在Windows中使用Java获取唯一的文件ID？

Question

我正在寻找一种在Java应用程序中获取唯一文件ID的方法，并且遇到了这种情况：

Windows中的唯一文件标识符

现在，我尝试了Ashley
Henderson本人（提出问题的人）提供的答案，并且在C＃中效果很好。但是我需要在Java中执行此操作，以使该应用程序可以跨平台工作。

有什么方法可以将此移植到Java或以其他方式获取相同的ID？

编辑：

我现在几乎可以使用eee的解决方案来使它正常工作，只是我需要将其放在库中，并且当我将其编译为库时，即使在包含所有内容的测试应用程序中一切正常，也遇到了错误。但是，当我尝试导入一个单独的库（没有编译器错误）时，出现了此运行时错误：

debug:
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/jna/Structure
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at winfileid.FileId.getFileId(FileId.java:37)
    at testfileid.TestFileId.main(TestFileId.java:19)
Caused by: java.lang.ClassNotFoundException: com.sun.jna.Structure
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    ... 14 more
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)

编译时，我已经在库中包含了jna.jar和platform.jar …请再次注意，我对Java还是很陌生，但是我在做什么错呢？

Answer 1

使用JNA版本3.3.0：

Kernel32.INSTANCE.GetFileInformationByHandle测试用例：

package win.test;

import com.sun.jna.platform.win32.Kernel32;
import com.sun.jna.platform.win32.WinBase;
import com.sun.jna.platform.win32.WinBase.FILETIME;
import com.sun.jna.platform.win32.WinNT.HANDLE;

import win.test.Kernel32.BY_HANDLE_FILE_INFORMATION;


public class FileTest {

    /**
     * @param args
     */
    public static void main(String[] args) {
        //http://msdn.microsoft.com/en-us/library/windows/desktop/aa363858%28v=vs.85%29.aspx
        final int FILE_SHARE_READ = (0x00000001);
        //final int FILE_SHARE_WRITE = (0x00000002);
        //final int FILE_SHARE_DELETE = (0x00000004);
        final int OPEN_EXISTING = (3);
        final int GENERIC_READ = (0x80000000);
        //final int GENERIC_WRITE = (0x40000000);
        //final int FILE_FLAG_NO_BUFFERING = (0x20000000);
        //final int FILE_FLAG_WRITE_THROUGH = (0x80000000);
        //final int FILE_READ_ATTRIBUTES = (0x0080);
        //final int FILE_WRITE_ATTRIBUTES = (0x0100);
        //final int ERROR_INSUFFICIENT_BUFFER = (122);
        final int FILE_ATTRIBUTE_ARCHIVE = (0x20);

        WinBase.SECURITY_ATTRIBUTES attr = null;
        BY_HANDLE_FILE_INFORMATION lpFileInformation = new BY_HANDLE_FILE_INFORMATION();
        HANDLE hFile = null;

        hFile = Kernel32.INSTANCE.CreateFile(args[0], GENERIC_READ, FILE_SHARE_READ, attr, OPEN_EXISTING, FILE_ATTRIBUTE_ARCHIVE, null);

        System.out.println("CreateFile last error:" + Kernel32.INSTANCE.GetLastError());

        //if (hFile. != -1)
        {

            win.test.Kernel32.INSTANCE.GetFileInformationByHandle(hFile, lpFileInformation);

            System.out.println("CREATION TIME: " + FILETIME.filetimeToDate(lpFileInformation.ftCreationTime.dwHighDateTime, lpFileInformation.ftCreationTime.dwLowDateTime));

            System.out.println("VOLUME SERIAL NO.: "  + Integer.toHexString(lpFileInformation.dwVolumeSerialNumber.intValue()));

            System.out.println("FILE INDEX HIGH: "  + lpFileInformation.nFileIndexHigh);
            System.out.println("FILE INDEX LOW: "  + lpFileInformation.nFileIndexLow);


            System.out.println("GetFileInformationByHandle last error:" + Kernel32.INSTANCE.GetLastError());
        }

        Kernel32.INSTANCE.CloseHandle(hFile);

        System.out.println("CloseHandle last error:" + Kernel32.INSTANCE.GetLastError());

    }

}

样本输出：

CreateFile last error:0
CREATION TIME: Tue Nov 29 22:24:04 SGT 2011
VOLUME SERIAL NO.: 900c0655
FILE INDEX HIGH: 1769472
FILE INDEX LOW: 286306
GetFileInformationByHandle last error:0
CloseHandle last error:0

Kernel32 JNA实例类：

package win.test;

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

import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.WString;
import com.sun.jna.platform.win32.WinBase.FILETIME;
import com.sun.jna.platform.win32.WinDef.DWORD;
import com.sun.jna.platform.win32.WinNT.HANDLE;
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);

    public int GetLastError();

    /**
    typedef struct _BY_HANDLE_FILE_INFORMATION {
          DWORD    dwFileAttributes;
          FILETIME ftCreationTime;
          FILETIME ftLastAccessTime;
          FILETIME ftLastWriteTime;
          DWORD    dwVolumeSerialNumber;
          DWORD    nFileSizeHigh;
          DWORD    nFileSizeLow;
          DWORD    nNumberOfLinks;
          DWORD    nFileIndexHigh;
          DWORD    nFileIndexLow;
        } BY_HANDLE_FILE_INFORMATION, *PBY_HANDLE_FILE_INFORMATION;
     */

    public class BY_HANDLE_FILE_INFORMATION extends Structure {
        public DWORD    dwFileAttributes;
        public FILETIME ftCreationTime;
        public FILETIME ftLastAccessTime;
        public FILETIME ftLastWriteTime;
        public DWORD    dwVolumeSerialNumber;
        public DWORD    nFileSizeHigh;
        public DWORD    nFileSizeLow;
        public DWORD    nNumberOfLinks;
        public DWORD    nFileIndexHigh;
        public DWORD    nFileIndexLow;
        public static class ByReference extends BY_HANDLE_FILE_INFORMATION implements Structure.ByReference {

        };
        public static class ByValue extends BY_HANDLE_FILE_INFORMATION implements Structure.ByValue {

        };        
    };

    /**
    BOOL WINAPI GetFileInformationByHandle(
              __in   HANDLE hFile,
              __out  LPBY_HANDLE_FILE_INFORMATION lpFileInformation
            );
    */
    boolean GetFileInformationByHandle(
              HANDLE hFile,
              BY_HANDLE_FILE_INFORMATION lpFileInformation
            );
}