package com.ld.igds.util;


/**
 * @author vince.xu
 * @Title: YiHuo
 * @ProjectName ld-depot
 * @Description:
 * @date 2019/9/8 000823:07
 */
public class YiHuo {
    public static void main(String[] args) {
        //7E 80 01 00 06 01 38 20 03 63 16 02 5F 01 89 01 02 00 3E 7E

        String message = "0102000601382003631602190138200363161E";


        String yihuo = message.substring(message.length()-2);
        String msg = message.substring(0,message.length()-2);
        //System.out.println(message.substring(18,20));
        System.out.println(yihuo);
        System.out.println(msg);
        System.out.println(YiHuo.getYiHuo("01 02 00 06 01 38 20 03 63 16 00 01 01 38 20 03 63 16".replaceAll(" ","")));

    }
    public  static  String getYiHuo(String data){
        int len = data.length();
        short inb[] = new short[len];
        int i = 0,j = 0;
        for(i=0;i<len;i++){
            inb[i] = charToHex(data.charAt(i));   //将String里的每一个char转换为Hex
        }

        for(i =0;i<len;i++){    //将每两个Hex合并成一个byte
            inb[j] = (byte) (((inb[i]<<4)&0x00f0)|((inb[i+1])&0x000f));
            i++;
            j++;
        }
        byte temp = 0x00; //校验值
        for(i = 0;i<len/2;i++){ //异或
            temp ^= inb[i];
        }
        return String.format("%x", temp);
    }
    static short charToHex(char x){ //将单个char转换为Hex
        short result = 0;
        switch(x){
            case 'a':result=10;break;
            case 'b':result=11;break;
            case 'c':result=12;break;
            case 'd':result=13;break;
            case 'e':result=14;break;
            case 'f':result=15;break;

            case 'A':result=10;break;
            case 'B':result=11;break;
            case 'C':result=12;break;
            case 'D':result=13;break;
            case 'E':result=14;break;
            case 'F':result=15;break;
            default:result = (short) Character.getNumericValue(x);break;
        }
        return result;
    }
}