在一次使用BeanPostProcessor初始化数据时，发现BeanPostProcessor总不能获取到Controller上的自定义注解。原生代码如下：
/**
* @author Administrator
*/
@Component
@RequiredArgsConstructor
public class ResourceLoadBeanPostProcessor implements BeanPostProcessor {
private final ResourceRepository resourceRepository;
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
Class<?> clazz = bean.getClass();
// 总是不能获取到注解数据
if (clazz.isAnnotationPresent(Resource.class)) {
return bean;
}
}
}
解决方法：使用Spring自带的工具类Annotationutils
@Component
@RequiredArgsConstructor
public class ResourceLoadBeanPostProcessor implements BeanPostProcessor {
private final ResourceRepository resourceRepository;
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
Class<?> clazz = bean.getClass();
// 解决办法：使用Spring提供的工具类AnnotationUtils.findAnnotation(Class<?>, Class<?>)
Resource parent = AnnotationUtils.findAnnotation(clazz, Resource.class);
if (parent == null) {
return bean;
}
}
}
