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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