Spring之IOC底层原理

@ComponentScan(
    value="com.itheima",	           //设置基础扫描路径
    excludeFilters =                          //设置过滤规则，当前为排除过滤
	@ComponentScan.Filter(            //设置过滤器
	    type= FilterType.ANNOTATION,  //设置过滤方式为按照注解进行过滤
	    classes=Repository.class)     //设置具体的过滤项，过滤所有@Repository修饰的bean
    )

public class MyTypeFilter implements TypeFilter {
    public boolean match(MetadataReader mr, MetadataReaderFactory mrf) throws IOException {
        ClassMetadata cm = metadataReader.getClassMetadata();
        tring className = cm.getClassName();
        if(className.equals("com.NanMu.dao.impl.BookDaoImpl")){
            return false;
        }
        return false;
    }
}

public class MyImportSelector implements ImportSelector {
    public String[] selectImports(AnnotationMetadata icm) {
        return new String[]{"com.itheima.dao.impl.AccountDaoImpl"};
    }
}

@Configuration
@ComponentScan("com.itheima")
@Import(MyImportSelector.class)
public class SpringConfig {
}

public class MyImportBeanDefinitionRegistrar implements ImportBeanDefinitionRegistrar {
    public void registerBeanDefinitions(AnnotationMetadata icm, BeanDefinitionRegistry r) {
        ClassPathBeanDefinitionScanner scanner = new ClassPathBeanDefinitionScanner(r, false);
        TypeFilter tf = new TypeFilter() {
            public boolean match(MetadataReader mr, MetadataReaderFactory mrf) throws IOException {
                return true;
            }
        };
        scanner.addIncludeFilter(tf);//包含
        //scanner.addExcludeFilter(tf);
        scanner.scan("com.itheima");
    }
}

@Configuration
@ComponentScan("com.itheima")
//4.自定义注册器
//@Import(MyImportBeanDefinitionRegistrar.class)

public class SpringConfig {
}