public static <T extends Annotation> T getAnnotationAlias(AnnotatedElement annotationEle, Class<T> annotationType) {
		final T annotation = getAnnotation(annotationEle, annotationType);
		if (null == annotation) {
			return null;
		}
		return aggregatingFromAnnotation(annotation).synthesize(annotationType);
	}
@Test
	public void getAnnotationSyncAliasWhenNotAnnotation() {
		getAnnotationSyncAlias();
		// 使用AnnotationUtil.getAnnotationAlias获取对象上并不存在的注解
		final Alias alias = AnnotationUtil.getAnnotationAlias(ClassWithAnnotation.class, Alias.class);
		assertNull(alias);
	}