一, 第一个待注入类
public class CacheService {
}
public class LoggerService {
}
方法一, 实现接口ImportSelectort
public class CacheImportSelector implements ImportSelector {
@Override
public String[] selectImports(AnnotationMetadata annotationMetadata) {
return new String[]{CacheService.class.getName()};
}
}
方法二, 实现接口ImportBeanDefinitionRegistrar,
public class LoggerServiceSelector implements ImportBeanDefinitionRegistrar {
@Override
public void registerBeanDefinitions(AnnotationMetadata annotationMetadata, BeanDefinitionRegistry beanDefinitionRegistry) {
RootBeanDefinition rootBeanDefinition = new RootBeanDefinition(LoggerService.class);
String strBeanname = StringUtils.uncapitalize(LoggerService.class.getName());
beanDefinitionRegistry.registerBeanDefinition(strBeanname, rootBeanDefinition);
}
}
自定义Enable注解, 将CacheService, LoggerService加载到Spring-boot项目中
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Component
@Import({CacheImportSelector.class, LoggerServiceSelector.class})
public @interface EnableCacheService {
}
//启动Spring-boot
@EnableCacheService
@SpringBootApplication
public class SpringBootDemoApplication {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(SpringBootDemoApplication.class, args);
CacheService cacheService = context.getBean(CacheService.class);
System.out.println(cacheService.toString());
LoggerService loggerService = context.getBean(LoggerService.class);
System.out.println(loggerService);
}
}
