byte数组 和 16进制进制见的转换

private final static byte[] hex = "0123456789ABCDEF".getBytes();

private static int parse(char c) {
	if (c >= "a")
		return (c - "a" + 10) & 0x0f;
	if (c >= "A")
		return (c - "A" + 10) & 0x0f;
	return (c - "0") & 0x0f;
}
// 从字节数组到十六进制字符串转换
public static String Bytes2HexString(byte[] b) {
	byte[] buff = new byte[2 * b.length];
	for (int i = 0; i < b.length; i++) {
		buff[2 * i] = hex[(b[i] >> 4) & 0x0f];
		buff[2 * i + 1] = hex[b[i] & 0x0f];
	}
	return new String(buff);
}

// 从十六进制字符串到字节数组转换
public static byte[] HexString2Bytes(String hexstr) {
	byte[] b = new byte[hexstr.length() / 2];
	int j = 0;
	for (int i = 0; i < b.length; i++) {
		char c0 = hexstr.charAt(j++);
		char c1 = hexstr.charAt(j++);
		b[i] = (byte) ((parse(c0) << 4) | parse(c1));
	}
	return b;
}

public static void main(String[] args) {
	byte[] bt = new byte[]{10, 2, 12, 14, 1, 0, 0, 1, 0, 31, 45, 1, 8, 0, 1, 0, -96, -45, 10, 3};
	System.out.println(Bytes2HexString(bt));
	System.out.println(Arrays.toString(HexString2Bytes("0A020C0E01000001001F2D0108000100A0D30A03")));
}