long -> byte array
public static byte[] toByte(long data) { return new byte[] { (byte)((data >> 56) & 0xff), (byte)((data >> 48) & 0xff), (byte)((data >> 40) & 0xff), (byte)((data >> 32) & 0xff), (byte)((data >> 24) & 0xff), (byte)((data >> 16) & 0xff), (byte)((data >> 8) & 0xff), (byte)((data >> 0) & 0xff), }; }
long array -> byte array
public static byte[] toByte(long[] data) { if (data == null) return null; byte[] bytes = new byte[data.length * 8]; for (int i = 0; i < data.length; i++) System.arraycopy(toByte(data[i]), 0, bytes, i * 8, 8); return bytes; }
byte array -> long
public static long toLong(byte[] data) { if (data == null || data.length != 8) return 0×0; return (long)((long)(0xff & data[0]) << 56 | (long)(0xff & data[1]) << 48 | (long)(0xff & data[2]) << 40 | (long)(0xff & data[3]) << 32 | (long)(0xff & data[4]) << 24 | (long)(0xff & data[5]) << 16 | (long)(0xff & data[6]) << 8 | (long)(0xff & data[7]) << 0 ); }
잘보고 갑니다.
늘 웃음 가득 행복하세요 ^^*