AOP 切面类实现计算器功能增强 - 显示运算数、除零错误处理

public aspect ValidationAspect {

pointcut calculation(): execution(* Calculator.*(..));
pointcut division(): execution(* Calculator.div(..));

before(): calculation() {
    System.out.println('运算数为：' + thisJoinPoint.getArgs()[0] + ' 和 ' + thisJoinPoint.getArgs()[1]);
}

before(): division() {
    if(thisJoinPoint.getArgs()[1] == 0) {
        System.out.println('当前除数为0，请修改后重新计算');
        throw new IllegalArgumentException('除数不能为0');
    }
}

}