Annotation 实现 AOP

//注解实体类
package com.trip.demo;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.METHOD })
public @interface SMSAndMailSender {
　　/*短信模板String格式化串*/
　　String value() default "";

　　String smsContent() default "";

　　String mailContent() default "";
　　/*是否激活发送功能*/
　　boolean isActive() default true;
　　/*主题*/
　　String subject() default "";
}

---

//切面类   在所有标记了@SMSAndMailSender的方法中切入
@Aspect
@Component("smsAndMailSenderMonitor")
public class SMSAndMailSenderMonitor implements Ordered{

private Logger logger = LoggerFactory.getLogger(SMSAndMailSenderMonitor.class);

/**
* @param joinPoint
* @param result
*/
@AfterReturning(value="@annotation(SMSAndMailSender)", returning="result")//有注解标记的方法，执行该后置返回
public void afterReturning(JoinPoint joinPoint , Object result//注解标注的方法返回值) {
　　MethodSignature ms = (MethodSignature) joinPoint.getSignature();
　　Method method = ms.getMethod();
　　boolean active = method.getAnnotation(SMSAndMailSender.class).isActive();
　　if (!active) {
　　　　return;
　　}
　　String smsContent = method.getAnnotation(SMSAndMailSender.class).smsContent();
　　String mailContent = method.getAnnotation(SMSAndMailSender.class).mailContent();
　　String subject = method.getAnnotation(SMSAndMailSender.class).subject();

 }

@Around(value="@annotation(SMSAndMailSender)")

public void proceed(ProceedingJoinPoint point,SMSAndMailSender smsAndMailSender){

　　　　xxxx

　　return point.proceed;

}

/**
* 在抛出异常时使用
* @param joinPoint
* @param ex
*/
@AfterThrowing(value="@annotation(SMSAndMailSender)",throwing = "ex")
public void afterThrowing(JoinPoint joinPoint, Throwable ex//注解标注的方法抛出的异常) {
　　MethodSignature ms = (MethodSignature) joinPoint.getSignature();
　　Method method = ms.getMethod();
　　String subject = method.getAnnotation(SMSAndMailSender.class).subject();
}

　　

　　// 优先级高（数值最小）优先级低（竖直最大）

　　@Override

　　public int getOrder(){

　　　　return  0;　　

　　}