十六进制转换工具

Posted 2021-05-15 guxiaohai_

//十六进制字符串
public static final String HEXMAXSTRING = "0123456789ABCDEF";

/**
 * @Author: guwenhai
 * @Description:    将十六进制的字符串转换成字节数组
 * @param hexString 数据消息
 * @Date: 2020/11/2 18:15
 */
public static byte[] hexStrToBinaryStr(String hexString) {
    if(StringUtils.isBlank(hexString)){
        return null;
    }
    hexString = hexString.replaceAll(" ", "");
    int len = hexString.length();
    int index = 0;
    byte[] bytes = new byte[len / 2];
    while (index < len) {
        if(hexString.length() >= 2){
            String sub = hexString.substring(index, index + 2);
            bytes[index/2] = (byte)Integer.parseInt(sub,16);
            index += 2;
        }
    }
    return bytes;
}

/**
 * @Author: guwenhai
 * @Description:   byte[]转16进制Str
 * @Date: 2020/11/2 11:58
 */
public static String ByteArrayToHexStr(byte[] byteArray){
    if (byteArray == null)
        return null;
    char[] hexArray = HEXMAXSTRING.toCharArray();
    char[] hexChars = new char[byteArray.length * 2];
    for (int i = 0; i < byteArray.length; i++){
        int temp = byteArray[i] & 0xFF;
        hexChars[i * 2] = hexArray[temp >>> 4];
        hexChars[i * 2 + 1] = hexArray[temp & 0x0F];
    }
    return new String(hexChars);
}

/**
 * @Author: guwenhai
 * @Description:    计算校验位 ，返回十六进制校验位
 * @Date: 2020/11/3 20:55
 */
public static String makeCheckSum(String data) {
    int dSum = 0;
    int length = data.length();
    int index = 0;
    // 遍历十六进制，并计算总和
    while (index < length) {
        String s = data.substring(index, index + 2); // 截取2位字符
        dSum += Integer.parseInt(s, 16); // 十六进制转成十进制 , 并计算十进制的总和
        index = index + 2;
    }
    int mod = dSum % 256; // 用256取余，十六进制最大是FF，FF的十进制是255
    String checkSumHex = Integer.toHexString(mod); // 余数转成十六进制
    length = checkSumHex.length();
    if (length < 2) {
        checkSumHex = "0" + checkSumHex;  // 校验位不足两位的，在前面补0
    }
    return checkSumHex;
}

/**
 * @Author: guwenhai
 * @Description:    字符串转换十六进制
 * @param str 字符数据
 * @Date: 2020/11/19 17:38
 */
public static String toHexString(String str){
    if(StringUtils.isNotBlank(str)){
        byte[] arrInput;
        try
        {
            char[] chars = HEXMAXSTRING.toCharArray();
            arrInput = str.getBytes("GBK");
            StringBuilder sOutput = new StringBuilder(arrInput.length);
            int bit;
            for (int i = 0; i < arrInput.length; i++) {
                bit = (arrInput[i] & 0x0f0) >> 4;
                sOutput.append(chars[bit]);
                bit = arrInput[i] & 0x0f;
                sOutput.append(chars[bit]);
            }
            return sOutput.toString();
        } catch (UnsupportedEncodingException e){
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    return "";
}

/**
 * @Author: guwenhai
 * @Description:    取十六进制低位字符
 * @param strhours 元数据
 * @Date: 2020/11/19 19:27
 */
public static String lowOrderByte(String strhours){
    String strh = "";
    if(strhours.length() > 2){
        strh = strhours.substring(strhours.length() -2,strhours.length());   //截取
    } else if(strhours.length() == 2){
        strh = strhours;
    } else{
        strh = "0" + strhours;
    }
    return strh;
}

/**
 * @Author: guwenhai
 * @Description:  十进制数字转换十六进制
 * @param str   字符信息
 * @param separator 分隔符
 * @Date: 2020/11/19 18:16
 */
public static String numberHEX(String str,String separator){
    if(StringUtils.isNotBlank(str)){
        if(StringUtils.isNotBlank(separator)){
            String[] f = str.split(separator);
            String g ="";
            for (int i = 0; i < f.length; i++) {
                if(Integer.toHexString(Integer.valueOf(f[i])).length() < 2){
                    g += "0" + Integer.toHexString(Integer.valueOf(f[i]));
                } else{
                    g += Integer.toHexString(Integer.valueOf(f[i]));
                }
            }
            return g;
        } else{
            String hex = Integer.toHexString(Integer.valueOf(str));
            if(hex.length() < 2){
                return "0" + hex;
            } else{
                return hex;
            }
        }
    }
    return "";
}

/**
 * @Author: guwenhai
 * @Description:    二进制转换十六进制
 * @param src 值
 * @Date: 2020/12/2 10:43
 */
public static String parseByte2HexStr(String src) {
    if(StringUtils.isNotBlank(src)){
        String data = Integer.toHexString((int) Long.parseLong(src.trim(), 2));
        if(data.length() < 2){
            return "0" + data;
        }
        return data;
    }
    return "00";
}

/**
 * @Author: guwenhai
 * @Description:    16进制直接转换成为字符串(无需Unicode解码)
 * @Date: 2020/12/8 9:56
 */
public static String hexStr2Str(String hexStr) {
    char[] hexs = hexStr.toCharArray();
    byte[] bytes = new byte[hexStr.length() / 2];
    int n;
    for (int i = 0; i < bytes.length; i++) {
        n = HEXMAXSTRING.indexOf(hexs[2 * i]) * 16;
        n += HEXMAXSTRING.indexOf(hexs[2 * i + 1]);
        bytes[i] = (byte) (n & 0xff);
    }
    return new String(bytes);
}