[英]How can I get list of all drives but also get the corresponding drive type (removable,local disk, or cd-rom,dvd-rom... etc)?
如何获取所有驱动器的列表,同时获取相应的驱动器类型(可移动、本地磁盘或 cd-rom、dvd-rom 等)?
使用此代码,您可以获得所有驱动器及其类型说明
File[] paths;
FileSystemView fsv = FileSystemView.getFileSystemView();
// returns pathnames for files and directory
paths = File.listRoots();
// for each pathname in pathname array
for(File path:paths)
{
// prints file and directory paths
System.out.println("Drive Name: "+path);
System.out.println("Description: "+fsv.getSystemTypeDescription(path));
}
假设它是 windows,使用File.listRoots()
获取所有根。 然后使用FileSystemView
检查它是软盘还是驱动器。 除此之外我不知道。
此代码段适用于 Windows。 它正确地将 USB 笔式驱动器报告为可移动,但在我的笔记本电脑上,USB 硬盘被标记为不可移动。 无论如何,这是我在不使用本机代码的情况下发现的最好的。
for (Path root : FileSystems.getDefault().getRootDirectories()) {
FileStore fileStore = Files.getFileStore(root);
System.out.format("%s\t%s\n", root, fileStore.getAttribute("volume:isRemovable"));
}
来源: 这个文件显然来自 JDK
你问的问题没有定义。
我有一个拇指驱动器,当我插入它时,它显示为 CD-ROM。 在我运行 CD-ROM 上的程序后,它附加了第二个分区,它似乎是一个硬盘驱动器。
我有可移动的 CD-ROM 驱动器。 我的计算机外部也有“内部”eSATA 硬盘驱动器。
您必须非常努力地获得驱动器“类型”的绑定定义。 你为什么不告诉我们你想做什么,而不是询问你想要做的特定方式?
如果您使用JACOB
,您可以列出所有驱动器以及适当的类型:
import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.Dispatch;
import com.jacob.com.EnumVariant;
import com.jacob.com.JacobObject;
import com.jacob.com.Variant;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
public class DrivesExample
{
public interface HasNativeValue
{
int getNativeValue();
}
public enum DriveTypeEnum implements HasNativeValue
{
Unknown(0),
NoRootDirectory(1),
RemovableDisk(2),
LocalDisk(3),
NetworkDrive(4),
CompactDisc(5),
RAMDisk(6);
public final int nativeValue;
DriveTypeEnum(int nativeValue)
{
this.nativeValue = nativeValue;
}
public int getNativeValue()
{
return nativeValue;
}
}
private static <T extends Enum<T> & HasNativeValue> T fromNative(Class<T> clazz, int value)
{
for (T c : clazz.getEnumConstants())
{
if (c.getNativeValue() == value)
{
return c;
}
}
return null;
}
/**
* The drive information.
*/
public static final class Drive
{
/**
* File system on the logical disk. Example: NTFS. null if not known.
*/
public final String fileSystem;
/**
* Value that corresponds to the type of disk drive this logical disk represents.
*/
public final DriveTypeEnum driveType;
/**
* The Java file, e.g. "C:\". Never null.
*/
public final File file;
public Drive(String fileSystem, DriveTypeEnum driveType, File file)
{
this.fileSystem = fileSystem;
this.driveType = driveType;
this.file = file;
}
@Override
public String toString()
{
return "Drive{" + file + ": " + driveType + ", fileSystem=" + fileSystem + "}";
}
}
/**
* Lists all available Windows drives without actually touching them. This call should not block on cd-roms, floppies, network drives etc.
*
* @return a list of drives, never null, may be empty.
*/
public static List<Drive> getDrives()
{
List<Drive> result = new ArrayList<>();
ActiveXComponent axWMI = new ActiveXComponent("winmgmts://");
try
{
Variant devices = axWMI.invoke("ExecQuery", new Variant("Select DeviceID,DriveType,FileSystem from Win32_LogicalDisk"));
EnumVariant deviceList = new EnumVariant(devices.toDispatch());
while (deviceList.hasMoreElements())
{
Dispatch item = deviceList.nextElement().toDispatch();
String drive = Dispatch.call(item, "DeviceID").toString().toUpperCase();
File file = new File(drive + "/");
DriveTypeEnum driveType = fromNative(DriveTypeEnum.class, Dispatch.call(item, "DriveType").getInt());
String fileSystem = Dispatch.call(item, "FileSystem").toString();
result.add(new Drive(fileSystem, driveType, file));
}
return result;
} finally
{
closeQuietly(axWMI);
}
}
private static void closeQuietly(JacobObject jacobObject)
{
try
{
jacobObject.safeRelease();
} catch (Exception ex)
{
ex.printStackTrace();
}
}
public static void main(String[] arguments)
{
List<Drive> drives = getDrives();
for (Drive drive : drives)
{
System.out.println(drive.toString());
}
}
}
示例输出:
Drive{C:\: LocalDisk, fileSystem=NTFS}
Drive{D:\: LocalDisk, fileSystem=NTFS}
Drive{E:\: RemovableDisk, fileSystem=NTFS}
Drive{F:\: RemovableDisk, fileSystem=FAT32}
Drive{G:\: RemovableDisk, fileSystem=null}
Drive{Y:\: NetworkDrive, fileSystem=NTFS}
要使用JACOB
,请将下载中的JAR
和DLL
作为库添加到您的项目中。 此解决方案当然仅适用于Windows
。
正确的方法是 Luciano 如何回答 isRemovable 属性,但我最近在 win 10 上发现,如果我从 USB 启动,则在该方法中不再找到 USB。
因此,我仅针对 Windows 使用了以下 wmic 调用:
ArrayList<File> rootDirs = new ArrayList<File>();
if( isWin )
{
if( i_dolog )
LOG.info( "Windows found as OS." );
ArrayList<String> partids = new ArrayList<String>();
String results0 = execute( "wmic diskdrive where interfacetype='USB' assoc /assocclass:Win32_DiskDriveToDiskPartition" );
String lines[] = results0.split( "\r\r\n" );
for( String line : lines )
{
String test = "Win32_DiskPartition.DeviceID=";
int index = line.indexOf( test );
if( index >= 0 )
{
String partid = line.substring( index + test.length() + 1 );
partid = partid.substring( 0, partid.indexOf( '"' ) );
partids.add( partid );
}
}
for( String partition : partids )
{
String results2 = execute( "wmic partition where (DeviceID='" + partition + "') assoc /assocclass:Win32_LogicalDiskToPartition" );
String lines2[] = results2.split( "\r\r\n" );
for( String line : lines2 )
{
String test = "Win32_LogicalDisk.DeviceID=";
int index = line.indexOf( test );
if( index >= 0 )
{
String partid = line.substring( index + test.length() + 1 );
partid = partid.substring( 0, partid.indexOf( '"' ) );
rootDirs.add( new File( partid + "\\" ) );
}
}
}
}
File[] roots = File.listRoots();
for(int i=0;i<roots.length;i++)
System.out.println("Root["+i+"]:" + roots[i]);
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