#include <jni.h>
/* Header for class MyFileTime */

#ifndef _Included_MyFileTime
#define _Included_MyFileTime
#ifdef __cplusplus
extern "C" {
#endif
/*
 * Class:     MyFileTime
 * Method:    getFileCreationTime
 * Signature: (Ljava/lang/String;)Ljava/lang/String;
 */
JNIEXPORT jstring JNICALL Java_cn_imu_jni_MyFileTimegetFileCreationTime
  (JNIEnv *, jobject, jstring);

#ifdef __cplusplus
}
#endif
#endif

#include <windows.h>
#include "MyFileTime.h"

JNIEXPORT jstring JNICALL Java_cn_imu_jni_MyFileTime_getFileCreationTime(JNIEnv *env, jobject cls, jstring FileName)
{
    HANDLE hFile;
    FILETIME creationTime;
    FILETIME lastAccessTime;
    FILETIME lastWriteTime;
    FILETIME creationLocalTime;
    SYSTEMTIME creationSystemTime;
    jstring result;
    char fileTimeString[30];
    
    hFile = CreateFile((char *)env->GetStringUTFChars(FileName, 0), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
    if(hFile == INVALID_HANDLE_VALUE) return env->NewStringUTF("");
    if(GetFileTime(hFile, &creationTime, &lastAccessTime, &lastWriteTime))
    {
        if(FileTimeToLocalFileTime(&creationTime, &creationLocalTime))
        {
            if(FileTimeToSystemTime(&creationLocalTime, &creationSystemTime))
            {
                sprintf(fileTimeString, 
                    "%04d-%02d-%02d %02d:%02d:%02d\0", 
                        creationSystemTime.wYear, 
                        creationSystemTime.wMonth, 
                        creationSystemTime.wDay, 
                        creationSystemTime.wHour, 
                        creationSystemTime.wMinute, 
                        creationSystemTime.wSecond);
                result = env->NewStringUTF(fileTimeString);
            }
            else
                result = env->NewStringUTF("");
        }
        else
            result = env->NewStringUTF("");
    }
    else
        result = env->NewStringUTF("");
    CloseHandle(hFile);
    return result;
}

package cn.imu.jni;

public final class MyFileTime {
	/**
	 * @param args
	 */
	static {
        System.loadLibrary("MyFileTime");
    }
    private static native String getFileCreationTime(String fileName);
    public static String getCreationTime(String fileName) {
        return getFileCreationTime(fileName);
    }
    public static void main(String[] args) {
        System.out.println(MyFileTime.getCreationTime("c:/db.txt"));
    }
}