package com.ld.igds.util;
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/**
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* @author vince.xu
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* @Title: YiHuo
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* @ProjectName ld-depot
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* @Description:
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* @date 2019/9/8 000823:07
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*/
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public class YiHuo {
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public static void main(String[] args) {
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//7E 80 01 00 06 01 38 20 03 63 16 02 5F 01 89 01 02 00 3E 7E
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String message = "0102000601382003631602190138200363161E";
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String yihuo = message.substring(message.length()-2);
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String msg = message.substring(0,message.length()-2);
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//System.out.println(message.substring(18,20));
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System.out.println(yihuo);
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System.out.println(msg);
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System.out.println(YiHuo.getYiHuo("01 02 00 06 01 38 20 03 63 16 00 01 01 38 20 03 63 16".replaceAll(" ","")));
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}
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public static String getYiHuo(String data){
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int len = data.length();
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short inb[] = new short[len];
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int i = 0,j = 0;
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for(i=0;i<len;i++){
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inb[i] = charToHex(data.charAt(i)); //将String里的每一个char转换为Hex
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}
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for(i =0;i<len;i++){ //将每两个Hex合并成一个byte
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inb[j] = (byte) (((inb[i]<<4)&0x00f0)|((inb[i+1])&0x000f));
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i++;
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j++;
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}
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byte temp = 0x00; //校验值
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for(i = 0;i<len/2;i++){ //异或
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temp ^= inb[i];
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}
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return String.format("%x", temp);
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}
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static short charToHex(char x){ //将单个char转换为Hex
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short result = 0;
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switch(x){
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case 'a':result=10;break;
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case 'b':result=11;break;
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case 'c':result=12;break;
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case 'd':result=13;break;
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case 'e':result=14;break;
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case 'f':result=15;break;
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case 'A':result=10;break;
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case 'B':result=11;break;
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case 'C':result=12;break;
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case 'D':result=13;break;
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case 'E':result=14;break;
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case 'F':result=15;break;
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default:result = (short) Character.getNumericValue(x);break;
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}
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return result;
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}
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}
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