Java 连接本地惠普打印机，获取打印机状态

[adzchao]

打印没有问题，想要获取本地打印机状态或者异常状态，但是一直是空的

 public static void checkPrinterStatus(PrintService printService) {
        try {
            // 获取打印机的状态原因属性
            boolean attributeCategorySupported = printService.isAttributeCategorySupported(PrinterState.class);
            System.out.println(attributeCategorySupported);
            PrinterState attribute = printService.getAttribute(PrinterState.class);

            PrinterStateReasons reasons = (PrinterStateReasons) printService.getAttribute(PrinterStateReasons.class);

            // 检查打印机是否缺纸
            if (reasons.containsKey(MEDIA_NEEDED) || reasons.containsKey(PrinterStateReason.MEDIA_LOW)|| reasons.containsKey(PrinterStateReason.MEDIA_EMPTY)) {
                System.out.println("打印机缺纸！");
            }

            // 检查打印机是否缺墨
            if (reasons.containsKey(PrinterStateReason.TONER_LOW) || reasons.containsKey(PrinterStateReason.TONER_EMPTY)) {
                System.out.println("打印机缺墨！");
            }

            // 其他状态检查...
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    
    

谁有经验给看一下呗