Java 实现CRC-8 MAXIM 数据校验

简介

CRC即循环冗余校验码：是数据通信领域中最常用的一种查错校验码，其特征是信息字段和校验字段的长度可以任意选定。

CRC校验原理：在要发送的帧后面附加一个数，生成一个新帧发送给接收端。它要使所生成的新帧能与发送端和接收端共同选定的某个特定数整除（注意，这里是采用“模2除法”）。模2除法：实际上就是异或，下面是一个Java 代码写的CRC-8MAXIM校验。

java 实现 CRC-8MAXIM数据校验

public class Crc8 {
    
    
    private static final int[] CRC_TABLE = {
    
    
            0x00, 0x5E, 0xBC, 0xE2, 0x61, 0x3F, 0xDD, 0x83, 0xC2, 0x9C, 0x7E, 0x20, 0xA3, 0xFD, 0x1F, 0x41,
            0x9D, 0xC3, 0x21, 0x7F, 0xFC, 0xA2, 0x40, 0x1E, 0x5F, 0x01, 0xE3, 0xBD, 0x3E, 0x60, 0x82, 0xDC,
            0x23, 0x7D, 0x9F, 0xC1, 0x42, 0x1C, 0xFE, 0xA0, 0xE1, 0xBF, 0x5D, 0x03, 0x80, 0xDE, 0x3C, 0x62,
            0xBE, 0xE0, 0x02, 0x5C, 0xDF, 0x81, 0x63, 0x3D, 0x7C, 0x22, 0xC0, 0x9E, 0x1D, 0x43, 0xA1, 0xFF,
            0x46, 0x18, 0xFA, 0xA4, 0x27, 0x79, 0x9B, 0xC5, 0x84, 0xDA, 0x38, 0x66, 0xE5, 0xBB, 0x59, 0x07,
            0xDB, 0x85, 0x67, 0x39, 0xBA, 0xE4, 0x06, 0x58, 0x19, 0x47, 0xA5, 0xFB, 0x78, 0x26, 0xC4, 0x9A,
            0x65, 0x3B, 0xD9, 0x87, 0x04, 0x5A, 0xB8, 0xE6, 0xA7, 0xF9, 0x1B, 0x45, 0xC6, 0x98, 0x7A, 0x24,
            0xF8, 0xA6, 0x44, 0x1A, 0x99, 0xC7, 0x25, 0x7B, 0x3A, 0x64, 0x86, 0xD8, 0x5B, 0x05, 0xE7, 0xB9,
            0x8C, 0xD2, 0x30, 0x6E, 0xED, 0xB3, 0x51, 0x0F, 0x4E, 0x10, 0xF2, 0xAC, 0x2F, 0x71, 0x93, 0xCD,
            0x11, 0x4F, 0xAD, 0xF3, 0x70, 0x2E, 0xCC, 0x92, 0xD3, 0x8D, 0x6F, 0x31, 0xB2, 0xEC, 0x0E, 0x50,
            0xAF, 0xF1, 0x13, 0x4D, 0xCE, 0x90, 0x72, 0x2C, 0x6D, 0x33, 0xD1, 0x8F, 0x0C, 0x52, 0xB0, 0xEE,
            0x32, 0x6C, 0x8E, 0xD0, 0x53, 0x0D, 0xEF, 0xB1, 0xF0, 0xAE, 0x4C, 0x12, 0x91, 0xCF, 0x2D, 0x73,
            0xCA, 0x94, 0x76, 0x28, 0xAB, 0xF5, 0x17, 0x49, 0x08, 0x56, 0xB4, 0xEA, 0x69, 0x37, 0xD5, 0x8B,
            0x57, 0x09, 0xEB, 0xB5, 0x36, 0x68, 0x8A, 0xD4, 0x95, 0xCB, 0x29, 0x77, 0xF4, 0xAA, 0x48, 0x16,
            0xE9, 0xB7, 0x55, 0x0B, 0x88, 0xD6, 0x34, 0x6A, 0x2B, 0x75, 0x97, 0xC9, 0x4A, 0x14, 0xF6, 0xA8,
            0x74, 0x2A, 0xC8, 0x96, 0x15, 0x4B, 0xA9, 0xF7, 0xB6, 0xE8, 0x0A, 0x54, 0xD7, 0x89, 0x6B, 0x35
    };
/*byte数据传入校验*/
    public static int crc8(byte[] data) {
    
    
        int crc = 0x00;
        for (byte b : data) {
    
    
            crc = CRC_TABLE[(crc ^ b) & 0xFF];
        }
        return crc;
    }


  //将16进制字符串转为byte[]
    public static byte[] hexStringToByteArray(String s) {
    
    
        int len = s.length();
        byte[] data = new byte[len / 2];
        for (int i = 0; i < len; i += 2) {
    
    
            data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
                    + Character.digit(s.charAt(i+1), 16));
        }
        return data;
    }

}

测试：

在线计算比较

快捷计算网址：CRC在线计算https://www.lddgo.net/encrypt/crc
对比正确