一.Spring的AOP的註解開發詳細過程

1.編寫目標類並配置

這個目標類並沒有實現介面,因此spring會自動用Cglib來對其進行動態代理

public class OrderDao {
     void add(){
        System.out.println("add...");
    }
     void delete(){
        System.out.println("delete...");
    }
     void update(){
        System.out.println("update...");
    }
    void find(){
        System.out.println("find...");
    }

}
 

<!--配置目標類-->
	<bean id="OrderDao" class="org.qingyu.dao.OrderDao"></bean>

2.編寫切面類並配置

//切面類
public class MyAspect {

    public void before(){
        System.out.println("前置通知...");
    }
}

<!--配置切面類-->
	<bean id="MyAspect" class="org.qingyu.aspect.MyAspect"></bean>
 

3.使用註解對目標類進行增強

//切面類
@Aspect
public class MyAspect {

    @Before(value = "execution(* org.qingyu.dao.OrderDao.add(..))")
    public void before(){
        System.out.println("前置通知...");
    }
}

4.編寫測試類

public static void main(String[] args){
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
        OrderDao orderDao = (OrderDao) applicationContext.getBean("OrderDao");
        orderDao.add();
    }
 

輸出結果如下:

前置通知...
add...

二.Spring的AOP的註解的通知型別

[email protected]  前置通知

@Before(value = "execution(* org.qingyu.dao.OrderDao.add(..))")
    public void before(){
        System.out.println("前置通知...");
    }

[email protected]     後置通知

@AfterReturning(value = "execution(* org.qingyu.dao.OrderDao.delete(..))" ,returning = "result")
    public void afterReturning(Object result){
        System.out.println("後置通知..."+result);
    }

[email protected]   環繞通知

 @Around(value = "execution(* org.qingyu.dao.OrderDao.find(..))")
    public Object around(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        System.out.println("環繞前...");
        Object obj = proceedingJoinPoint.proceed();
        System.out.println("環繞後...");
        return obj;
    }

[email protected]   異常丟擲通知

 @AfterThrowing(value = "execution(* org.qingyu.dao.OrderDao.update(..))",throwing = "e")
    public void afterThrowing(Throwable e){
        System.out.println("異常丟擲通知..."+e.getMessage());
    }

三.Spring的註解的AOP的切入點的配置

@After(value = "MyAspect.pointCut1()")
    public void after(){
        System.out.println("最終通知...");
    }

    @Pointcut(value = "execution(* org.qingyu.dao.OrderDao.update(..))")
    private void pointCut1(){}