public class TypeConvert { public static String getString(byte[] src, int srcPos, int destPos, int length) { byte[] tmp = new byte[length]; System.arraycopy(src, srcPos, tmp, destPos, length); return (new String(tmp).trim()); } public static String byte2String(byte buf[], int offset) { int pos = offset; for (; offset < buf.length; offset++) if (buf[offset] == 0) break; if (offset > pos) offset--; else if (offset == pos) return ""; int len = (offset - pos) + 1; byte bb[] = new byte[len]; System.arraycopy(buf, pos, bb, 0, len); String str = new String(bb); return str; } public static int byte2int(byte b[]) { return b[3] & 0xff | (b[2] & 0xff) << 8 | (b[1] & 0xff) << 16 | (b[0] & 0xff) << 24; } public static int byte2int(byte b[], int offset) { return b[offset + 3] & 0xff | (b[offset + 2] & 0xff) << 8 | (b[offset + 1] & 0xff) << 16 | (b[offset] & 0xff) << 24; } public static long byte2long(byte b[], int offset) { return (long) b[offset + 7] & 255L | ((long) b[offset + 6] & 255L) << 8 | ((long) b[offset + 5] & 255L) << 16 | ((long) b[offset + 4] & 255L) << 24 | ((long) b[offset + 3] & 255L) << 32 | ((long) b[offset + 2] & 255L) << 40 | ((long) b[offset + 1] & 255L) << 48 | (long) b[offset] << 56; } public static long byte2long(byte b[]) { return (long) b[7] & 255L | ((long) b[6] & 255L) << 8 | ((long) b[5] & 255L) << 16 | ((long) b[4] & 255L) << 24 | ((long) b[3] & 255L) << 32 | ((long) b[2] & 255L) << 40 | ((long) b[1] & 255L) << 48 | (long) b[0] << 56; } public static short byte2short(byte b[], int offset) { return (short) (b[offset + 1] & 0xff | (b[offset] & 0xff) << 8); } public static short byte2short(byte b[]) { return (short) (b[1] & 0xff | (b[0] & 0xff) << 8); } public static short byte2tinyint(byte b[], int offset) { return (short) (b[offset] & 0xff); } public static void int2byte(int n, byte buf[], int offset) { buf[offset] = (byte) (n >> 24); buf[offset + 1] = (byte) (n >> 16); buf[offset + 2] = (byte) (n >> 8); buf[offset + 3] = (byte) n; } public static void int2byte2(int n, byte buf[], int offset) { buf[offset] = (byte) (n >> 8); buf[offset + 1] = (byte) n; } public static void int2byte3(int n, byte buf[], int offset) { // buf[offset] = (byte)(n >> 8); buf[offset] = (byte) n; } public static byte[] int2byte(int n) { byte b[] = new byte[4]; b[0] = (byte) (n >> 24); b[1] = (byte) (n >> 16); b[2] = (byte) (n >> 8); b[3] = (byte) n; return b; } public static void long2byte(long n, byte buf[], int offset) { buf[offset] = (byte) (int) (n >> 56); buf[offset + 1] = (byte) (int) (n >> 48); buf[offset + 2] = (byte) (int) (n >> 40); buf[offset + 3] = (byte) (int) (n >> 32); buf[offset + 4] = (byte) (int) (n >> 24); buf[offset + 5] = (byte) (int) (n >> 16); buf[offset + 6] = (byte) (int) (n >> 8); buf[offset + 7] = (byte) (int) n; } public static byte[] long2byte(long n) { byte b[] = new byte[8]; b[0] = (byte) (int) (n >> 56); b[1] = (byte) (int) (n >> 48); b[2] = (byte) (int) (n >> 40); b[3] = (byte) (int) (n >> 32); b[4] = (byte) (int) (n >> 24); b[5] = (byte) (int) (n >> 16); b[6] = (byte) (int) (n >> 8); b[7] = (byte) (int) n; return b; } public static void short2byte(int n, byte buf[], int offset) { buf[offset] = (byte) (n >> 8); buf[offset + 1] = (byte) n; } public static byte[] short2byte(int n) { byte b[] = new byte[2]; b[0] = (byte) (n >> 8); b[1] = (byte) n; return b; } }
