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Spring的通知(Advice)

时间:2017-09-27 13:30:51      阅读:235      评论:0      收藏:0      [点我收藏+]

标签:row   before   []   tool   复制   round   检查   return   pre   

 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:

技术分享
1 public class LogInterceptor implements MethodInterceptor{
2       public Object invoke(MethodInvocation invocation invocation) throws Throwable{
3            System.out.println("开始审核数据...");
4            Object rval = invocation.proceed();
5            System.out.println("审核数据结束...");
6            return rval;
7 }       
8 }    
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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:

 

1 public class LogAfterAdvice implements AfterReturningAdvice{
2        public void afterReturning(Method m,Object[] args,Object target) throws Throwable{
3        System.out.println(“审核数据结束...”);
4 }
5 }

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:

1 public class LogThrowAdvice implements ThrowsAdvice{
2       public void afterThrowing(RemoteException ex) throws Throwable{
3          System.out.println("审核数据异常,请检查..."+ex);
4 }
5 }

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

Spring的通知(Advice)

标签:row   before   []   tool   复制   round   检查   return   pre   

原文地址:http://www.cnblogs.com/javaer-sww/p/7600712.html

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