aop切面编程示例代码

aop切面编程的示例代码如下：

public class LoggingAspect {
    
    @Before("execution(* com.example.service.UserService.*(..))")
    public void beforeAdvice(JoinPoint joinPoint) {
        System.out.println("Before method: " + joinPoint.getSignature().getName());
    }
    
    @After("execution(* com.example.service.UserService.*(..))")
    public void afterAdvice(JoinPoint joinPoint) {
        System.out.println("After method: " + joinPoint.getSignature().getName());
    }
    
    @Around("execution(* com.example.service.UserService.*(..))")
    public void aroundAdvice(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        System.out.println("Before method: " + proceedingJoinPoint.getSignature().getName());
        proceedingJoinPoint.proceed();
        System.out.println("After method: " + proceedingJoinPoint.getSignature().getName());
    }
}

这段代码是一个简单的日志切面示例，通过使用AOP技术，我们可以在UserService类的所有方法执行前后打印相应的日志信息。