Windows系统时间(FILETIME和SYSTEMTIME)

先来看看这两个结构体的定义:

1.     FILETIME
//By MoreWindows-(http://blog.csdn.net/MoreWindows)
typedef struct _FILETIME {
    DWORDdwLowDateTime;
    DWORDdwHighDateTime;
} FILETIME, *PFILETIME, *LPFILETIME;
它在MSDN上的说明——Contains a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601 (UTC时间).

2.     SYSTEMTIME
//By MoreWindows-(http://blog.csdn.net/MoreWindows)
typedef struct _SYSTEMTIME {
    WORD wYear;
    WORD wMonth;
    WORD wDayOfWeek;
    WORD wDay;
    WORD wHour;
    WORD wMinute;
    WORD wSecond;
    WORD wMilliseconds;
} SYSTEMTIME, *PSYSTEMTIME, *LPSYSTEMTIME;
这个就不用解释了,和大家平常表示时间的方法一样,都是日期(年-月-日)加时间(小时:分钟:秒)
与这两个结构体相关的函数主有6个——GetSystemTime、GetLocalTime、SystemTimeToFileTime、FileTimeToSystemTime、LocalFileTimeToFileTime、FileTimeToLocalFileTime。下面来看看这些函数的用法:

一、得到当前UTC时间
//By MoreWindows-(http://blog.csdn.net/MoreWindows)
void GetSystemTime(LPSYSTEMTIMElpSystemTime);

二、得到当地时间
void GetLocalTime(LPSYSTEMTIMElpSystemTime);

三、SYSTEMTIME转成FILETIME
//By MoreWindows-(http://blog.csdn.net/MoreWindows)
BOOLSystemTimeToFileTime(
    const SYSTEMTIME* lpSystemTime,
    LPFILETIMElpFileTime

);

四.FILETIME转成SYSTEMTIME
BOOLFileTimeToSystemTime(
    const FILETIME* lpFileTime,
    LPSYSTEMTIMElpSystemTime
);

五.当地时间转成UTC时间
//By MoreWindows-(http://blog.csdn.net/MoreWindows)
BOOLLocalFileTimeToFileTime(
    const FILETIME* lpLocalFileTime,
    LPFILETIMElpFileTime
);

六.UTC时间转成当地时间
BOOLFileTimeToLocalFileTime(
       const FILETIME* lpFileTime,
       LPFILETIMElpLocalFileTime
);


下面再给出一个示例,这个示例主要使用两个功能:
1、对获取当前当地系统时间
2、打开一个文件,并将文件的创建时间,修改时间,访问时间从FILETIME类型转成SYSTEMTIME类型。

完整代码如下:

    // Windows系统时间(FILETIME和SYSTEMTIME)     
    //By MoreWindows-(http://blog.csdn.net/morewindows/article/details/8654298)    
    #include <windows.h>  
    #include <stdio.h>  
    #include <conio.h>  
      
    class CWindowsDateAndTime  
    {  
    public:  
        static void GetCurrentLocalSystemTime(char *pstrDate, char *pstrTime);  
        static void FileTimeToLocalSystemTime(FILETIME &ft, char *pstrDate, char *pstrTime);  
    };  
      
    //得到当前当地时间  
    void CWindowsDateAndTime::GetCurrentLocalSystemTime(char *pstrDate, char *pstrTime)  
    {  
        SYSTEMTIME st;  
        GetLocalTime(&st);  
      
        if (pstrDate != NULL)  
            sprintf(pstrDate, "%d-%d-%d", st.wYear, st.wMonth, st.wDay);  
        if (pstrTime != NULL)  
            sprintf(pstrTime, "%02d:%02d:%02d", st.wHour, st.wMinute, st.wSecond);  
    }  
      
    //文件时间转成当地时间  
    void CWindowsDateAndTime::FileTimeToLocalSystemTime(FILETIME &ft, char *pstrDate, char *pstrTime)  
    {  
        FILETIME localft;  
        FileTimeToLocalFileTime(&ft, &localft);  
        SYSTEMTIME st;  
        FileTimeToSystemTime(&localft, &st);  
      
        if (pstrDate != NULL)  
            sprintf(pstrDate, "%d-%d-%d", st.wYear, st.wMonth, st.wDay);  
        if (pstrTime != NULL)  
            sprintf(pstrTime, "%02d:%02d:%02d", st.wHour, st.wMinute, st.wSecond);  
    }  
      
      
    int main(int argc, char *argv[])  
    {  
          
        printf("    Windows系统时间(FILETIME和SYSTEMTIME) \n");          
        printf(" -- By MoreWindows( http://blog.csdn.net/morewindows/article/details/8654298 ) --\n\n");   
      
        const int MAX_LEN = 30;  
        char strDate[MAX_LEN], strTime[MAX_LEN];  
        CWindowsDateAndTime::GetCurrentLocalSystemTime(strDate, strTime);  
        printf("当前系统时间: %s %s\n", strDate, strTime);  
      
        const char* pstrFileName = "D:\\MoreWindows.txt";  
        printf("文件%s:\n", pstrFileName);  
        HANDLE handleFile = CreateFile(pstrFileName, GENERIC_READ,   
            FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);  
        FILETIME ftCreationTime, ftLastAccessTime, ftLastWriteTime;  
        GetFileTime(handleFile, &ftCreationTime, &ftLastAccessTime, &ftLastWriteTime);  
        CWindowsDateAndTime::FileTimeToLocalSystemTime(ftCreationTime, strDate, strTime);  
        printf("创建时间: %s %s\n", strDate, strTime);  
        CWindowsDateAndTime::FileTimeToLocalSystemTime(ftLastAccessTime, strDate, strTime);  
        printf("访问时间: %s %s\n", strDate, strTime);  
        CWindowsDateAndTime::FileTimeToLocalSystemTime(ftLastWriteTime, strDate, strTime);  
        printf("修改时间: %s %s\n", strDate, strTime);  
        getch();  
        return 0;  
    }  
程序运行结果如下:



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