求用jsr 80写的java程序访问usb设备
怎么让下面的程序把usb设备打印出来?或者你给一段别的程序也行。
import javax.usb.*;
import java.util.List;
public class TraverseUSB
{
public static void main(String argv[])
{
try
{
UsbServices services = UsbHostManager.getUsbServices();
UsbHub rootHub = services.getRootUsbHub();
traverse(rootHub);
} catch (Exception e) {}
}
public static void traverse(UsbDevice device)
{
if (device.isUsbHub())
{
List attachedDevices =
((UsbHub) device).getAttachedUsbDevices();
for (int i=0; i<attachedDevices.size(); i++)
{
traverse((UsbDevice) attachedDevices.get(i));
}
}
else
{
}
}
} java usb
[解决办法]
import usb.core.*;
public class ListUSB
{
public static void main(String[] args)
{
try
{
// Bootstrap by getting the USB Host from the HostFactory.
Host host = HostFactory.getHost();
// Obtain a list of the USB buses available on the Host.
Bus[] bus = host.getBusses();
int total_bus = bus.length;
// Traverse through all the USB buses.
for (int i=0; i<total_bus; i++)
{
// Access the root hub on the USB bus and obtain the
// number of USB ports available on the root hub.
Device root = bus[i].getRootHub();
int total_port = root.getNumPorts();
// Traverse through all the USB ports available on the
// root hub. It should be mentioned that the numbering
// starts from 1, not 0.
for (int j=1; j<=total_port; j++)
{
// Obtain the Device connected to the port.
Device device = root.getChild(j);
if (device != null)
{
// USB device available, do something here.
}
}
}
} catch (Exception e)
{
System.out.println(e.getMessage());
}
}