spring通知的注解

1、代理类接口Person.java

 1 package com.xiaostudy;
 2
 3 /**
 4  * @desc 被代理类接口
 5  *
 6  * @author xiaostudy
 7  *
 8  */
 9 public interface Person {
10
11     public void add();
12     public void update();
13     public void delete();
14 }

2、代理类PersonImple.java

 1 package com.xiaostudy;
 2
 3 import org.springframework.stereotype.Component;
 4
 5 /**
 6  * @desc 被代理类
 7  *
 8  * @author xiaostudy
 9  *
10  */
11 @Component("person")//类注解
12 public class PersonImple implements Person {
13
14     /**
15      * @desc 实现接口方法
16      */
17     public void add() {
18         System.out.println("add().....");
19     }
20
21     @Override
22     public void update() {
23         System.out.println("update().....");
24 //        int i = 1/0;
25     }
26
27     @Override
28     public void delete() {
29         System.out.println("delete().....");
30     }
31
32 }

3、通知类MyAspectJ.java

 1 package com.xiaostudy;
 2
 3 import org.aspectj.lang.JoinPoint;
 4 import org.aspectj.lang.ProceedingJoinPoint;
 5 import org.aspectj.lang.annotation.After;
 6 import org.aspectj.lang.annotation.AfterReturning;
 7 import org.aspectj.lang.annotation.AfterThrowing;
 8 import org.aspectj.lang.annotation.Around;
 9 import org.aspectj.lang.annotation.Aspect;
10 import org.aspectj.lang.annotation.Before;
11 import org.aspectj.lang.annotation.Pointcut;
12 import org.springframework.stereotype.Component;
13
14 /**
15  * @desc 通知类
16  *
17  * @author xiaostudy
18  *
19  */
20 @Component//类注解
21 @Aspect//AspectJ注解
22 public class MyAspectJ {
23
24     //声明公共切入点
25     @Pointcut("execution(* com.xiaostudy.PersonImple.*(..))")
26     public void myPointcut() {
27
28     }
29
30     //前置通知注解，只有一个参数时，value可以省略不写
31     @Before("execution(* com.xiaostudy.PersonImple.*(..))")
32     public void myBefort(JoinPoint joinPoint) {
33         System.out.println("前置通知>>>>>>>>>joinPoint: " + joinPoint.getSignature().getName());
34     }
35
36     //后置通知注解，当参数大于1时，value必须写
37     @AfterReturning(value="myPointcut()", returning="ret")
38     public void myAfterReturning(JoinPoint joinPoint, Object ret) {
39         System.out.println("后置通知>>>>>>>>>joinPoint: " + joinPoint.getSignature().getName()
40                 + ", ret: " + ret);
41     }
42
43     //环绕通知注解
44     @Around("myPointcut()")
45     public Object myAround(ProceedingJoinPoint joinPoint) throws Throwable {
46         System.out.println("环绕通知====前>>>>>>>>>>>");
47         Object obj = joinPoint.proceed();
48         System.out.println("环绕通知====后<<<<<<<<<<<");
49         return obj;
50     }
51
52     //异常通知注解
53     @AfterThrowing(value="myPointcut()", throwing="e")
54     public void myThrowint(JoinPoint joinPoint, Throwable e) {
55         System.out.println("异常通知>>>>>>>>>joinPoint: " + joinPoint.getSignature().getName()
56                 + ", e: " + e.getMessage());
57         System.exit(0);
58     }
59
60     //最终通知注解
61     @After("myPointcut()")
62     public void myAfter(JoinPoint joinPoint) {
63         System.out.println("最终通知>>>>>>>>>joinPoint: " + joinPoint.getSignature().getName());
64     }
65 }

4、spring配置文件applicationContext.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xmlns:aop="http://www.springframework.org/schema/aop"
 5        xmlns:context="http://www.springframework.org/schema/context"
 6        xsi:schemaLocation="http://www.springframework.org/schema/beans
 7                               http://www.springframework.org/schema/beans/spring-beans.xsd
 8                               http://www.springframework.org/schema/aop
 9                               http://www.springframework.org/schema/aop/spring-aop.xsd
10                               http://www.springframework.org/schema/context
11                               http://www.springframework.org/schema/context/spring-context.xsd">
12     <!-- 扫描注解类 -->
13     <context:component-scan base-package="com.xiaostudy"></context:component-scan>
14     <!-- 确定 AOP注解生效 -->
15     <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
16 </beans>

5、测试类Test.java

 1 package com.xiaostudy;
 2
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5
 6 /**
 7  * @desc 测试类
 8  *
 9  * @author xiaostudy
10  *
11  */
12 public class Test {
13
14     public static void main(String[] args) {
15         ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
16         Person person = ac.getBean("person", Person.class);
17         person.add();
18         person.update();
19         person.delete();
20     }
21
22 }

原文地址：https://www.cnblogs.com/xiaostudy/p/9535947.html