package com.dy.common.util;
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/**
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* @Author: liurunyu
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* @Date: 2024/7/27 15:50
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* @Description
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*/
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public class BCDUtil {
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/**
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*
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* @param num
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* @return
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*/
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public static byte[] int2BCD_LE(int num){
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int len = (int) Math.log10(num) + 1 ;
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byte[] bs = null ;
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if(len % 2 == 0){
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bs = new byte[len / 2] ;
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}else{
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bs = new byte[len / 2 + 1] ;
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}
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int index = 0 ;
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while(num > 0){
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int yu = num % 100 ;
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bs[index++] = (byte)(((yu/10) << 4) + (yu%10)) ;
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num = num / 100 ;
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}
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return bs ;
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}
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/**
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*
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* @param num
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* @return
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*/
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public static byte[] int2BCD_BE(int num){
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int len = (int) Math.log10(num) + 1 ;
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byte[] bs = null ;
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if(len % 2 == 0){
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bs = new byte[len / 2] ;
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}else{
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bs = new byte[len / 2 + 1] ;
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}
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int index = bs.length - 1 ;
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while(num > 0){
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int yu = num % 100 ;
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bs[index--] = (byte)(((yu/10) << 4) + (yu%10)) ;
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num = num / 100 ;
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}
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return bs ;
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}
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/**
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*
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* @param num
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* @return
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*/
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public static byte[] long2BCD_LE(long num){
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int len = (int) Math.log10(num) + 1 ;
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byte[] bs = null ;
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if(len % 2 == 0){
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bs = new byte[len / 2] ;
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}else{
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bs = new byte[len / 2 + 1] ;
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}
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int index = 0 ;
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while(num > 0){
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long yu = num % 100 ;
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bs[index++] = (byte)(((yu/10) << 4) + (yu%10)) ;
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num = num / 100 ;
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}
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return bs ;
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}
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/**
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*
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* @param num
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* @return
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*/
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public static byte[] long2BCD_BE(long num){
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int len = (int) Math.log10(num) + 1 ;
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byte[] bs = null ;
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if(len % 2 == 0){
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bs = new byte[len / 2] ;
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}else{
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bs = new byte[len / 2 + 1] ;
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}
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int index = bs.length - 1 ;
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while(num > 0){
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long yu = num % 100 ;
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bs[index--] = (byte)(((yu/10) << 4) + (yu%10)) ;
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num = num / 100 ;
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}
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return bs ;
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}
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/**
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*
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* @param numStr
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* @return
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*/
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public static byte[] string2BCD_LE(String numStr) throws Exception{
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if (numStr == null || !numStr.matches("\\d*")) {
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throw new Exception("数字转成BCD编码时出错，不是合法数字:" + numStr, null);
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}
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int numLen = numStr.length() ;
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int byteLen = 0 ;
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if(numLen % 2 == 0){
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byteLen = numLen / 2 ;
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}else{
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byteLen = numLen / 2 + 1 ;
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}
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int[] tmpInts = new int[byteLen * 2];
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int index = numStr.length() - 1;
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for (int i = 0; i <= tmpInts.length - 1 && index >= 0; i++, index--) {
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tmpInts[i] = numStr.charAt(index) - '0';
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}
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byte[] bs = new byte[byteLen] ;
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for (int i = 0, j = 0; i < byteLen; i++, j++) {
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bs[i] = (byte) (tmpInts[2 * j + 1] * 16 + tmpInts[2 * j]);
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}
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return bs ;
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}
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/**
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*
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* @param numStr
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* @return
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*/
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public static byte[] string2BCD_BE(String numStr) throws Exception{
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if (numStr == null || !numStr.matches("\\d*")) {
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throw new Exception("数字转成BCD编码时出错，不是合法数字:" + numStr, null);
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}
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int numLen = numStr.length() ;
