Qt中字符串转换十六进制

main.cpp 主函数

 #include "StringToHex.h"
    QString str = "ABBCCDD120190E";
    QByteArray temp;
    StringToHex(str, temp);
    qDebug()<<temp.toHex();
    qDebug()<<temp;

 StringToHex.h的头文件

char ConvertHexChar(char ch)
{
    if((ch >= "0") && (ch <= "9"))
        return ch-0x30;
    else if((ch >= "A") && (ch <= "F"))
        return ch-"A"+10;
    else if((ch >= "a") && (ch <= "f"))
        return ch-"a"+10;
    else return (-1);
}


void StringToHex(QString str, QByteArray &senddata)
{
    int hexdata,lowhexdata;
    int hexdatalen = 0;
    int len = str.length();
    senddata.resize(len/2);
    char lstr,hstr;
    for(int i=0; i<len; )
    {
        //char lstr,
        hstr=str[i].toAscii();
        if(hstr == " ")
        {
            i++;
            continue;
        }
        i++;
        if(i >= len)
            break;
        lstr = str[i].toAscii();
        hexdata = ConvertHexChar(hstr);
        lowhexdata = ConvertHexChar(lstr);
        if((hexdata == 16) || (lowhexdata == 16))
            break;
        else
            hexdata = hexdata*16+lowhexdata;
        i++;
        senddata[hexdatalen] = (char)hexdata;
        hexdatalen++;
    }
    senddata.resize(hexdatalen);
}

结果显示：