spring学习24-:在javaconfig中配置bean对象

package com.geyao.demo.config;
     import com.geyao.demo.dao.UserDao;
     import com.geyao.demo.dao.impl.UserDaoNormal;
     import org.springframework.context.annotation.Bean;
     import org.springframework.context.annotation.ComponentScan;
     import org.springframework.context.annotation.Configuration;
     @Configuration
     public class Appconfig {
         @Bean
         public UserDao userDaoNormal(){
             System.out.println("创建UserDao对象"
             );
             return  new UserDaoNormal();
         }
     }UserNormal类
    package com.geyao.demo.dao.impl;
     import com.geyao.demo.dao.UserDao;
     import org.springframework.stereotype.Repository;
     public class UserDaoNormal implements UserDao {
         public void add(){
             System.out.println("添加到数据库中...");
         }
     }UserDao类
    package com.geyao.demo.dao;
     public interface UserDao {
         void add();
     }UserDaoTest类
    package com.geyao.demo.dao;
     import com.geyao.demo.config.Appconfig;
     import org.junit.Test;
     import org.junit.runner.RunWith;
     import org.springframework.beans.factory.annotation.Autowired;
     import org.springframework.test.context.ContextConfiguration;
     import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
     @RunWith(SpringJUnit4ClassRunner.class)
     @ContextConfiguration(classes = Appconfig.class)
     public class UserDaoTest {
         @Autowired
         private UserDao userDao;
         @Test
         public void testAdd(){
             userDao.add();
         }
     }运行结果
    [INFO ] 2019-10-31 20:52:25,614 method:org.springframework.test.context.support.AbstractTestContextBootstrapper.getDefaultTestExecutionListenerClassNames(AbstractTestContextBootstrapper.java:260)
     Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener]
     [INFO ] 2019-10-31 20:52:25,625 method:org.springframework.test.context.support.AbstractTestContextBootstrapper.instantiateListeners(AbstractTestContextBootstrapper.java:209)
     Could not instantiate TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener]. Specify custom listener classes or make the default listener classes (and their required dependencies) available. Offending class: [org/springframework/transaction/interceptor/TransactionAttributeSource]
     [INFO ] 2019-10-31 20:52:25,629 method:org.springframework.test.context.support.AbstractTestContextBootstrapper.instantiateListeners(AbstractTestContextBootstrapper.java:209)
     Could not instantiate TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener]. Specify custom listener classes or make the default listener classes (and their required dependencies) available. Offending class: [org/springframework/transaction/interceptor/TransactionAttribute]
     [INFO ] 2019-10-31 20:52:25,631 method:org.springframework.test.context.support.AbstractTestContextBootstrapper.instantiateListeners(AbstractTestContextBootstrapper.java:209)
     Could not instantiate TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener]. Specify custom listener classes or make the default listener classes (and their required dependencies) available. Offending class: [javax/servlet/ServletContext]
     [INFO ] 2019-10-31 20:52:25,632 method:org.springframework.test.context.support.AbstractTestContextBootstrapper.getTestExecutionListeners(AbstractTestContextBootstrapper.java:187)
     Using TestExecutionListeners: [org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@67b467e9, org.springframework.test.context.support.DependencyInjectionTestExecutionListener@47db50c5, org.springframework.test.context.support.DirtiesContextTestExecutionListener@5c072e3f]添加到数据库中...
