Spring AOP：@annotation() 切入点与类型注释不匹配

Question

我正在编写一个方面来记录控制器中每个 API 调用的请求和响应。我希望能够在 class 上使用此注释，因此使用了 @Target(ElementType.TYPE)

之前我添加了 @Target(ElementType.Method) 并且我在方法上使用了这个注释并且它工作正常。现在我想把它改成@Target(ElementType.TYPE)

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface ReLogger {}

@Aspect
@Component
public class ReLoggerAspect {
    public static final Logger log = LoggerFactory.getLogger("ReLoggerAspect");

    @PostConstruct
    private void postConstruct() {
        log.info("ReLoggerAspect Created");
    }

    @Around("@annotation(ReLogger)")
    private Object reqLoggingAspect(ProceedingJoinPoint joinPoint) throws Throwable {
        log.info("Request {}",jointPoint.getArgs()[0);
    }
}

在 class

上使用 @ReLoggerAspect

@RestController
@RequestMapping(value = "....", produces = { "application/json" })
@ReLogger
public class Samplecontroller {
    /** Some logic here**/.....
}

调用 API SampleController 时不打印请求

Answer 1

您认为 @annotation 会匹配类型注释的前提是错误的，请参阅 (Spring AOP 手册](https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#aop-pointcuts-designators):

@within: Limits matching to join points within types that have the given annotation (the execution of methods declared in types with the given annotation when using Spring AOP).

@annotation: Limits matching to join points where the subject of the join point (the method being executed in Spring AOP) has the given annotation.

因此，您应该使用 @within(fully.qualified.AnnotationType)。

Spring AOP：@annotation() 切入点与类型注释不匹配

Spring AOP: @annotation() pointcut does not match type annotation

java

annotations

aspectj

spring-aop

pointcut