一、Springboot:请求入口@SpringBootApplication
@EnableAspectJAutoProxy
@EnableScheduling
@EnableTransactionManagement
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}
}

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan(excludeFilters = {@Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),@Filter(type = FilterType.CUSTOM, classes = AutoConfigurationExcludeFilter.class) })
public @interface SpringBootApplication {……
}

<beans><bean id="course" class="demo.Course"><property name="module" ref="module"/></bean><bean id="module" class="demo.Module"><property name="assignment" ref="assignment"/></bean><bean id="assignment" class="demo.Assignment" />
</beans>

@Configuration
public class AppContext {@Beanpublic Course course() {Course course = new Course();course.setModule(module());return course;}@Beanpublic Module module() {Module module = new Module();module.setAssignment(assignment());return module;}@Beanpublic Assignment assignment() {return new Assignment();}
}

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Import {/*** {@link Configuration}, {@link ImportSelector}, {@link ImportBeanDefinitionRegistrar}* or regular component classes to import.*/Class<?>[] value();}

public interface Car {public void print();
}
@Component
public class Toyota implements Car {@Overridepublic void print() {// TODO Auto-generated method stubSystem.out.println("I am Toyota");}}@Component
public class Volkswagen implements Car {@Overridepublic void print() {// TODO Auto-generated method stubSystem.out.println("I am Volkswagen");}}@Configuration
public class JavaConfigA {@Bean(name="volkswagen")public Car getVolkswagen(){return new Volkswagen();}
}@Configuration
public class JavaConfigB {@Bean(name="toyota")public Car getToyota(){return new Toyota();}
}@Configuration
@Import({JavaConfigA.class,JavaConfigB.class})
public class ParentConfig {//Any other bean definitions
}
public class ContextLoader {public static void main (String args[]){AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ParentConfig.class);Car car = (Toyota)context.getBean("toyota");car.print();car = (Volkswagen)context.getBean("volkswagen");car.print();context.close();}
}