Java中的扩展打印机信息

Question

我正在尝试获取有关系统上打印机的一些信息。
在Windows和Linux上，使用以下代码，仅PrinterName填充属性：

PrintService[] printServices = PrintServiceLookup.lookupPrintServices(null,null);
for( PrintService printService : printServices ) {
    log.info("Found print service: "+printService);
    log.info(printService.getAttribute(PrinterName.class));
    log.info(printService.getAttribute(PrinterLocation.class));
    log.info(printService.getAttribute(PrinterMakeAndModel.class));
    log.info(printService.getAttribute(PrinterMessageFromOperator.class));
    log.info(printService.getAttribute(PrinterMoreInfo.class));
    log.info(printService.getAttribute(PrinterMoreInfoManufacturer.class));
    log.info(printService.getAttribute(PrinterState.class));
    log.info(printService.getAttribute(PrinterStateReasons.class));
    log.info(printService.getAttribute(PrinterURI.class));
}

在使用该toArray()功能之后…

log.info("Found print service: "+printService);
for( Attribute a : printService.getAttributes().toArray() ) {
    log.info("* "+a.getName()+": "+a);
}

…这是结果：

找到的打印服务：Win32打印机：Brother MFC-9420CN BR-Script3
*支持颜色：支持
*打印机名称：Brother MFC-9420CN BR-Script3
*打印机正在接受工作：正在接受工作
*排队人数：0

如何获得更多信息 ，例如打印机注释？

Answer 1

还有其他PrintServiceAttribute实现，但是如果您想获取更多…

这只是一个 肮脏的 代码，您还可以获取不受支持的doc值：

PrintService[] printServices =
        PrintServiceLookup.lookupPrintServices(null, null); //get printers

for (PrintService printService : printServices) {
    System.out.println("Found print service: " + printService);

    Set<Attribute> attribSet = new LinkedHashSet<Attribute>();

    Class<? extends Attribute>[] supportedAttributeCategories = (Class<? extends Attribute>[]) printService.getSupportedAttributeCategories();

    for (Class<? extends Attribute> category : supportedAttributeCategories) {
        DocFlavor[] flavors = printService.getSupportedDocFlavors();
        for (DocFlavor flavor : flavors) {
            Object supportedAttributeValues = printService.getSupportedAttributeValues(category, flavor, printService.getAttributes());
            if (supportedAttributeValues instanceof Attribute) {
                Attribute attr = (Attribute) supportedAttributeValues;
                attribSet.add(attr);
            } else if (supportedAttributeValues != null) {
                Attribute[] attrs = (Attribute[]) supportedAttributeValues;
                for (Attribute attr : attrs) {
                    attribSet.add(attr);
                }
            }
        }
    }

    for (Attribute attr : attribSet) {
        System.out.println(attr.getName());

        System.out.println(printService.getDefaultAttributeValue(attr.getCategory()));
    }
}

注意： 您可能会看到重复的值，但是可以对其进行过滤。