如果说List集合不为null, 则返回true

1. 如果说List集合不为null, 则返回true

// 调用
if (checkStock(order.getOrderItem())) {}
 
// 如果说List集合不为null, 则返回true
private boolean checkStock(List<OrderItem> orderItems) {
	Boolean res = false;
	for(OrderItem orderItem : orderItems){
		if(orderItem.getRealAmount() != null && orderItem.getOriAmount().compareTo(orderItem.getRealAmount())!=0){
			return true;
		}
	}
	return res;
}