正在阅读：在Java应用程序中访问USB设备在Java应用程序中访问USB设备

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　　　{
　　　　// 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());
　　}
　}

if (device != null)
{
　// Obtain the current Configuration of the device and the number of
　// Interfaces available under the current Configuration.
　Configuration config = device.getConfiguration();
　int total_interface = config.getNumInterfaces();

　// Traverse through the Interfaces
　for (int k=0; k　{
　　// Access the currently Interface and obtain the number of
　　// endpoints available on the Interface.
　　Interface itf = config.getInterface(k, 0);
　　int total_ep = itf.getNumEndpoints();

　　// Traverse through all the endpoints.
　　for (int l=0; l　　{
　　　// Access the endpoint, and obtain its I/O type.
　　　Endpoint ep = itf.getEndpoint(l);
　　　String io_type = ep.getType();
　　　boolean input = ep.isInput();

　　　// If the endpoint is an input endpoint, obtain its
　　　// InputStream and read in data.
　　　if (input)
　　　{
　　　　InputStream in;
　　　　in = ep.getInputStream();
　　　　// Read in data here
　　　　in.close();
　　　}
　　　// If the Endpoint is and output Endpoint, obtain its
　　　// OutputStream and write out data.
　　　else
　　　{
　　　　OutputStream out;
　　　　out = ep.getOutputStream();
　　　　// Write out data here.
　　　　out.close();
　　　}
　　}
　}
}