SpringAOP中@within和@annotation的區別

@within和@annotation的區別：

 1.  @within 對象級別
 2.  @annotation 方法級別

例如:

@Slf4j
@Aspect
@RequiredArgsConstructor
public class SecurityInnerAspect implements Ordered {

	private final HttpServletRequest request;

	@SneakyThrows
	@Around("@within(inner) || @annotation(inner)")
	public Object around(ProceedingJoinPoint point, Inner inner) {
		// 實際注入的inner實體由表達式后一個注解決定，即是方法上的@Inner注解實體，若方法上無@Inner注解，則獲取類上的
		if (inner == null) {
			Class<?> clazz = point.getTarget().getClass();
			inner = AnnotationUtils.findAnnotation(clazz, Inner.class);
		}
		String header = request.getHeader(SecurityConstants.FROM);
		if (inner.value() && !StrUtil.equals(SecurityConstants.FROM_IN, header)) {
			log.warn("訪問接口 {} 沒有權限", point.getSignature().getName());
			throw new AccessDeniedException("Access is denied");
		}
		return point.proceed();
	}

	@Override
	public int getOrder() {
		return Ordered.HIGHEST_PRECEDENCE + 1;
	}

}

//這個用於攔截標注在類上面的@RestController注解
@Around("@within(org.springframework.web.bind.annotation.RestController") 
       
// 這個用於攔截標注在方法上面的@RestController注解
@Around("@annotation(org.springframework.web.bind.annotation.RestController")