Java十六进制字符串转字节数组

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十六进制字符转字节数组：

/*** 16进制字符串转换成字节数组* * @param hex* @return*/public static byte[] hexStringToByte(String hex) {byte[] b = new byte[hex.length() / 2];int j = 0;for (int i = 0; i < b.length; i++) {char c0 = hex.charAt(j++);char c1 = hex.charAt(j++);b[i] = (byte) ((parse(c0) << 4) | parse(c1));}return b;}

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;}

字节数组转十六进制字符：

/*** 字节数组转16进制字符串* @param src* @return*/public static String bytesToHexString(byte[] src) {StringBuilder stringBuilder = new StringBuilder("");if (src == null || src.length <= 0) {return null;}for (int i = 0; i < src.length; i++) {int v = src[i] & 0xFF;String hex = Integer.toHexString(v);if (hex.length() < 2) {stringBuilder.append(0);}stringBuilder.append(hex);}return stringBuilder.toString();}

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