gather-server/src/main/java/com/gzlh/device/electron/utils/CheckNumUtils.java

package com.gzlh.device.electron.utils;

import cn.hutool.core.util.HexUtil;

public class CheckNumUtils {
    public static String calculateChecksum(byte[] uBuff, int uBuffLen) {
        int uSum = 0;
        for (int i = 0; i < uBuffLen; i++) {
            uSum = uSum + (uBuff[i] & 0xFF);
        }
        uSum = (~uSum) + 1;
        return HexUtil.toHex(uSum & 0xFF);
    }
    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;
    }

    public static String calculateChecksum(String s){
        byte[]array=   hexStringToByteArray(s);
        return   calculateChecksum(array,array.length);
    }

}