[v现象]cglib动态代理导致注解丢失问题及如何修改注解允许被继承

public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {

Service anon = bean.getClass().getAnnotation(Service.class);

if (anon != null) {

try {

InvocationHandler h = Proxy.getInvocationHandler(anon);

//增设@Service注释全力支持承继，应付静态全权引致类上的@Service注释遗失

Field typeField = h.getClass().getDeclaredField("type");

typeField.setAccessible(true);

Field annotationTypeField = Class.class.getDeclaredField("annotationType");

annotationTypeField.setAccessible(true);

AnnotationType annotationType = (AnnotationType) annotationTypeField.get(typeField.get(h));

Field inheritedField = AnnotationType.class.getDeclaredField("inherited");

this.updateFinalModifiers(inheritedField);

inheritedField.set(annotationType, true);

// 获取 AnnotationInvocationHandler 的 memberValues 字段

Field memberValuesField = h.getClass().getDeclaredField("memberValues");

// 因为这个字段事 private final 修饰，所以要打开权限

memberValuesField.setAccessible(true);

// 获取 memberValues

Map memberValues = (Map) memberValuesField.get(h);

Service service = Stream.of(bean.getClass().getInterfaces())

.filter(iface -> iface.getAnnotation(Service.class) != null)

.collect(Collectors.toList())

.get(0)

.getAnnotation(Service.class);

memberValues.put("version", service.version());

memberValues.put("group", service.group());

} catch (Exception e) {

throw new BeanCreationException(String.format("%s %s %s %s %s"

, "修正"

, ClassUtils.getQualifiedName(bean.getClass())

, "的注释"

, ClassUtils.getQualifiedName(Service.class)

, "的 group值和version值出错")

, e);

}

}

return bean;

}