Spring的通知(Advice)

本文内容纲要:Spring的通知(Advice)

  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:

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 }

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

本文内容总结:Spring的通知(Advice)

原文链接:https://www.cnblogs.com/victoria-c/p/5737354.html

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