CRC16Util
package com.sunwei.sim4xian;
import sun.misc.CRC16;
public class Crc16Util {
private static final byte[] hex = "0123456789ABCDEF".getBytes();
public static int getCRC16(byte[] data) {
int CRCTABLE[] = { 0xF078, 0xE1F1, 0xD36A, 0xC2E3, 0xB65C, 0xA7D5,
0x954E, 0x84C7, 0x7C30, 0x6DB9, 0x5F22, 0x4EAB, 0x3A14, 0x2B9D,
0x1906, 0x088F, 0xE0F9, 0xF170, 0xC3EB, 0xD262, 0xA6DD, 0xB754,
0x85CF, 0x9446, 0x6CB1, 0x7D38, 0x4FA3, 0x5E2A, 0x2A95, 0x3B1C,
0x0987, 0x180E, 0xD17A, 0xC0F3, 0xF268, 0xE3E1, 0x975E, 0x86D7,
0xB44C, 0xA5C5, 0x5D32, 0x4CBB, 0x7E20, 0x6FA9, 0x1B16, 0x0A9F,
0x3804, 0x298D, 0xC1FB, 0xD072, 0xE2E9, 0xF360, 0x87DF, 0x9656,
0xA4CD, 0xB544, 0x4DB3, 0x5C3A, 0x6EA1, 0x7F28, 0x0B97, 0x1A1E,
0x2885, 0x390C, 0xB27C, 0xA3F5, 0x916E, 0x80E7, 0xF458, 0xE5D1,
0xD74A, 0xC6C3, 0x3E34, 0x2FBD, 0x1D26, 0x0CAF, 0x7810, 0x6999,
0x5B02, 0x4A8B, 0xA2FD, 0xB374, 0x81EF, 0x9066, 0xE4D9, 0xF550,
0xC7CB, 0xD642, 0x2EB5, 0x3F3C, 0x0DA7, 0x1C2E, 0x6891, 0x7918,
0x4B83, 0x5A0A, 0x937E, 0x82F7, 0xB06C, 0xA1E5, 0xD55A, 0xC4D3,
0xF648, 0xE7C1, 0x1F36, 0x0EBF, 0x3C24, 0x2DAD, 0x5912, 0x489B,
0x7A00, 0x6B89, 0x83FF, 0x9276, 0xA0ED, 0xB164, 0xC5DB, 0xD452,
0xE6C9, 0xF740, 0x0FB7, 0x1E3E, 0x2CA5, 0x3D2C, 0x4993, 0x581A,
0x6A81, 0x7B08, 0x7470, 0x65F9, 0x5762, 0x46EB, 0x3254, 0x23DD,
0x1146, 0x00CF, 0xF838, 0xE9B1, 0xDB2A, 0xCAA3, 0xBE1C, 0xAF95,
0x9D0E, 0x8C87, 0x64F1, 0x7578, 0x47E3, 0x566A, 0x22D5, 0x335C,
0x01C7, 0x104E, 0xE8B9, 0xF930, 0xCBAB, 0xDA22, 0xAE9D, 0xBF14,
0x8D8F, 0x9C06, 0x5572, 0x44FB, 0x7660, 0x67E9, 0x1356, 0x02DF,
0x3044, 0x21CD, 0xD93A, 0xC8B3, 0xFA28, 0xEBA1, 0x9F1E, 0x8E97,
0xBC0C, 0xAD85, 0x45F3, 0x547A, 0x66E1, 0x7768, 0x03D7, 0x125E,
0x20C5, 0x314C, 0xC9BB, 0xD832, 0xEAA9, 0xFB20, 0x8F9F, 0x9E16,
0xAC8D, 0xBD04, 0x3674, 0x27FD, 0x1566, 0x04EF, 0x7050, 0x61D9,
0x5342, 0x42CB, 0xBA3C, 0xABB5, 0x992E, 0x88A7, 0xFC18, 0xED91,
0xDF0A, 0xCE83, 0x26F5, 0x377C, 0x05E7, 0x146E, 0x60D1, 0x7158,
0x43C3, 0x524A, 0xAABD, 0xBB34, 0x89AF, 0x9826, 0xEC99, 0xFD10,
0xCF8B, 0xDE02, 0x1776, 0x06FF, 0x3464, 0x25ED, 0x5152, 0x40DB,
0x7240, 0x63C9, 0x9B3E, 0x8AB7, 0xB82C, 0xA9A5, 0xDD1A, 0xCC93,
0xFE08, 0xEF81, 0x07F7, 0x167E, 0x24E5, 0x356C, 0x41D3, 0x505A,
0x62C1, 0x7348, 0x8BBF, 0x9A36, 0xA8AD, 0xB924, 0xCD9B, 0xDC12,
0xEE89, 0xFF00 };
int CRCVal = 0;
int i = 0;
for (i = 0; i < data.length; i++) {
CRCVal = CRCTABLE[(CRCVal ^= ((data[i]) & 0xFF)) & 0xFF]
^ (CRCVal >> 8);
}
// return Integer.toHexString(CRCVal);
// return String.valueOf(CRCVal);
return CRCVal;
}
public static String crcTable(byte[] bytes) {
int[] table = { 0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280,
0xC241, 0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481,
0x0440, 0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81,
0x0E40, 0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880,
0xC841, 0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81,
0x1A40, 0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80,
0xDC41, 0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680,
0xD641, 0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081,
0x1040, 0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281,
