spring学习10-创建项目(自动装配)

spring学习10-创建项目(自动装配)

首先创建项目

pom.xml的配置文件
    <?xml version="1.0" encoding="UTF-8"?>
     <project xmlns="http://maven.apache.org/POM/4.0.0"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
         <modelVersion>4.0.0</modelVersion>
         <groupId>com.geyao</groupId>
         <artifactId>spring01geyao</artifactId>
         <version>1.0-SNAPSHOT</version>
         <dependencies>
             <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
             <version>4.3.13.RELEASE</version>
         </dependency>
             <dependency>
                 <groupId>log4j</groupId>
                 <artifactId>log4j</artifactId>
                 <version>1.2.17</version>
             </dependency>
         </dependencies>
     </project>配置log4j的配置文件
    ### 设置###
     log4j.rootLogger = INFO,stdout
     ### 输出信息到控制抬 ###
     log4j.appender.stdout = org.apache.log4j.ConsoleAppender
     log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
     log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
     log4j.category.org.springframework.beans.factory=DEBUGCompactDisc类
    package soundSystem;
     import org.springframework.stereotype.Component;
64;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");
         }
     @Autowired
         public 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;
     @ComponentScan
     public class App {
         public static void main(String[] args){
             ApplicationContext context=new AnnotationConfigApplicationContext(App.class);
             CDPlayer player=context.getBean(CDPlayer.class);
             player.play();
         }
     }运行结果
    [INFO ] 2019-10-29 18:56:54,850 method:org.springframework.context.support.AbstractApplicationContext.prepareRefresh(AbstractApplicationContext.java:583)
     Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@880ec60: startup date [Tue Oct 29 18:56:54 CST 2019]; root of context hierarchy
     [DEBUG] 2019-10-29 18:56:54,874 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 18:56:54,875 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
     [DEBUG] 2019-10-29 18:56:54,900 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 18:56:54,904 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 18:56:54,995 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 18:56:54,996 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
     [DEBUG] 2019-10-29 18:56:54,997 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 18:56:55,030 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 18:56:55,030 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 18:56:55,031 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
     [DEBUG] 2019-10-29 18:56:55,032 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 18:56:55,040 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 18:56:55,046 method:org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:730)
     Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@166fa74d: 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,app,CDPlayer,compactDisc]; root of factory hierarchy
     [DEBUG] 2019-10-29 18:56:55,047 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 18:56:55,047 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 18:56:55,050 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 18:56:55,050 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 18:56:55,051 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'org.springframework.context.event.internalEventListenerProcessor'
     [DEBUG] 2019-10-29 18:56:55,059 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 18:56:55,063 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 18:56:55,064 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 18:56:55,064 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'org.springframework.context.event.internalEventListenerFactory'
     [DEBUG] 2019-10-29 18:56:55,065 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 18:56:55,070 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 18:56:55,072 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
     Creating shared instance of singleton bean 'app'
     [DEBUG] 2019-10-29 18:56:55,072 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'app'
     [DEBUG] 2019-10-29 18:56:55,073 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
     Eagerly caching bean 'app' to allow for resolving potential circular references
     [DEBUG] 2019-10-29 18:56:55,076 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
     Finished creating instance of bean 'app'
     [DEBUG] 2019-10-29 18:56:55,076 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
     Creating shared instance of singleton bean 'CDPlayer'
     [DEBUG] 2019-10-29 18:56:55,077 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'CDPlayer'
     [DEBUG] 2019-10-29 18:56:55,120 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
     Creating shared instance of singleton bean 'compactDisc'
     [DEBUG] 2019-10-29 18:56:55,121 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 18:56:55,123 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 18:56:55,126 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
     Finished creating instance of bean 'compactDisc'
     [DEBUG] 2019-10-29 18:56:55,127 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 18:56:55,129 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 18:56:55,131 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
     Finished creating instance of bean 'CDPlayer'
     [DEBUG] 2019-10-29 18:56:55,131 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'compactDisc'
     [DEBUG] 2019-10-29 18:56:55,132 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 18:56:55,194 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'lifecycleProcessor'
     [DEBUG] 2019-10-29 18:56:55,199 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'CDPlayer'
     正在播放音乐....