如何通过方面获取自定义注释的参数？

Question

在我的方面方法中，我需要获取name（自定义注释的参数）的值name=“Unit Test”

由用户调用的方法：

@Service
@RequiredArgsConstructor
@Slf4j
public class Task {

    @CronLogger(name = "unit test")
    public void testCronLogger(String param) {
        log.info("testCronLogger ...");
    }

}

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface CronLogger {
   public String name() default "";
}

@Aspect
@Component
@EnableAspectJAutoProxy
public class CronLoggerAspect {
    
    private static final Logger log = LoggerFactory.getLogger(CronLoggerAspect.class);
    
    @Around("@annotation(CronLogger)")
    public Object trace(ProceedingJoinPoint joinPoint) throws Throwable {
        Object[] tab = joinPoint.getArgs();
        for (Object object : tab) {
            log.debug("CronLogger: {}", object);
        }
       return joinPoint.proceed();
    }
}

CronLogger: test
testCronLogger ...

Answer 1

需要get方法和该方法的get注释。

@Around("@annotation(CronLogger)")
public Object trace(ProceedingJoinPoint joinPoint) throws Throwable {
    String name = MethodSignature.class.cast(joinPoint.getSignature()).getMethod().getAnnotation(CronLogger.class)
            .name();
    log.debug("CronLogger: {}", name);
    return joinPoint.proceed();
}