0x3240, 0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480,
0xF441, 0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80,
0xFE41, 0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881,
0x3840, 0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80,
0xEA41, 0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81,
0x2C40, 0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681,
0x2640, 0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080,
0xE041, 0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281,
0x6240, 0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480,
0xA441, 0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80,
0xAE41, 0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881,
0x6840, 0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80,
0xBA41, 0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81,
0x7C40, 0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681,
0x7640, 0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080,
0xB041, 0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280,
0x9241, 0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481,
0x5440, 0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81,
0x5E40, 0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880,
0x9841, 0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81,
0x4A40, 0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80,
0x8C41, 0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680,
0x8641, 0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081,
0x4040, };
int crc = 0x0000;
for (byte b : bytes) {
crc = (crc >>> 8) ^ table[(crc ^ b) & 0xff];
}
return Integer.toHexString(crc);
}
public static String mkCrc16(byte[] b) {
CRC16 crc16 = new CRC16();
for (int i = 0; i < b.length; i++) {
crc16.update(b[i]);
}
return Integer.toHexString(crc16.value);
}
public static final String evalCRC16(byte[] data) {
int crc = 0xFFFF;
for (int i = 0; i < data.length; i++) {
crc = (data[i] << 8) ^ crc;
for (int j = 0; j < 8; ++j) {
if ((crc & 0x8000) != 0)
crc = (crc << 1) ^ 0x1021;
else
crc <<= 1;
}
}
return Integer.toHexString((crc ^ 0xFFFF) & 0xFFFF);
}
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;
}
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[] test = Crc16Util.HexString2Bytes("0200fb000130");
byte[] test = {(byte)0x21, (byte)0x02, (byte)0x64,
(byte)0x80, (byte)0x00, (byte)0x00,
(byte)0x80, (byte)0x00, (byte)0x9c, (byte)0x47,
(byte)0x00, (byte)0x37,
(byte)0x00, (byte)0x00,
(byte)0x0C,
(byte)0x31,
(byte)0x30, (byte)0x30, (byte)0x34, (byte)0x30, (byte)0x30,
(byte)0x39, (byte)0x39, (byte)0x71,
(byte)0x30, (byte)0x30, (byte)0x34, (byte)0x33, (byte)0x30, (byte)0x30, (byte)0x30, (byte)0x31,
(byte)0x33,
(byte)0x30, (byte)0x39, (byte)0x34, (byte)0x39, (byte)0x32, (byte)0x39,
(byte)0x33, (byte)0x34, (byte)0x31, (byte)0x35, (byte)0x35, (byte)0x39,
(byte)0x4E,
(byte)0x31, (byte)0x30, (byte)0x39, (byte)0x30, (byte)0x30, (byte)0x30, (byte)0x30,
(byte)0x45,
(byte)0x00
};
System.out.println(Crc16Util.mkCrc16(test));
System.out.println(Crc16Util.evalCRC16(test));
System.out.println(Crc16Util.crcTable(test));
System.out.println(Crc16Util.getCRC16(test));
}
}