     [INFO ] 2019-10-31 20:52:25,819 method:org.springframework.context.support.AbstractApplicationContext.prepareRefresh(AbstractApplicationContext.java:583)
     Refreshing org.springframework.context.support.GenericApplicationContext@6c3f5566: startup date [Thu Oct 31 20:52:25 CST 2019]; root of context hierarchy
     [DEBUG] 2019-10-31 20:52:25,846 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
     Creating shared instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:25,847 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:25,905 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] 2019-10-31 20:52:25,910 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
     Finished creating instance of bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
     WARNING: An illegal reflective access operation has occurred
     WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (file:/C:/Users/geyao/.m2/repository/org/springframework/spring-core/4.3.13.RELEASE/spring-core-4.3.13.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
     WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1
     WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
     WARNING: All illegal access operations will be denied in a future release
     [DEBUG] 2019-10-31 20:52:26,093 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
     Creating shared instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:26,094 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:26,095 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] 2019-10-31 20:52:26,122 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
     Finished creating instance of bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:26,122 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
     Creating shared instance of singleton bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:26,124 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:26,128 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] 2019-10-31 20:52:26,134 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
     Finished creating instance of bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:26,142 method:org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:730)
     Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@5fdcaa40: 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,userDaoNormal]; root of factory hierarchy
     [DEBUG] 2019-10-31 20:52:26,142 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:26,142 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:26,143 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
     [DEBUG] 2019-10-31 20:52:26,143 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
     Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerProcessor'
     [DEBUG] 2019-10-31 20:52:26,143 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'org.springframework.context.event.internalEventListenerProcessor'
     [DEBUG] 2019-10-31 20:52:26,149 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] 2019-10-31 20:52:26,152 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
     Finished creating instance of bean 'org.springframework.context.event.internalEventListenerProcessor'
     [DEBUG] 2019-10-31 20:52:26,153 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
     Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory'
     [DEBUG] 2019-10-31 20:52:26,153 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'org.springframework.context.event.internalEventListenerFactory'
     [DEBUG] 2019-10-31 20:52:26,154 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] 2019-10-31 20:52:26,171 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
     Finished creating instance of bean 'org.springframework.context.event.internalEventListenerFactory'
     [DEBUG] 2019-10-31 20:52:26,171 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
     Creating shared instance of singleton bean 'appconfig'
     [DEBUG] 2019-10-31 20:52:26,172 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'appconfig'
     [DEBUG] 2019-10-31 20:52:26,173 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
     Eagerly caching bean 'appconfig' to allow for resolving potential circular references
     [DEBUG] 2019-10-31 20:52:26,177 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
     Finished creating instance of bean 'appconfig'
     [DEBUG] 2019-10-31 20:52:26,177 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
     Creating shared instance of singleton bean 'userDaoNormal'
     [DEBUG] 2019-10-31 20:52:26,177 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
     Creating instance of bean 'userDaoNormal'
     [DEBUG] 2019-10-31 20:52:26,180 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'appconfig'
     创建UserDao对象
     [DEBUG] 2019-10-31 20:52:26,219 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
     Eagerly caching bean 'userDaoNormal' to allow for resolving potential circular references
     [DEBUG] 2019-10-31 20:52:26,222 method:org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:485)
     Finished creating instance of bean 'userDaoNormal'
     [DEBUG] 2019-10-31 20:52:26,222 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory'
     [DEBUG] 2019-10-31 20:52:26,285 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'lifecycleProcessor'
     [DEBUG] 2019-10-31 20:52:26,294 method:org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:86)
     Processing injected element of bean 'com.geyao.demo.dao.UserDaoTest': AutowiredFieldElement for private com.geyao.demo.dao.UserDao com.geyao.demo.dao.UserDaoTest.userDao
     [DEBUG] 2019-10-31 20:52:26,297 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'userDaoNormal'
     [DEBUG] 2019-10-31 20:52:26,298 method:org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.registerDependentBeans(AutowiredAnnotationBeanPostProcessor.java:535)
     Autowiring by type from bean name 'com.geyao.demo.dao.UserDaoTest' to bean named 'userDaoNormal'
     [INFO ] 2019-10-31 20:52:26,308 method:org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:984)
     Closing org.springframework.context.support.GenericApplicationContext@6c3f5566: startup date [Thu Oct 31 20:52:25 CST 2019]; root of context hierarchy
     [DEBUG] 2019-10-31 20:52:26,309 method:org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:251)
     Returning cached instance of singleton bean 'lifecycleProcessor'
     [DEBUG] 2019-10-31 20:52:26,310 method:org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:512)