如何获取打印机的位置

我正在尝试在对话框中显示打印机位置。但令我惊讶的是，没有打印服务似乎具有位置属性 - 尽管我验证了我的某些打印机确实在Windows打印机控制面板中显示位置。

我使用此代码来打印位置（它始终为位置打印“null”）。我的 Java 版本是 1.7.0_21：

public class PrintLocation {

public static void main(String[] argv) {
    PrintService[] services = PrintServiceLookup.lookupPrintServices(null, null);
    for (PrintService service : services) {
        Object location = service.getAttribute(PrinterLocation.class);
        System.out.println(service.getName() + " - " + location);
    }
}

}

这是JRE不支持/实现的，还是我在这里做错了什么？如何获取打印机的位置？

编辑：我的机器上的输出是：

\\srv51\SIR-2725-01_KX_color - null
\\srv51\SIR-2725-01_KX_sw - null
Microsoft XPS Document Writer - null
Microsoft Office Document Image Writer - null
FreePDF XP - null

编辑2：按照建议，我打印出了所有属性：

PrintService[] services = PrintServiceLookup.lookupPrintServices(null, null);
for (PrintService service : services) {
    PrintServiceAttributeSet attrs = service.getAttributes();
        System.out.println("Service: " + service.getName());
        int i = 1;
        for (Object attr : attrs.toArray()) {
        System.out.println("Attr #" + i + ": " + attr.getClass().getSimpleName()
            + ", " + attr);
        ++i;
    }
}

我得到了：

Service: \\srv51\SIR-2725-01_KX_color
Attr #1: ColorSupported, supported
Attr #2: PrinterName, \\srv51\SIR-2725-01_KX_color
Attr #3: QueuedJobCount, 0
Attr #4: PrinterIsAcceptingJobs, accepting-jobs
Service: \\srv51\SIR-2725-01_KX_sw
Attr #1: ColorSupported, supported
Attr #2: PrinterName, \\srv51\SIR-2725-01_KX_sw
Attr #3: QueuedJobCount, 0
Attr #4: PrinterIsAcceptingJobs, accepting-jobs
Service: Microsoft XPS Document Writer
Attr #1: ColorSupported, supported
Attr #2: PrinterName, Microsoft XPS Document Writer
Attr #3: QueuedJobCount, 0
Attr #4: PrinterIsAcceptingJobs, accepting-jobs
Service: Microsoft Office Document Image Writer
Attr #1: ColorSupported, not-supported
Attr #2: PrinterName, Microsoft Office Document Image Writer
Attr #3: QueuedJobCount, 0
Attr #4: PrinterIsAcceptingJobs, accepting-jobs
Service: FreePDF XP
Attr #1: ColorSupported, supported
Attr #2: PrinterName, FreePDF XP
Attr #3: QueuedJobCount, 0
Attr #4: PrinterIsAcceptingJobs, accepting-jobs

因此，我的机器上的任何打印机都没有打印机位置。