提取相同的建议代码

Question

我有两个建议：

let localPlayer = GKLocalPlayer() 

有很复杂的代码重复。我尝试将同一个主体提取到一个分开的方法中，如下所示

public aspect LogAspect {
    before() : execution(@Log * *(..)) {
        System.out.println(thisJoinPoint.getClass());
        Logger logger = Logger.getLogger(thisJoinPoint.getClass());
        String className = thisJoinPoint.getClass().getSimpleName();
        System.out.println(thisJoinPoint.getSignature().getName());
        String methodName = thisJoinPoint.getSignature().getName();
        String startInfoMessage = String.format("%s.%s: execution started", className, methodName);
        logger.info(startInfoMessage);
    }

    after() : execution(@Log * *(..)) {
        System.out.println(thisJoinPoint.getClass());
        Logger logger = Logger.getLogger(thisJoinPoint.getClass());
        String className = thisJoinPoint.getClass().getSimpleName();
        System.out.println(thisJoinPoint.getSignature().getName());
        String methodName = thisJoinPoint.getSignature().getName();
        String endInfoMessage = String.format("%s.%s: execution's finished", className, methodName);
        logger.info(startInfoMessage);
    }
}

但它不起作用，因为编译器在建议之外不知道 private String getInfoMessage(String pattern){ System.out.println(thisJoinPoint.getClass()); Logger logger = Logger.getLogger(thisJoinPoint.getClass()); String className = thisJoinPoint.getClass().getSimpleName(); System.out.println(thisJoinPoint.getSignature().getName()); String methodName = thisJoinPoint.getSignature().getName(); String infoMessage = String.format(pattern, className, methodName); return infoMessage; } 。这些事情的解决方案是什么？