public String getCRC16(byte[] bytes) { //CRC寄存器全为1 int CRC = 0x0000ffff; //多项式校验值 int POLYNOMIAL = 0x0000a001; int i, j; for (i = 0; i < bytes.length; i++) { CRC ^= ((int) bytes[i] & 0x000000ff); for (j = 0; j < 8; j++) { if ((CRC & 0x00000001) != 0) { CRC >>= 1; CRC ^= POLYNOMIAL; } else { CRC >>= 1; } } } //结果转换为16进制 String result = Integer.toHexString(CRC).toUpperCase(); if (result.length() != 4) { StringBuffer sb = new StringBuffer("0000"); result = sb.replace(4 - result.length(), 4, result).toString(); } //交换高低位 //return result.substring(2, 4) + result.substring(0, 2);//低前高后 return result;//高位在前，低位在后 }
转载于:https://www.cnblogs.com/jing5464/p/10172428.html