Spring提供了5种Advice类型：
Interception Around：JointPoint前后调用
Before：JointPoint前调用
After Returning：JointPoint后调用
Throw：JoinPoint抛出异常时调用
Introduction：JointPoint调用完毕后调用
Interception Around通知
Interception Around通知会在JoinPoint的前后执行。实现此通知的类需要实现接口MethodInterceptor，示例代码如下：
public class LogInterceptor implements MethodInterceptor{
public Object invoke(MethodInvocation invocation invocation) throws Throwable{
System.out.println("开始审核数据...");
Object rval = invocation.proceed();
System.out.println("审核数据结束...");
return rval;
}
}
Before通知
只在JointPoint前执行，实现Before通知的类需要实现接口MethodBeforeAdvice，示例带入如下：
1 public class LogBeforeAdvice implements MethodBeforeAdvice{
2 public void before(Method m,Object[] args,Object target) throw Throwable{
3 System.out.println("开始审核数据...");
4 }
5 }
After Returning通知
只在JointPoint之后执行，实现After Returning通知的类需要实现接口AfterReturningAdvice，示例代码如下：
public class LogAfterAdvice implements AfterReturningAdvice{
public void afterReturning(Method m,Object[] args,Object target) throws Throwable{
System.out.println(“审核数据结束...”);
}
}
Throw通知
只在JointPoint抛出异常时执行，实现Throw通知的类需要实现接口ThrowsAdvice,示例代码如下：
public class LogThrowAdvice implements ThrowsAdvice{
public void afterThrowing(RemoteException ex) throws Throwable{
System.out.println("审核数据异常，请检查..."+ex)；
}
}
Introduction通知
只在JointPoint调用完毕后执行，实现Introduction通知的类需要实现接口IntroductionAdvisor和接口IntroductionInterceptor
