package cn.annals.demo.proc.aop;import org.aspectj.lang.JoinPoint;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.After;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.AfterThrowing;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.stereotype.Component;//声明这是一个组件@Component//声明这是一个切面Bean@Aspectpublic class proc_service_aop {    private final Logger LOG = LoggerFactory.getLogger(this.getClass());        //配置切入点,该方法无方法体,主要为方便同类中其他方法使用此处配置的切入点    //@Pointcut("execution(public * cn.annals.demo.proc.service..*(..))")    @Pointcut("execution(public * cn.annals.demo.proc.service..*.save(..))")    public void aspect(){}        /*     * 配置前置通知,使用在方法aspect()上注册的切入点     * 同时接受JoinPoint切入点对象,可以没有该参数     */    @Before("aspect()")    public void before(JoinPoint joinPoint){        if(LOG.isInfoEnabled()){            LOG.info("before " + joinPoint);        }    }        //配置后置通知,使用在方法aspect()上注册的切入点    @After("aspect()")    public void after(JoinPoint joinPoint){        if(LOG.isInfoEnabled()){            LOG.info("after " + joinPoint);        }    }        //配置环绕通知,使用在方法aspect()上注册的切入点    @Around("aspect()")    public void around(ProceedingJoinPoint joinPoint){        long start = System.currentTimeMillis();        try {            joinPoint.proceed();            long end = System.currentTimeMillis();            if(LOG.isInfoEnabled()){                LOG.info("around " + joinPoint + "\tUse time : " + (end - start) + " ms!");            }        } catch (Throwable e) {            long end = System.currentTimeMillis();            if(LOG.isInfoEnabled()){                LOG.info("around " + joinPoint + "\tUse time : " + (end - start) + " ms with exception : " + e.getMessage());            }        }    }        //配置后置返回通知,使用在方法aspect()上注册的切入点    @AfterReturning("aspect()")    public void afterReturn(JoinPoint joinPoint){        if(LOG.isInfoEnabled()){            LOG.info("afterReturn " + joinPoint);        }    }        //配置抛出异常后通知,使用在方法aspect()上注册的切入点    @AfterThrowing(pointcut="aspect()", throwing="ex")    public void afterThrowing(JoinPoint joinPoint, Exception ex){        if(LOG.isInfoEnabled()){            LOG.info("afterThrow " + joinPoint + "\t" + ex.getMessage());        }    }}