java实现CRC16校验功能

/** * 字符、字节转换器 * * @author Administrator * */ public class CharterConverter { /* * Convert byte[] to hex * * @param src byte[] data * * @return hex string */ 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 hv = Integer.toHexString(v); if (hv.length() < 2) { stringBuilder.append(0); } stringBuilder.append(hv); } return stringBuilder.toString(); } /** * Convert hex string to byte[] * * @param hexString * the hex string * @return byte[] */ public static byte[] hexStringToBytes(String hexString) { if (hexString == null || hexString.equals("")) { return null; } hexString = hexString.toUpperCase(); int length = hexString.length() / 2; char[] hexChars = hexString.toCharArray(); byte[] d = new byte[length]; for (int i = 0; i < length; i++) { int pos = i * 2; d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1])); } return d; } /** * Convert char to byte * * @param c * char * @return byte */ private static byte charToByte(char c) { return (byte) "0123456789ABCDEF".indexOf(c); } /** * 将指定byte数组以16进制的形式打印到控制台 * @param b */ public static void printHexString(byte[] b) { for (int i = 0; i < b.length; i++) { String hex = Integer.toHexString(b[i] & 0xFF); if (hex.length() == 1) { hex = '0' + hex; } System.out.print(hex.toUpperCase()); } } public static void main(String[] args) { String hexString = "FF1132969442254770140F0020012620000000630063210B0B170C00000302001214"; byte[] bs = hexStringToBytes(hexString); System.out.println("xxxxxxx"); } }