记录一下 Spring 如何扫描注解的 Bean 与资源

1@SpringBootApplication
2@ComponentScan(basePackages = "cc.unmi")
3public class DemoApplication {
4    public static void main(String[] args) {
5        SpringApplication.run(DemoApplication.class, args);
6    }
7}

 1protected void registerDefaultFilters() {
 2    this.includeFilters.add(new AnnotationTypeFilter(Component.class));
 3    ClassLoader cl = ClassPathScanningCandidateComponentProvider.class.getClassLoader();
 4    try {
 5        this.includeFilters.add(new AnnotationTypeFilter(
 6                ((Class<? extends Annotation>) ClassUtils.forName("javax.annotation.ManagedBean", cl)), false));
 7        logger.debug("JSR-250 'javax.annotation.ManagedBean' found and supported for component scanning");
 8    }
 9    catch (ClassNotFoundException ex) {
10        // JSR-250 1.1 API (as included in Java EE 6) not available - simply skip.
11    }
12    try {
13        this.includeFilters.add(new AnnotationTypeFilter(
14                ((Class<? extends Annotation>) ClassUtils.forName("javax.inject.Named", cl)), false));
15        logger.debug("JSR-330 'javax.inject.Named' annotation found and supported for component scanning");
16    }
17    catch (ClassNotFoundException ex) {
18        // JSR-330 API not available - simply skip.
19    }
20}

 1@Named
 2public class UserService implements ApplicationContextAware {
 3
 4    @Override
 5    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
 6        try {
 7            Resource[] resources = applicationContext.getResources("classpath*:**/springframework/**/*.xml");
 8            Stream.of(resources).forEach(resource -> System.out::println);
 9        } catch (IOException e) {
10            e.printStackTrace();
11        }
12    }
13}

 1@Named
 2public class UserService implements ResourceLoaderAware {
 3
 4    @Override
 5    public void setResourceLoader(ResourceLoader resourceLoader) {
 6        ResourcePatternResolver resourcePatternResolver = ResourcePatternUtils.getResourcePatternResolver(resourceLoader);
 7        try {
 8            Resource[] resources = resourcePatternResolver.getResources("classpath*:**/springframework/**/*.xml");
 9            Stream.of(resources).forEach(System.out::println);
10        } catch (IOException e) {
11            e.printStackTrace();
12        }
13    }
14}