<context:component-scan>

@SpringBootApplication
public class ZzyNotesApplication {
    public static void main(String[] args) {
        ConfigurableApplicationContext context = SpringApplication.run(ZzyNotesApplication.class, args);
        String[] beanDefinitionNames = context.getBeanDefinitionNames();
        for (String beanName : beanDefinitionNames) {
            System.out.println("beanName: " + beanName);
        }
        System.out.println("bean總數(shù):"+context.getBeanDefinitionCount());
    }
}

@SpringBootApplication注解中已經(jīng)存在,也可以根據(jù)需要自定義		
@SpringBootApplication(scanBasePackages = "")

@Configuration
@ComponentScans(
        {
        @ComponentScan(value = "com.zzy.zzyNotes" ,useDefaultFilters = false),
        @ComponentScan(value = "com.zzy.zzyNotes.spring.createBean",
                excludeFilters = {
                        @ComponentScan.Filter(type = FilterType.ANNOTATION, value = {Service.class}),//排除包含注解Service的類(不生效,原因未知)
                        @ComponentScan.Filter(type = FilterType.ANNOTATION, value = {ExcludeMyAnnotation.class})//排除包含注解MyAnnotation2的類
                },
                includeFilters = {
                        @ComponentScan.Filter(type = FilterType.ANNOTATION, classes = {IncludeMyAnnotation.class}),//指定掃描包換注解MyAnnotation的類
                        @ComponentScan.Filter(type = FilterType.ANNOTATION, classes = {Controller.class}),//指定注解掃描包換注解Controller的類
                        @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE , classes = {Person2.class}),//指定類型Person2的類
                        @ComponentScan.Filter(type = FilterType.CUSTOM, classes = {MyTypeFilter.class})//自定義過濾規(guī)則
                }
                , useDefaultFilters = false//這個沒有效果,必須在啟動類上的@ComponentScan( useDefaultFilters = false)中配置 false
        )
        }
)
public class BeanConfig {
}

/**
 * @author zzy
 * @createDate: 2021-12-30 16:26:50
 * @description: 自定義注解 指定某個類被掃描
 */
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface IncludeMyAnnotation {
}

/**
 * @author zzy
 * @createDate: 2021-12-30 16:26:50
 * @description: 自定義注解 排除某個類被掃描
 */
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface ExcludeMyAnnotation {
}

/**
 * 掃描包自定義規(guī)則
 * metadataReader:讀取到當前正在掃描類的信息
 * metadataReaderFactory：可以獲取到其他任何類的信息
 *	注意:只有不滿足其它的規(guī)則,才會被自定義過濾規(guī)則判斷
 * @author zzy
 */
public class MyTypeFilter implements TypeFilter {

    /**
    * @description:  掃描規(guī)則
    * @params:
    * @return: 返回true 加入IOC容器 false ,排除
    */
    @Override
    public boolean match(MetadataReader metadataReader, MetadataReaderFactory metadataReaderFactory)
        throws IOException {
        //獲取當前類注解信息
        AnnotationMetadata annotationMetadata = metadataReader.getAnnotationMetadata();
        //獲取當前正在掃描類的信息
        ClassMetadata classMetadata = metadataReader.getClassMetadata();
        //獲取當前類資源信息 （比如類存在哪個盤，類的路徑  ）
        Resource resource = metadataReader.getResource();
        String name = classMetadata.getClassName();
        System.out.println("Filter掃描的類名:" + name);
        if(name.contains("Person3")){
            return true;
        }
        return false;
    }
}

/**
 * @author zzy
 * @createDate: 2021-12-30 10:08:35
 * @description: 創(chuàng)建Bean Person1 加IncludeMyAnnotation
 */
@IncludeMyAnnotation
public class Person1 {
}

/**
 * @author zzy
 * @createDate: 2021-12-30 10:10:37
 * @description: 創(chuàng)建Bean Person1 加@ExcludeMyAnnotation 被排除
 * 正常有@Component就會被掃描,加了@ExcludeMyAnnotation就會被排除
 */
@ExcludeMyAnnotation
@Component
public class Person2 {
}

/**
 * @author zzy
 * @createDate: 2021-12-30 17:03:44
 * @description: 創(chuàng)建Bean Person3  符合MyTypeFilter過濾規(guī)則
 */
public class Person3 {
}