package com.shlb.comb.util;

public class CRCutil {
    /**
     * 计算CRC16校验码
     *
     * @param bytes
     * @return
     */
    public static String getCRC(byte[] bytes) {
        int CRC = 0xFFFF;
        int POLYNOMIAL = 0xA001;

        int i, j,m,n;
        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;
                }
            }
        }
        m = CRC /256;
        n = CRC%256;
        CRC = n * 256 +m;
        return Integer.toHexString(CRC);

    }


}