如何返回值作爲@Before響應，出移動到（使用AOP）控制器

Question

我使用AOP概念和調度呼叫發送到通知方法之前。在這方面，如何與出進入控制器之前，建議方法的返回值？

public Object cache(JoinPoint jointPoint, RedisCache redisCache) throws Throwable{ 
String data = getRedisService().getValue(redisKey); 
if(data != null){return "hi";} 
} 

Answer 1

before advice：

Before advice runs before a matched method execution 

around advice

It has the opportunity to do work both before and after the method 
executes, and to determine when, how, and even if, the method actually 
gets to execute at all