吃透Spring源码（二十）：AOP拦截器链执行过程

文章目录

- 例子准备
一，执行流程
二，获取拦截器链
三，执行拦截器链
- 1，ExposeInvocationInterceptor
- 2，AspectJAfterThrowingAdvice
- 3，AfterReturningAdviceInterceptor
- 4，AspectJAfterAdvice
- 5，AspectJAroundAdvice
- 6，MethodBeforeAdviceInterceptor
- 7，返回到AspectJAroundAdvice
- 8，返回到AspectJAfterAdvice
- 9，返回到AfterReturningAdviceInterceptor
- 10，返回到AspectJAfterThrowingAdvice
- 11，返回到ExposeInvocationInterceptor
四，总结

例子准备

LogUtil.java

public class LogUtil {
   
     

    private int start(JoinPoint joinPoint){
   
     
        //获取方法签名
        Signature signature = joinPoint.getSignature();
        //获取参数信息
        Object[] args = joinPoint.getArgs();
        System.out.println("log---"+signature.getName()+"方法开始执行：参数是"+Arrays.asList(args));
        return 100;
    }

    public static void stop(JoinPoint joinPoint,Object result){
   
     
        Signature signature = joinPoint.getSignature();
        System.out.println("log---"+signature.getName()+"方法执行结束，结果是："+result);
    }

    public static void logException(JoinPoint joinPoint,Exception e){
   
     
        Signature signature = joinPoint.getSignature();
        System.out.println("log---"+signature.getName()+"方法抛出异常："+e.getMessage());
    }

    public static void logFinally(JoinPoint joinPoint){
   
     
        Signature signature = joinPoint.getSignature();
        System.out.println("log---"+signature.getName()+"方法执行结束。。。。。over");

    }

    public Object around(ProceedingJoinPoint pjp) throws Throwable {
   
     
        Signature signature = pjp.getSignature();
        Object[] args = pjp.getArgs();
        Object result = null;
        try {
   
     
            System.out.println("log---环绕通知start："+signature.getName()+"方法开始执行，参数为："+Arrays.asList(args));
            result = pjp.proceed(args);
            System.out.println("log---环绕通知stop"+signature.getName()+"方法执行结束");
        } catch (Throwable throwable) {
   
     
            System.out.println("log---环绕异常通知："+signature.getName()+"出现异常");
            throw throwable;
        }finally {
   
     
            System.out.println("log---环绕返回通知："+signature.getName()+"方法返回结果是："+result);
        }
        return result;
    }
}

文章目录​

例子准备​

文章目录

例子准备