我是韩国杨南大学计算机工程系的学生。
首先，抱歉我英语能力差。
我需要帮助。
我找到了适用于Java的USB API。
我需要USB设备的PID，VID和唯一的序列号，因为我需要为我的项目识别每个USB设备（只是大容量存储设备）。
我使用下面的示例代码。 （这是usb4java API示例代码。） 此代码向我展示了有关USB HUD和连接设备的一些信息。
package org.usb4java.javax.examples;
import java.io.UnsupportedEncodingException;
import java.util.List;
import javax.usb.UsbConfiguration;
import javax.usb.UsbDevice;
import javax.usb.UsbDisconnectedException;
import javax.usb.UsbEndpoint;
import javax.usb.UsbException;
import javax.usb.UsbHostManager;
import javax.usb.UsbHub;
import javax.usb.UsbInterface;
import javax.usb.UsbPort;
import javax.usb.UsbServices;
/**
* Dumps all devices by using the javax-usb API.
*
* @author Klaus Reimer <k@ailis.de>
*/
public class DumpDevices
{
/**
* Dumps the specified USB device to stdout.
*
* @param device
* The USB device to dump.
*/
private static void dumpDevice(final UsbDevice device)
{
// Dump information about the device itself
System.out.println(device);
final UsbPort port = device.getParentUsbPort();
if (port != null)
{
System.out.println("Connected to port: " + port.getPortNumber());
System.out.println("Parent: " + port.getUsbHub());
}
// Dump device descriptor
System.out.println(device.getUsbDeviceDescriptor());
// Process all configurations
for (UsbConfiguration configuration: (List<UsbConfiguration>) device
.getUsbConfigurations())
{
// Dump configuration descriptor
System.out.println(configuration.getUsbConfigurationDescriptor());
// Process all interfaces
for (UsbInterface iface: (List<UsbInterface>) configuration
.getUsbInterfaces())
{
// Dump the interface descriptor
System.out.println(iface.getUsbInterfaceDescriptor());
// Process all endpoints
for (UsbEndpoint endpoint: (List<UsbEndpoint>) iface
.getUsbEndpoints())
{
// Dump the endpoint descriptor
System.out.println(endpoint.getUsbEndpointDescriptor());
}
}
}
System.out.println();
// Dump child devices if device is a hub
if (device.isUsbHub())
{
final UsbHub hub = (UsbHub) device;
for (UsbDevice child: (List<UsbDevice>) hub.getAttachedUsbDevices())
{
dumpDevice(child);
}
}
}
/**
* Main method.
*
* @param args
* Command-line arguments (Ignored)
* @throws UsbException
* When an USB error was reported which wasn't handled by this
* program itself.
*/
public static void main(final String[] args) throws UsbException
{
// Get the USB services and dump information about them
final UsbServices services = UsbHostManager.getUsbServices();
System.out.println("USB Service Implementation: "
+ services.getImpDescription());
System.out.println("Implementation version: "
+ services.getImpVersion());
System.out.println("Service API version: " + services.getApiVersion());
System.out.println();
// Dump the root USB hub
dumpDevice(services.getRootUsbHub());
}
}
并且此代码结果如下：
USB Service Implementation: usb4java
Implementation version: 1.2.0
Service API version: 1.0.2
usb4java root hub 1.0.0
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.01
bDeviceClass 9 Hub
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0xffff
idProduct 0xffff
bcdDevice 0.00
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 18
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
bMaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 9 Hub
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Bus 002 Device 007: ID 203a:fffa
Connected to port: 1
Parent: usb4java root hub 1.0.0
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 Per Interface
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x203a
idProduct 0xfffa
bcdDevice 1.00
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 1
bmAttributes 0xc0
Self Powered
bMaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 7 Printer
bInterfaceSubClass 1
bInterfaceProtocol 1
iInterface 4
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 512
bInterval 0
.
.
.
.
Bus 002 Device 003: ID 152d:2329
Connected to port: 3
Parent: usb4java root hub 1.0.0
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 Per Interface
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x152d
idProduct 0x2329
bcdDevice 1.00
iManufacturer 1
iProduct 2
iSerial 5
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 4
bmAttributes 0xc0
Self Powered
bMaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6
bInterfaceProtocol 80
iInterface 6
.
.
.
.
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 512
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 512
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 512
bInterval 0
在代码的结果中，有大容量存储，我可以看到PID和VID，但是有iserialnumber（设备描述符中的序列号索引）而不是真正的序列号。
我认为要识别每个USB大容量存储设备，需要组合PID，VID，S / N.
我如何获得序列号？
在Usb4Java，Javax.usb，libusb中，这些API不包括'getSerialnumber（）'等方法。
请帮帮我。
答案 0 :(得分：1)
“iSerial”是设备字符串表中版本字符串的索引。您可以使用设备上的getString(byte)方法检索相应的字符串。 “iManufacturer”和“iProduct”也是如此。
请注意，并非所有设备都有唯一的序列号。