CRC8算法请百度，我也不懂，这里只是把自己运行成功的结构贴出来了。方法CRC8_Tab这里没有处理，因为我的程序中没有用到。
package com.crc;
public class CCRC8_3 {
/*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 };
public static int CRC8_Tab(int ucPtr,int ucLen){
int ucIndex;//CRC8校验表格索引
int ucCRC8 =0;//CRC8字节初始化
//进行CRC8位校验
while(ucLen--!=0){
ucIndex=ucCRC8^(ucPtr++);
ucCRC8=CRC8_TAB[ucIndex];
}
//返回CRC8校验数据
return (~ucCRC8);
}*/
public static int FindCRC(byte[] data){
int CRC=0;
int genPoly = 0Xaa;
for(int i=0;i<data.length; i++){
CRC ^= data[i];
for(int j=0;j<8;j++){
if((CRC & 0x80) != 0){
CRC = (CRC << 1) ^ genPoly;
}else{
CRC <<= 1;
}
}
}
CRC &= 0xff;//保证CRC余码输出为2字节。
return CRC;
}
public static void main(String[] args) {
String abc = "12431312sdrfd";
int crc2 = FindCRC(abc.getBytes());
String crc16 = Integer.toHexString(crc2);//把10进制的结果转化为16进制
//如果想要保证校验码必须为2位，可以先判断结果是否比16小，如果比16小，可以在16进制的结果前面加0
if(crc2 < 16 ){
crc16 = "0"+crc16;
}
System.out.println(crc16);
}
}