java - 在 java 中识别磁盘类型的文件系统格式，如 ntfs、fat16/32 或 ext

Question

有没有办法在java中找出磁盘的文件系统格式？

例如，对于 Windows 硬盘驱动器，它可以是 NTFS，对于 zip 驱动器，它是 FAT32。

Answer 1

注意这只对在Windows系统上运行的Java有效:

使用 JNA，您可以调用 Win32 Kernel32 的 GetVolumeInformation() 来检索 lpFileSystemNameBuffer 参数，该参数接收文件系统的名称，例如 FAT 文件系统或 NTFS 文件系统 http://msdn.microsoft.com/en-us/library/windows/desktop/aa364993(v=vs.85).aspx

Kernel32.java:

package filesystem;


import java.util.HashMap;
import java.util.Map;

import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.platform.win32.WinDef.DWORD;
import com.sun.jna.ptr.IntByReference;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIFunctionMapper;
import com.sun.jna.win32.W32APITypeMapper;

public interface Kernel32 extends StdCallLibrary {

    final static Map<String, Object> WIN32API_OPTIONS = new HashMap<String, Object>() {

        private static final long serialVersionUID = 1L;

        {
            put(Library.OPTION_FUNCTION_MAPPER, W32APIFunctionMapper.UNICODE);
            put(Library.OPTION_TYPE_MAPPER, W32APITypeMapper.UNICODE);
        }
    };

    public Kernel32 INSTANCE = (Kernel32) Native.loadLibrary("Kernel32", Kernel32.class, WIN32API_OPTIONS);

    /*
    BOOL WINAPI GetVolumeInformation(
            __in_opt   LPCTSTR lpRootPathName,
            __out      LPTSTR lpVolumeNameBuffer,
            __in       DWORD nVolumeNameSize,
            __out_opt  LPDWORD lpVolumeSerialNumber,
            __out_opt  LPDWORD lpMaximumComponentLength,
            __out_opt  LPDWORD lpFileSystemFlags,
            __out      LPTSTR lpFileSystemNameBuffer,
            __in       DWORD nFileSystemNameSize
            );
     */
    public boolean GetVolumeInformation(
            String lpRootPathName,
            char[] lpVolumeNameBuffer,
            DWORD nVolumeNameSize,
            IntByReference lpVolumeSerialNumber,
            IntByReference lpMaximumComponentLength,
            IntByReference lpFileSystemFlags,
            char[] lpFileSystemNameBuffer,
            DWORD nFileSystemNameSize
            );

    public int GetLastError();
}

VolumeInformation.java:

package filesystem;

import ping.Kernel32;

import com.sun.jna.platform.win32.WinDef.DWORD;
import com.sun.jna.ptr.IntByReference;

public class VolumeInformation {

    static void getFileSystemName(){
        char[] lpVolumeNameBuffer = new char[256];
        DWORD nVolumeNameSize = new DWORD(256);
        IntByReference lpVolumeSerialNumber = new IntByReference();
        IntByReference lpMaximumComponentLength = new IntByReference();
        IntByReference lpFileSystemFlags = new IntByReference();

        char[] lpFileSystemNameBuffer = new char[256];
        DWORD nFileSystemNameSize = new DWORD(256);

        lpVolumeSerialNumber.setValue(0);
        lpMaximumComponentLength.setValue(256);
        lpFileSystemFlags.setValue(0);

        Kernel32.INSTANCE.GetVolumeInformation(
                "C:\\", 
                lpVolumeNameBuffer, 
                nVolumeNameSize, 
                lpVolumeSerialNumber, 
                lpMaximumComponentLength, 
                lpFileSystemFlags, 
                lpFileSystemNameBuffer, 
                nFileSystemNameSize);

        System.out.println("Last error: "+Kernel32.INSTANCE.GetLastError()+"\n\n");

        String fs = new String(lpFileSystemNameBuffer);
        System.out.println(fs.trim());

    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        getFileSystemName();
    }

}