SpringAOP实现限流判断或者日志记录-玩具

1.自定义注解

2.切面代码

    @Pointcut("@annotation(com.wc88.annotation.Lanjie)")
    private void pointcutOne(){
    }
   
    @Around("pointcutOne()")
    public Object doit(ProceedingJoinPoint jp) throws Throwable {
        try {
            MethodSignature methodSignature = (MethodSignature) jp.getSignature();
            Class clzz = methodSignature.getReturnType();
            Object obj = clzz.newInstance();
            //此注解修饰的接口返回类中都应包含一个返回头类Sub
            Sub sub = new Sub();
            sub.setErrorNo("000001");
            sub.setErrorInfo("wc88");
            Field nameField = clzz.getDeclaredField("sub");//ResponseHeader
            nameField.setAccessible(true);
            
            // 如果限流了
            nameField.set(obj, sub);
            return  obj;

            // 如果没有限流
             return  jp.proceed();
        } catch (Throwable e) {
          return  jp.proceed();
        }
    }