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int byteLen = 0 ;
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if(numLen % 2 == 0){
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byteLen = numLen / 2 ;
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}else{
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byteLen = numLen / 2 + 1 ;
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}
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int[] tmpInts = new int[byteLen * 2];
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int index = numStr.length() - 1;
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for (int i = tmpInts.length - 1; i >= 0 && index >= 0; i--, index--) {
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tmpInts[i] = numStr.charAt(index) - '0';
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}
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byte[] bs = new byte[byteLen] ;
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for (int i = 0, j = 0; i < byteLen; i++, j++) {
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bs[i] = (byte) (tmpInts[2 * j] * 16 + tmpInts[2 * j + 1]);
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}
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return bs ;
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}
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/**
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*
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* @param bs
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* @return
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*/
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public static int BCD2Int_LE(byte[] bs){
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int num = 0 ;
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int multiple = 1 ;
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for(int i = 0; i < bs.length; i++){
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num += (((bs[i] >> 4) * 10) + (bs[i] & 0xF)) * multiple ;
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multiple = multiple * 100 ;
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}
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return num ;
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}
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/**
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*
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* @param bs
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* @return
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*/
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public static int BCD2Int_BE(byte[] bs){
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int num = 0 ;
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int multiple = 1 ;
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for(int i = bs.length-1; i >= 0 ; i--){
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num += (((bs[i] >> 4) * 10) + (bs[i] & 0xF)) * multiple ;
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multiple = multiple * 100 ;
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}
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return num ;
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}
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/**
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*
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* @param bs
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* @return
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*/
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public static long BCD2Long_LE(byte[] bs){
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long num = 0 ;
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long multiple = 1 ;
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for(int i = 0; i < bs.length; i++){
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num += (((bs[i] >> 4) * 10) + (bs[i] & 0xF)) * multiple ;
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multiple = multiple * 100 ;
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}
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return num ;
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}
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/**
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*
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* @param bs
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* @return
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*/
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public static long BCD2Long_BE(byte[] bs){
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long num = 0 ;
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long multiple = 1 ;
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for(int i = bs.length-1; i >= 0 ; i--){
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num += (((bs[i] >> 4) * 10) + (bs[i] & 0xF)) * multiple ;
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multiple = multiple * 100 ;
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}
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return num ;
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}
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/**
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*
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* @param bs
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* @return
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*/
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public static String BCD2String_LE(byte[] bs) throws Exception{
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StringBuilder sb = new StringBuilder();
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for (int i = (bs.length - 1); i >= 0; i--) {
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int value = (bs[i] + 256) % 256;
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sb.append((char) (value / 16 + '0')).append((char) (value % 16 + '0'));
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}
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String result = sb.toString();
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if (!result.matches("\\d*")) {
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throw new Exception("解码BCD，但数据非BCD码！");
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}
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return result;
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}
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/**
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*
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* @param bs
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* @return
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*/
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public static String BCD2String_BE(byte[] bs) throws Exception{
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < bs.length ; i++) {
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int value = (bs[i] + 256) % 256;
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sb.append((char) (value / 16 + '0')).append((char) (value % 16 + '0'));
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value++;
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}
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String result = sb.toString();
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if (!result.matches("\\d*")) {
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throw new Exception("解码BCD，但数据（" + result + "非BCD码！");
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}
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return result;
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}
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public static void main(String[] args) throws Exception {
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int num = 1234567;
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byte[] bs = int2BCD_LE(num) ;
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int num_ =BCD2Int_LE(bs) ;
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System.out.println(num_);
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bs = int2BCD_BE(num) ;
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num_ = BCD2Int_BE(bs);
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System.out.println(num_);
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String str = "12345678901234567890" ;
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bs = string2BCD_LE(str) ;
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String str_ = BCD2String_LE(bs) ;
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System.out.println(str_);
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bs = string2BCD_BE(str) ;
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str_ = BCD2String_BE(bs) ;
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System.out.println(str_);
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}
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}
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