我正在尝试在对话框中显示打印机位置。但令我惊讶的是,没有任何打印服务似乎具有位置属性 - 尽管我确认我的某些打印机确实在Windows打印机控制面板中显示了一个位置。
我使用此代码打印位置(它始终为该位置打印“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);
}
}
}
这是不是由JRE支持/实施,还是我在这里做错了? 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
EDIT2:正如所建议的那样,我打印出所有属性:
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,我机器上的任何打印机都没有PrinterLocation。
答案 0 :(得分:2)
来自http://download.java.net/jdk8/docs/api/javax/print/attribute/package-summary.html,
打印机开始处理打印作业后,可以获得有关作业的其他信息,其中可能包括:作业状态(例如已完成或排队)以及到目前为止打印的页数。这些信息也是属性。属性还可以描述打印机本身,例如:打印机名称,打印机位置以及排队的作业数。
不确定这是否意味着它在启动进程后变得可用