JavaCRC16MODBUS校验算法实现

CRC16 MODBUS校验算法&＃xff0c;分两种情况&＃xff0c;一是参数是字符串&＃xff0c;二是参数是字节数组。
参考文章1
参考文章2
直接上代码&＃xff0c;第一种参数是字符串

public static void main(String[] args) throws IOException {String frame &＃61; "01 03 01 48 00 0c";System.out.println(getCRC(frame));
}public static String getCRC(String data) {data &＃61; data.replace(" ", "");int len &＃61; data.length();if (!(len % 2 &＃61;&＃61; 0)) {return "0000";}int num &＃61; len / 2;byte[] para &＃61; new byte[num];for (int i &＃61; 0; i }/*** 计算CRC16校验码** &＃64;param bytes* 字节数组* &＃64;return {&＃64;link String} 校验码* &＃64;since 1.0*/
public static String getCRC(byte[] bytes) {// CRC寄存器全为1int CRC &＃61; 0x0000ffff;// 多项式校验值int POLYNOMIAL &＃61; 0x0000a001;int i, j;for (i &＃61; 0; i >&＃61; 1;CRC ^&＃61; POLYNOMIAL;} else {CRC >>&＃61; 1;}}}// 结果转换为16进制String result &＃61; Integer.toHexString(CRC).toUpperCase();if (result.length() !&＃61; 4) {StringBuffer sb &＃61; new StringBuffer("0000");result &＃61; sb.replace(4 - result.length(), 4, result).toString();}//高位在前地位在后//return result.substring(2, 4) &＃43; " " &＃43; result.substring(0, 2);// 交换高低位&＃xff0c;低位在前高位在后return result.substring(2, 4) &＃43; " " &＃43; result.substring(0, 2);
}


执行后结果&＃xff1a;

第二种参数是byte数组&＃xff1a;

public static void main(String[] args) throws IOException {byte[] bytes &＃61; new byte[] { 0x01, 0x03, 0x01, 0x48, 0x00, 0x0c };System.out.println(getCRC2(bytes));
}public static String getCRC2(byte[] bytes) {int CRC &＃61; 0x0000ffff;int POLYNOMIAL &＃61; 0x0000a001;int i, j;for (i &＃61; 0; i >&＃61; 1;CRC ^&＃61; POLYNOMIAL;} else {CRC >>&＃61; 1;}}}// 交换高低位&＃xff0c;低位在前高位在后CRC &＃61; ((CRC & 0x0000FF00) >> 8) | ((CRC & 0x000000FF) <<8);String result &＃61; Integer.toHexString(CRC);return result.substring(0, 2) &＃43; " " &＃43; result.substring(2, 4);
}


运行结果&＃xff1a;

小菜一枚&＃xff0c;不正确之处还请各位指教&＃xff01;