching bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor' to allow for resolving potential circular references
[DEBUG] 2019-10-29 19:11:31,004 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
Finished creating instance of bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:31,009 method:org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:730)
Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@40f08448: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.event.internalEventListenerProcessor,org.springframework.context.event.internalEventListenerFactory,appconfig,CDPlayer,compactDisc]; root of factory hierarchy
[DEBUG] 2019-10-29 19:11:31,009 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:31,010 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:31,012 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
[DEBUG] 2019-10-29 19:11:31,012 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerProcessor'
[DEBUG] 2019-10-29 19:11:31,012 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
Creating instance of bean 'org.springframework.context.event.internalEventListenerProcessor'
[DEBUG] 2019-10-29 19:11:31,019 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
Eagerly caching bean 'org.springframework.context.event.internalEventListenerProcessor' to allow for resolving potential circular references
[DEBUG] 2019-10-29 19:11:31,023 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
Finished creating instance of bean 'org.springframework.context.event.internalEventListenerProcessor'
[DEBUG] 2019-10-29 19:11:31,023 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory'
[DEBUG] 2019-10-29 19:11:31,023 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
Creating instance of bean 'org.springframework.context.event.internalEventListenerFactory'
[DEBUG] 2019-10-29 19:11:31,024 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
Eagerly caching bean 'org.springframework.context.event.internalEventListenerFactory' to allow for resolving potential circular references
[DEBUG] 2019-10-29 19:11:31,028 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
Finished creating instance of bean 'org.springframework.context.event.internalEventListenerFactory'
[DEBUG] 2019-10-29 19:11:31,029 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
Creating shared instance of singleton bean 'appconfig'
[DEBUG] 2019-10-29 19:11:31,029 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
Creating instance of bean 'appconfig'
[DEBUG] 2019-10-29 19:11:31,030 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
Eagerly caching bean 'appconfig' to allow for resolving potential circular references
[DEBUG] 2019-10-29 19:11:31,032 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
Finished creating instance of bean 'appconfig'
[DEBUG] 2019-10-29 19:11:31,033 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
Creating shared instance of singleton bean 'CDPlayer'
[DEBUG] 2019-10-29 19:11:31,033 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
Creating instance of bean 'CDPlayer'
[DEBUG] 2019-10-29 19:11:31,048 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
Creating shared instance of singleton bean 'compactDisc'
[DEBUG] 2019-10-29 19:11:31,049 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
Creating instance of bean 'compactDisc'
compactdisc无参构造方法
[DEBUG] 2019-10-29 19:11:31,050 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
Eagerly caching bean 'compactDisc' to allow for resolving potential circular references
[DEBUG] 2019-10-29 19:11:31,054 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
Finished creating instance of bean 'compactDisc'
[DEBUG] 2019-10-29 19:11:31,055 method:org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:757)
Autowiring by type from bean name 'CDPlayer' via constructor to bean named 'compactDisc'
CDPlayer有参构造方法
[DEBUG] 2019-10-29 19:11:31,057 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
Eagerly caching bean 'CDPlayer' to allow for resolving potential circular references
[DEBUG] 2019-10-29 19:11:31,058 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
Finished creating instance of bean 'CDPlayer'
[DEBUG] 2019-10-29 19:11:31,059 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean 'compactDisc'
[DEBUG] 2019-10-29 19:11:31,059 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory'
[DEBUG] 2019-10-29 19:11:31,120 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean 'lifecycleProcessor'
[DEBUG] 2019-10-29 19:11:31,127 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
Returning cached instance of singleton bean 'CDPlayer'
正在播放音乐....