16进制字符串生成CRC-16/CCITT-FALSE校验码

article/2025/10/31 3:17:20

/*** @author yichuan@iscas.ac.cn* @version 1.0* @date 2021/11/8 21:51*/
public class Crc {/*** CRC-16/CCITT-FALSE x16+x12+x5+1 算法** info* Name:CRC-16/CCITT-FAI* Width:16* Poly:0x1021* Init:0xFFFF* RefIn:False* RefOut:False* XorOut:0x0000** @param hexString* @param* @return*/public static String crc_16_CCITT_False(String hexString) {byte[] destByte = new byte[hexString.length()/2];int j=0;for(int i=0;i<destByte.length;i++) {byte high = (byte) (Character.digit(hexString.charAt(j), 16) & 0xff);byte low = (byte) (Character.digit(hexString.charAt(j + 1), 16) & 0xff);destByte[i] = (byte) (high << 4 | low);j+=2;}int crc = 0xffff; // initial valueint polynomial = 0x1021; // poly valuefor (int index = 0; index < destByte.length; index++) {byte b = destByte[index];for (int i = 0; i < 8; i++) {boolean bit = ((b >> (7 - i) & 1) == 1);boolean c15 = ((crc >> 15 & 1) == 1);crc <<= 1;if (c15 ^ bit)crc ^= polynomial;}}crc &= 0xffff;String strCrc = Integer.toHexString(crc).toUpperCase();return strCrc;}public static void main(String[] args) {String hexString = "043b35d468c4c534d4ea00000000008900000000000000000000edcd88962500007d000078d000f400c77c00ea000000c20001007700ba0277009a02000000000000ca1508b108ad0dad08af0dad08af08ae0fd90fe70d290a6c080808000800080808080bfd0bee0bef0f7b0f7207ff08010802080007ff08010eaf00000000000000003bab92c00a3b64c9433db2b8843c3ae4c28d3d0efdca1e3ae4c28d3d0efdca1e003c000a000c08080008080802030302020204b0390e042b0000000000000000";System.out.println(crc_16_CCITT_False(hexString));}
}