Spring的AOP的注解的通知类型，切入点的注解

Spring的注解的AOP的通知类型

• @Before：前置通知

• @AfterReturning：后置通知

• @Around：环绕通知

• @AfterThrowing：异常抛出通知

• @After:最终通知

• @Pointcut：切入点的注解

  1 /** 2 * 切面类：注解的切面类 3 / 4 @Aspect 5 public class MyAspectAnno { 6 //前置通知 7 @Before(value="execution( com.itheima.spring.demo1.OrderDao.save(..) )") 8 public void before(){ 9 System.out.println("前置通知======"); 10 } 11 //后置通知 12 @AfterReturning(value="execution(* com.itheima.spring.demo1.OrderDao.delete(..))", returning="result") 13 public void afterReturning(Object result){ 14 System.out.println("后置通知====="+result); 15 } 16 @Around(value="execution(* com.itheima.spring.demo1.OrderDao.update(..))") 17 public Object around(ProceedingJoinPoint joinPoint) throws Throwable{ 18 System.out.println("环绕前增强====="); 19 Object obj = joinPoint.proceed(); 20 System.out.println("环绕后增强====="); 21 return obj; 22 } 23 //异常抛出通知 24 @AfterThrowing(value="execution(* com.itheima.spring.demo1.OrderDao.find(..))" , throwing="e") 25 public void find(Throwable e ){ 26 System.out.println("异常抛出通知======"+e.getMessage()); 27 } 28 //最终通知： 29 @After(value="execution(* com.itheima.spring.demo1.OrderDao.find(..))") 30 public void after( ){ 31 System.out.println("最终通知======"); 32 } 33 }

 切入点的注解：

配置@Pointcut注解，使用类名.方法

1/**
2 * 切面类：注解的切面类
3 */
4@Aspect
5public class MyAspectAnno {
6    //切入点的注解
7    @Pointcut(value="execution(* com.itheima.spring.demo1.OrderDao.find(..))")
8    private void pointcut1(){}
9    
10    @Pointcut(value="execution(* com.itheima.spring.demo1.OrderDao.save(..))")
11    private void pointcut2(){}
12    
13    @Pointcut(value="execution(* com.itheima.spring.demo1.OrderDao.update(..))")
14    private void pointcut3(){}
15    
16    @Pointcut(value="execution(* com.itheima.spring.demo1.OrderDao.delete(..))")
17    private void pointcut4(){}
18    
19    //前置通知
20    @Before(value="MyAspectAnno.pointcut2()")
21    public void before(){
22       System.out.println("前置通知======");
23   }
24  //后置通知
25    @AfterReturning(value="MyAspectAnno.pointcut4()", returning="result")
26    public void afterReturning(Object result){
27        System.out.println("后置通知====="+result);
28    } //环绕通知
29    @Around(value="MyAspectAnno.pointcut3()")
30    public Object around(ProceedingJoinPoint joinPoint) throws Throwable{
31        System.out.println("环绕前增强=====");
32        Object obj = joinPoint.proceed();
33        System.out.println("环绕后增强=====");
34        return obj;
35    }
36    //异常抛出通知
37    @AfterThrowing(value="MyAspectAnno.pointcut1()" , throwing="e")
38    public void find(Throwable e ){
39       System.out.println("异常抛出通知======"+e.getMessage());
40   }
41
42  // 最终通知：
43    @After(value="MyAspectAnno.pointcut1()")
44    public void after( ){
45       System.out.println("最终通知======");
46   }
47    
48
49
50}