71     /**
  72      * The upper bound of the 32-bit unix time, the "year 2038 problem".
  73      */
  74     public static final long UPPER_UNIXTIME_BOUND = 0x7fffffff;
  75 
  76     /**
  77      * Converts "standard Unix time"(in seconds, UTC/GMT) to FileTime
  78      */
  79     public static final FileTime unixTimeToFileTime(long utime) {
  80         return FileTime.from(utime, TimeUnit.SECONDS);
  81     }
  82 
  83     /**
  84      * Converts FileTime to "standard Unix time".
  85      */
  86     public static final long fileTimeToUnixTime(FileTime ftime) {
  87         return ftime.to(TimeUnit.SECONDS);
  88     }
  89 
  90     /**
  91      /*
  92      * Converts DOS time to Java time (number of milliseconds since epoch).
  93      */
  94     public static long dosToJavaTime(long dtime) {
  95         int year = (int) (((dtime >> 25) & 0x7f) + 1980);
  96         int month = (int) ((dtime >> 21) & 0x0f);
  97         int day = (int) ((dtime >> 16) & 0x1f);
  98         int hour = (int) ((dtime >> 11) & 0x1f);
  99         int minute = (int) ((dtime >> 5) & 0x3f);
 100         int second = (int) ((dtime << 1) & 0x3e);
 101 
 102         if (month > 0 && month < 13 && day > 0 && hour < 24 && minute < 60 && second < 60) {
 103             try {
 104                 LocalDateTime ldt = LocalDateTime.of(year, month, day, hour, minute, second);
 105                 return TimeUnit.MILLISECONDS.convert(ldt.toEpochSecond(
 106                         ZoneId.systemDefault().getRules().getOffset(ldt)), TimeUnit.SECONDS);
 107             } catch (DateTimeException dte) {
 108                 // ignore
 109             }
 110         }
 111         return overflowDosToJavaTime(year, month, day, hour, minute, second);

  71     /**
  72      * The upper bound of the 32-bit unix time, the "year 2038 problem".
  73      */
  74     public static final long UPPER_UNIXTIME_BOUND = 0x7fffffff;
  75 
  76     /**
  77      * Converts "standard Unix time"(in seconds, UTC/GMT) to FileTime
  78      */
  79     public static final FileTime unixTimeToFileTime(long utime) {
  80         return FileTime.from(utime, TimeUnit.SECONDS);
  81     }
  82 
  83     /**
  84      * Converts FileTime to "standard Unix time".
  85      */
  86     public static final long fileTimeToUnixTime(FileTime ftime) {
  87         return ftime.to(TimeUnit.SECONDS);
  88     }
  89 
  90     /**

  91      * Converts DOS time to Java time (number of milliseconds since epoch).
  92      */
  93     public static long dosToJavaTime(long dtime) {
  94         int year = (int) (((dtime >> 25) & 0x7f) + 1980);
  95         int month = (int) ((dtime >> 21) & 0x0f);
  96         int day = (int) ((dtime >> 16) & 0x1f);
  97         int hour = (int) ((dtime >> 11) & 0x1f);
  98         int minute = (int) ((dtime >> 5) & 0x3f);
  99         int second = (int) ((dtime << 1) & 0x3e);
 100 
 101         if (month > 0 && month < 13 && day > 0 && hour < 24 && minute < 60 && second < 60) {
 102             try {
 103                 LocalDateTime ldt = LocalDateTime.of(year, month, day, hour, minute, second);
 104                 return TimeUnit.MILLISECONDS.convert(ldt.toEpochSecond(
 105                         ZoneId.systemDefault().getRules().getOffset(ldt)), TimeUnit.SECONDS);
 106             } catch (DateTimeException dte) {
 107                 // ignore
 108             }
 109         }
 110         return overflowDosToJavaTime(year, month, day, hour, minute, second);