SpringBoot中AOP的多种用途与实践指南

@Aspect
@Component
public class LoggingAspect {
    private static final Logger logger = LoggerFactory.getLogger(LoggingAspect.class);

    @Around("execution(* com.example.service.*.*(..))")
    public Object logExecutionTime(ProceedingJoinPoint joinPoint) throws Throwable {
        long startTime = System.currentTimeMillis();
        Object result = joinPoint.proceed(); // 执行目标方法
        long timeTaken = System.currentTimeMillis() - startTime;

        logger.info("Method: {} | Args: {} | Time: {}ms", 
                    joinPoint.getSignature().getName(), 
                    Arrays.toString(joinPoint.getArgs()), 
                    timeTaken);
        return result;
    }
}

@Aspect
@Component
public class PerformanceAspect {
    @Around("execution(* com.example.service.*.*(..))")
    public Object measureTime(ProceedingJoinPoint joinPoint) throws Throwable {
        long startTime = System.currentTimeMillis();
        Object result = joinPoint.proceed();
        long executionTime = System.currentTimeMillis() - startTime;

        logger.info("Method: {} executed in {}ms", 
                    joinPoint.getSignature().getName(), 
                    executionTime);
        return result;
    }
}

@Aspect
@Component
public class ExceptionAspect {
    @AfterThrowing(pointcut = "execution(* com.example.service.*.*(..))", throwing = "ex")
    public void handleException(Exception ex) {
        logger.error("Exception caught: {}", ex.getMessage());
    }
}

@Aspect
@Component
public class SecurityAspect {
    @Before("execution(* com.example.controller.*.*(..))")
    public void checkPermission() {
        if (!SecurityContextHolder.getContext().getAuthentication().hasRole("ADMIN")) {
            throw new AccessDeniedException("Access Denied");
        }
    }
}

@Aspect
@Component
public class TransactionAspect {
    @Around("@annotation(org.springframework.transaction.annotation.Transactional)")
    public Object manageTransaction(ProceedingJoinPoint joinPoint) throws Throwable {
        try {
            Object result = joinPoint.proceed();
            return result;
        } catch (Exception e) {
            // Rollback logic
            throw e;
        }
    }
}