AOP基于注解实现-蒲公英云

AOP基于注解实现

切面类
@Component //控制反转
@Aspect //声明切面类
public class ForumAdvisor {
//execution(* com.mitu.aspect.*.removeTopic(..))切点
@Before(“execution(* com.mitu.aspect.*.removeTopic(..))”) //声明前置增强
public void before(JoinPoint jPoint) throws Throwable {
System.out.println(“这是前置增强”);

    //获取目标对象包全名  
    String classType=jPoint.getTarget().getClass().getName();  
    Class<?> clazz=Class.forName(classType);  
    String className = clazz.getName();  
    System.out.println(className);  
    //获取目标对象类名  
    String classSimpleName = clazz.getSimpleName();  
    System.out.println(classSimpleName);  
    //获取目标对象方法名  
    String methodName = jPoint.getSignature().getName();  
    System.out.println(methodName);  
    //获取目标对象参数值  
    Object\[\] args = jPoint.getArgs();  
    System.out.println("参数："+args\[0\]);  
\}  
@After("execution(\* com.mitu.aspect.\*.\*(..))")    //声明后置增强  
public void after() \{  
    System.out.println("这是后置增强");  
\}
@Around("execution(\* com.mitu.aspect.\*.\*(..))")    //声明环绕增强  
public Object around(ProceedingJoinPoint point) throws Throwable\{  
    //计算方法耗时  
    System.out.println("这是环绕增强（前置增强）");  
    long start = System.currentTimeMillis();  
    Object object = point.proceed();  
    System.out.println("这是环绕增强（后置增强）");  
    long end = System.currentTimeMillis();  
    //获取目标对象包全名  
    String classType=point.getTarget().getClass().getName();  
    Class<?> clazz=Class.forName(classType);  
    String className = clazz.getName();  
    //获取目标对象方法名  
    String methodName = point.getSignature().getName();  
    System.out.println(className+":"+methodName+"耗时"+(end-start));  
    return object;  
\}
@AfterThrowing(pointcut="execution(\* com.mitu.aspect.\*.\*(..))",throwing="ex")    //声明抛出异常增强  
public void afterThrowing(Exception ex) \{  
    System.out.println("这是抛出异常增强");  
\}

}

aop.xml配置：
<?xml version=”1.0” encoding=”UTF-8”?>

接口类：
public interface IForumService {
public void removeTopic(int topicId);
public void removeForum(int forumId);
}

实现类：
@Component //控制反转
public class ForumServiceImp implements IForumService{

@Override  
public void removeTopic(int topicId) \{  
    try \{  
        System.out.println("删除论坛帖子："+topicId);  
        //Thread.currentThread()获取当前线程  
        Thread.currentThread().sleep(600);  
    \} catch (InterruptedException e) \{  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    \}

// throw new RuntimeException(“抛出运行时异常”);
}

@Override  
public void removeForum(int forumId) \{  
    try \{  
        System.out.println("删除论坛板块："+forumId);  
        Thread.currentThread().sleep(2000);  
    \} catch (InterruptedException e) \{  
        e.printStackTrace();  
    \}  
\}

}

测试类：
public class AnnonationAopTest {
public static void main(String[] args) {
ApplicationContext aContext = new ClassPathXmlApplicationContext(“com/mitu/annonationaop/aop.xml”);
//注意强制类型转换的类型为：接口IForumService
IForumService forumService = (IForumService)aContext.getBean(“forumServiceImp”);
forumService.removeForum(200);
forumService.removeTopic(150);
}
}