Java 对指定字节数组进行CRC8校验处理

public class CRC8Util {

public static int[] crc8_tab = {0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12,
        0x15, 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D, 0x70, 0x77,
        0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65, 0x48, 0x4F, 0x46, 0x41, 0x54,
        0x53, 0x5A, 0x5D, 0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
        0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD, 0x90, 0x97, 0x9E,
        0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3,
        0xBA, 0xBD, 0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, 0xFF,
        0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA, 0xB7, 0xB0, 0xB9, 0xBE,
        0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D,
        0x9A, 0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18,
        0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A, 0x57, 0x50, 0x59, 0x5E, 0x4B,
        0x4C, 0x45, 0x42, 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
        0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF,
        0xB8, 0xAD, 0xAA, 0xA3, 0xA4, 0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2,
        0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4, 0x69,
        0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5F, 0x58,
        0x4D, 0x4A, 0x43, 0x44, 0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B,
        0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34, 0x4E, 0x49,
        0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, 0x76, 0x71, 0x78, 0x7F, 0x6A,
        0x6D, 0x64, 0x63, 0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
        0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13, 0xAE, 0xA9, 0xA0,
        0xA7, 0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D,
        0x84, 0x83, 0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6,
        0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3};

/**

• 计算数组的CRC8校验值
• @param data 需要计算的数组
• @return CRC8校验值
  /***

public static byte calcCrc8(byte[] data) {
    return calcCrc8(data, 0, data.length - 1);
}

/**

• 计算给定数组的crc值
• @param data
• @param startIndex 数组开始位置
• @param endIndex，数组结束位置
• @return
  */

  public static byte calcCrc8(byte[] data, int startIndex, int endIndex) {
        int i = 0;
        byte fcs = 0x00;
        // 计算数据校验
        for (i = startIndex; i <= endIndex; i++) {
            byte index = (byte) (fcs ^ data[i]);
            fcs = (byte) crc8_tab[0xFF & index];
        }
        return fcs;
    }

//测试 CRC8 校验

 public static void main(String[] args) {
        byte crc8 = CRC8Util.calcCrc8(new byte[]{(byte) 1, (byte) 2});
        byte[] bytes = {(byte) 0x88};
        byte ret = CRC8Util.calcCrc8(bytes, 0, 0);
        System.out.println("" + Integer.toHexString(0xff & ret));
    }

}

本文地址：https://blog.csdn.net/weixin_44005694/article/details/107672409