在Windows中使用Java获取唯一的文件ID？
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？
回答：
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:0CREATION 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
);
}
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